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Wyoming Climate      |      Click on Image to Enlarge
Statewide averages and ranks for periods including October 2017 will be available on November 8, 2017*
* 2017 Climate Monitoring Release Dates

Wyoming: September 2017

Precipitation - Percent of Normal Temperature - Departure from Normal
Wyoming: Last Month Percent of Normal Precipitation Wyoming: Last Month Departure from Normal Temperature
 Statewide Average (inches) 2.15  Statewide Average (°F) 54.3
 20th Century Average 1.24  20th Century Average 53.6
 Rank - Driest  to Wettest  (123 Years) 112 Rank - Warmest  to Coldest (123 Years) 55
 Rank - Wettest to Driest  (123 Years) 12  Rank - Coldest to Warmest (123 Years) 69
 Driest Month on Record:  September 1979 0.26   Warmest Month on Record: September 1998 59.9
 Wettest Year on Record: September 1923 3.44   Coldest Month on Record: September 1965 44.6

Wyoming: Water Year 2016-17 (Oct-Sep)

Precipitation - Percent of Normal Temperature - Departure from Normal
Wyoming: Water Year 2016-17 Percent of Normal Precipitation (Click to Enlarge) Wyoming: Water Year 2016-17 Departure from Normal Temperature
Climate Division:
Wyoming (Statewide Averages)
  Oct
2016
Nov
2016
Dec
2016
  Jan
2017
Feb
2017
Mar
2017
Apr
2017
May
2017
Jun
2017
Jul
2017
Aug
2017
Sep
2017
  Total for
WY 2016-17
  Average Temperature   46.5 37.1 16.8   16.8 28.0 38.5 40.2 49.3 60.1 68.9 63.5 54.3   43.3
  20th Century Average   42.5 29.0 20.6   18.4 22.3 29.1 38.8 48.4 57.6 65.3 63.4 53.6   39.6
  Departure from Average   4.0 8.1 -3.8   -1.6 5.7 9.4 1.4 0.9 2.5 3.6 0.1 0.7   2.6
  Rank: Warm to Cold (123 yrs)   11 3 102    88 13 3 45 53 28 8 65 55   9
  Rank: Cold to Warm (123 yrs)   112 120 21    35 111 121 79 71 96 116 59 69   114
  Precipitation   1.81 0.84 1.82    1.65 2.01 1.89 2.80 1.80 1.09 0.96 0.96 2.15   19.78
  20th Century Average   1.20 1.03 1.01   1.06 0.97 1.25 1.77 2.21 1.84 1.28 1.07 1.24    15.93
  Percent of Average   151 82 180    156 207 151 158 81 59 75 90 173   124
  Rank: Dry to Wet (123 yrs)   18 42 118   114 119 110 115 45 25 32 65 112   119
  Rank: Wet to Dry (123 yrs)   105 71 5   9 5 14 9 79 99 92 59 12   4
    
Maps and Statewide Averages for 3, 12 and 60 Months

Wyoming Climate Divisions: Water Year 2016-17 (Oct - Sep)

Wyoming Climate Divisions Map - Click to Enlarge

Wyoming Climate Divisions: September 2017 Rankings

Precipitation Rankings
Driest to Wettest 123 Years
Temperature Rankings
Coldest to Warmest 123 Years
Wyoming Climate Divisions: Last Month Precipitation Ranks (Click to Enlarge) Wyoming Climate Divisions: Last Month Average Temperature Rankings (Click to Enlarge)

Wyoming Climate Division Rankings: October 2016 - August 2017

Precipitation Rankings
Driest to Wettest 123 Years
Temperature Rankings
Coldest to Warmest 123 Years
Wyoming Climate Divisions: Water Year 2016-17 Precipitation Rankings (Click to Enlarge) Wyoming Climate Divisions: Water Year 2016-17 Temperature Rankings (Click to Enlarge)

Climate Division 1 - Yellowstone Drainage
Climate Division:
Yellowstone (Division Averages)
  Oct
2016
Nov
2016
Dec
2016
  Jan
2017
Feb
2017
Mar
2017
Apr
2017
May
2017
Jun
2017
Jul
2017
Aug
2017
Sep
2017
  Total for
WY 2016-17
  Average Temperature   40.2 33.2 12.5   13.8 24.1 34.3 35.4 44.4 52.2 61.6 57.6 48.6   38.2
  20th Century Average   37.3 24.6 16.9   15.2 18.9 24.3 33.3 42.4 50.3 57.9 56.2 47.4   35.4
  Departure from Avegage   2.9 8.6 -4.4   -1.4 5.2 10.1 2.1 2.0 1.7 3.7 1.4 1.2   2.8
  Rank: Warm to Cold (123 yrs)   24 2 106    87 15 2 38 31 30 7 35 45   7
  Rank: Cold to Warm (123 yrs)   99 121 17    36 109 122 86 93 94 117 89 79   116
  Precipitation   6.06 1.75 4.74    3.20 5.61 3.60 4.09 1.49 2.17 1.39 1.02 4.56   39.68
  20th Century Average   1.88 2.49 2.63   2.89 2.26 2.61 2.47 2.84 2.57 1.61 1.51 1.80    27.56
  Percent of Average   322 70 180    111 248 138 166 52 84 86 68 253   144
  Rank: Dry to Wet (123 yrs)   122 37 118   79 122 100 119 9 54 59 40 122   122
  Rank: Wet to Dry (123 yrs)   1 86 5   44 2 24 5 115 70 65 84 2   1
    

Station Name:   Oct
2016
Nov
2016
Dec
2016
  Jan
2017
Feb
2017
Mar
2017
Apr
2017
May
2017
Jun
2017
Jul
2017
Aug
2017
Sep
2017
  Total for
WY 2016-17
 click on location   D0 D1                                
 for graph D2 D3 D4                                
Old Faithful None   8.18 1.24 4.08   2.88 7.27 2.16 2.04 0.92 2.25 1.55 0.50 5.50   38.57
  1981-2010 Normals   1.66 2.29 3.16    2.11 1.99 2.21 2.21 2.80 2.47 1.55 1.46 1.46    25,37
  Percent of Normal    493 54 129    136 365 98 92 33 91 100 34 377   152
Snowfall   8.0 16.8 76.5    47.0  68.0 18.0 20.0 4.0 0.0 0.0 0.0 4.0   262.3
1981-2010 Normals   7.7 31.7 43.8   37.5 31.1 26.8 19.3 7.3 1.2 0.0 0.0 1.4    207.8
  Percent of Normal    104 53 175    125 219 67 104 55 0 0 0 286   126
                                 

Climate Division 2 - Snake Drainage
Climate Division:
Snake (Division Averages)
  Oct
2016
Nov
2016
Dec
2016
  Jan
2017
Feb
2017
Mar
2017
Apr
2017
May
2017
Jun
2017
Jul
2017
Aug
2017
Sep
2017
  Total for
WY 2016-17
  Average Temperature   38.9 31.5 12.0   12.3 24.3 32.6 33.4 43.3 51.4 60.4 56.7 47.6   37.0
  20th Century Average   37.4 24.3 16.0   14.7 18.3 23.6 33.0 42.3 50.0 57.7 56.0 47.5   35.1
  Departure from Avegage   1.5 7.2 -4.0   -2.4 6.0 9.0 0.4 1.0 1.4 2.7 0.7 0.1   2.0
  Rank: Warm to Cold (123 yrs)   36 3 104    94 11 2 57 46 38 13 49 66   10
  Rank: Cold to Warm (123 yrs)   87 120 19    29 113 122 67 78 86 111 75 58   113
  Precipitation   7.26 1.85 7.42    5.37 8.86 4.50 4.31 1.24 2.75 1.03 0.68 4.47   49.74
  20th Century Average   2.12 3.33 3.72   4.34 3.59 3.45 2.81 2.91 2.31 1.32 1.46 1.77    33.13
  Percent of Average   342 56 199   124 247 130 153 43 119 78 47 253   150
  Rank: Dry to Wet (123 yrs)   122 25 118   92 122 95 113 9 87 55 28 121   121
  Rank: Wet to Dry (123 yrs)   1 98 5   31 2 29 11 115 37 69 96 3   2
    

v v v0.63
Station Name:   Oct
2016
Nov
2016
Dec
2016
  Jan
2017
Feb
2017
Mar
2017
Apr
2017
May
2017
Jun
2017
Jul
2017
Aug
2017
Sep
2017
  Total for
WY 2016-17
 click on location   D0 D1                                
 for graph D2 D3 D4                                
Afton None   4.49 0.70 1.55   3.07 3.00 1.36 2.99 0.63 0.95 0.31 0.39 4.08   23.52
  1981-2010 Normals   1.63 2.04 1.25   1.40 1.09 1.40 1.54 2.26 1.97 1.43 1.25 1.46   18.16
  Percent of Normal    275 47 124   219 275 97 194 28 48 22 31 279   130
Snowfall   7.2 8.5 24.0    40.6 23.9 9.7 14.2 0.5 0.0 0.0 0.0 1.0   129.6
                                 
Moose None   5.25 1.70 5.27   3.39 5.88 2.03 2.79 0.74 3.07 0.64 0.40 3.36   34.52
  1981-2010 Normals   1.47 2.64 2.67   2.58 1.82 1.62 1.49 1.88 1.61 1.29 1.29 1.44    21.80
  Percent of Normal    357 64 197   131 308 125 187 39 191 50 31 233   158
Snowfall   3.0 10.5 64.9    44.0  32.9 1.8 17.8 1.1 T 0.0 0.0 0.0    176.0
1981-2010 Normals   4.8 24.1 44.7   36.9 26.6 15.9 7.4 2.2 0.0 0.0 0.0 0.2    162.8
  Percent of Normal    63 44 145    119 114 11 241 2.2 0 0 0 0   108
                                 
JHMR MId Mtn None                                
Snowfall   26.0 29.0 128.0    79.0 124.0 38.0 58.0 7.0 2.0     0.0    491.0
1975-2016 Average   16.0 33.0 77.0   83.0 65.0 55.0 20.0 13.0 2.0     1.0    365.0
  Percent of Normal    156 88 171    95 194 69  290 54 100     0   135
                                 

Climate Division 3 - Green and Bear Drainages
v
Climate Division:
Green and Bear (Division Averages)
  Oct
2016
Nov
2016
Dec
2016
  Jan
2017
Feb
2017
Mar
2017
Apr
2017
May
2017
Jun
2017
Jul
2017
Aug
2017
Sep
2017
  Total for
WY 2016-17
  Average Temperature   43.7 33.7 16.5   13.8 25,0 35.6 37.7 48.0 58.6 66.3 62.0 52.3   41.1
  20th Century Average   40.7 27.0 18.3   16.2 19.7 27.0 37.0 46.6 55.3 62.8 60.8 51.6   38.6
  Departure from Avegage   3.1 6.7 -1.8   -2.4 5.3 8.6 0.7 1.4 3.3 3.5 1.2 0.7   2.5
  Rank: Warm to Cold (123 yrs)   18 3 82    96 19 4 55 42 19 8 36 53   7
  Rank: Cold to Warm (123 yrs)   105 120 41    27 105 120 69 82 105 116 88 71   116
  Precipitation   2.19 0.81 1.81    2.47 2.27 2.15 1.75 1.19 0.45 0.62 0.93 2.15   18.79
  20th Century Average   1.16 1.03 1.03   1.15 1.06 1.17 1.37 1.55 1,14 0.94 1.00 1.10    13.70
  Percent of Average   189 79 176    215 214 184 128 77 39 66 93 195   137
  Rank: Dry to Wet (123 yrs)   112 43 115   119 120 116 93 46 22 36 67 111   121
  Rank: Wet to Dry (123 yrs)   11 30 8   4 4 8 31 78 102 88 57 13   2
    

v v v
Station Name:   Oct
2016
Nov
2016
Dec
2016
  Jan
2017
Feb
2017
Mar
2017
Apr
2017
May
2017
Jun
2017
Jul
2017
Aug
2017
Sep
2017
  Total for
WY 2016-17
 click on location   D0 D1                                
 for graph D2 D3 D4                                
Big Piney Airport  None   2.47 0.53 0.55   0.99 0.75 1.45 1.17 1.10 0.14 0.86 0.64 1.72   12.37
1981-2010 Normals    0.53  0.21  0.30    0.31  0.35  0.44  0.53  0.84 0.79  0.71  0.69  0.78    6.48
Percent of Normal    466 252 183   319 214 330 221 131 18 121 93 221    191
                                 
Evanston Airport None   1.21 0.15 0.22   1.08 1.18 0.77 0.31 1.82 0.25 0.10 0.01 T   7.10
  1981-2010 Normals   1.17 1.04 0.58   0.54 0.61 0.86 1.15 1.77 1.24 0.90 0.96 1.31    12.13
  Percent of Normal    103 14 38    200 193 90 27 103 20 11 1 0   59
                                 
Rock Springs Arpt.  None   0.46 0.14 0.08   0.49 0.41  1.43 0.55 0.64 0.02 0.14 0.70 0.77   5.83
 1981-2010 Normals    0.87  0.49  0.50    0.45  0.48  0.68  0.91  1.21  0.79  0.64  0.62  0.92    8.56
  Percent of Normal    53 29 16    109 85  210 60 53 3 22 113 84    68
                                 
Bitter Creek 4NE D0   0.91 0.20 0.22   0.66 0.57  1.46 0.33 0.84 0.04 0.16 0.98 1.07   7.44
  1981-2010 Normals   0.66 0.31 0.51   0.28 0.36 0.30 0.65 1.09 0.70 0.60 0.75 0.73    6.94
  Percent of Normal    138 65 43    236 158  487 51 77 6 27 131 147   107
                                 
Fossil Butte
National Monument
  None   2.96 0.72 1.50    3.25 2.50  2.76 2.16 0.69 0.59 0.02 1.40 3.22   21.77
1981-2010 Normals   1.11 0.86 0.74   0.49 0.68 0.82 0.98 1.41 1.03 0.85 0.93 1.10    11.00
  Percent of Normal    267 84 203   663 368  337 220 49 57 2 151 293   198
Snowfall   3.5 4.8 13.7    33.6 29.5  6.5 8.2 2.9 T 0.0 0.0 T    104.2
                                 
Green River None   1.56 1.00 0.40   2.78 2.91  1.75 2.06 1.33 0.17 0.28 1.10 1.70   16.32
  1981-2010 Normals   0.81 0.41 0.44    0.34  0.43 0.71  0.85 1.23 0.98 0.55  0.68  0.90    8.33
  Percent of Normal   193 244 91   818 509  246 242 1.08 17 51 162 189  

196

Snowfall   T 10.0 4.0   30.0 23.8  1.3 3.0 5.0 0.0 0.0 0.0 T    77.1
1981-2010 Normals   0.5 3.8 6.5   4.6 7.3 5.0 3.9 0.6 0.0 0.0 0.0 0.0   32.2
Percent of Normal   0 263 62   652 326 26 77 833 0 0 0 0    239
                                 
Rock Springs  None   0.93 0.87 0.45   1.98 1.83  1.91 1.08 0.87 0.26 0.82 0.98 0,94   12.92
  1981-2010 Normals   1.09 0.52 0.52    0.44  0.46 0.67  0.91 1.42 0.86 0.73  0.96  1.08    9.66
  Percent of Normal    85 167 87   450 398  285 119 61 30 112 102 87   134
Snowfall   0.0 11.9 1.1   19.2 22.0 T 0.0 4.0 0.0 0.0 0.0 0.0    58.2
                                 

Climate Division 4 - Big Horn Drainage
Climate Division:
Big Horn (Division Averages)
  Oct
2016
Nov
2016
Dec
2016
  Jan
2017
Feb
2017
Mar
2017
Apr
2017
May
2017
Jun
2017
Jul
2017
Aug
2017
Sep
2017
  Total for
WY 2016-17
  Average Temperature   46.1 38.2 15.6   15.6 27.6 39.5 41.3 50.7 60.5 69.7 64.1 54.0   43.6
  20th Century Average   42.6 29.2 20.6   17.7 22.7 30.2 39.8 49.1 58.1 65.8 63.7 53.5   41.1
  Departure from Avegage   3.5 9.0 -5.0   -2.1 4.9 9.3 1.5 1.6 2.4 3.9 0.4 0.5   2.5
  Rank: Warm to Cold (123 yrs)   17 3 108    90 25 4 41 37 29 8 57 64   10
  Rank: Cold to Warm (123 yrs)   106 120 15    33 99 120 83 87 95 116 67 60   113
  Precipitation   2.52 0.98 1.75   1.20 1.65 1.98 3.57 1.60 1.28 0.75 0.70 2.79   20.77
  20th Century Average   1.14 0.95 0.87   0.92 0.75 1.12 1.75 2.22 1.92 1.13 0.94 1.31   15.02
  Percent of Average   221 103 201   130 220 177 204 72 67 66 74 213   138
  Rank: Dry to Wet (123 yrs)   115 70 117   99 119 114 120 36 40 47 50 114   122
  Rank: Wet to Dry (123 yrs)   8 53 6   24 5 10 4 88 84 77 74 10   1
    

v
Station Name:   Oct
2016
Nov
2016
Dec
2016
  Jan
2017
Feb
2017
Mar
2017
Apr
2017
May
2017
Jun
2017
Jul
2017
Aug
2017
Sep
2017
  Total for
WY 2016-17
 click on location   D0 D1                                
 for graph D2 D3 D4                                
Greybull Airport   None   1.18 0.23 0.03   0.11 0.10 0.30 0.51 0.52 0.28 0.09 0.07 2.00   5.42
  1981-2010 Normals    0.30  0.28  0.60    0.23  0.18  0.40  0.71  1.65  1.20  0.66  0.42  0.88    7.51
  Percent of Normal    197 77 11    48 56 75 72 32 23 14 17 227   72
                                 
Worland Airport None   2.35 0.96 0.19   0.20 0.20 0.98 2.50 0.92 0.36 0.16 0.18 2.07   11.07
  1981-2010 Normals   0.69 0.35 0.23    0.23 0.19 0.46 0.86 1.42 1.15 0.71 0.43 0.85    7.57
  Percent of Normal    341 274 83    87 105 213 291 65 31 23 42 244   146
                                 
Cody  None   2.13 0.29 2.17   1.03 0.81 0.36 3.13 1.62 1.16 1.01 0.53 2.76   17.00
  1981-2010 Normals   0.89 0.48 0.33   0.33 0.33 0.56 1.06 1.82 1.68 1.11 0.91 1.06    10.56
  Percent of Normal    239 60 658    312 245 64 295 89 69 91 58 260    161
Snowfall   0.0 2.0 25.4    15.0 12.5 T T 0.0 0.0 T 0.0 0.0   54.9
1981-2010 Normals   4.3 6.3 8.0   7.8 6.7 6.9 6.3 0.8 0.0 0.0 0.0 0.2   47.3
  Percent of Normal    0 32 318    192 187 0 0 0 0 0 0 0   116
                                 
Powell Field Station   None   1.40 0.24 0.13   0.29 0.47 0.42 1.70 0.78 0.92 0.37 0.13 1.82   8.67
  1981-2010 Normals   0.56 0.18 0.13   0.21 0.13 0.29 0.51 1.40 1.35 0.87 0.52  0.65    6.80
  Percent of Normal    250 133 100    138 362 145 333 56 68 43 25 280   128
Snowfall   1.5 T 1.0    8.0 6.0 1.0 0.0 0.0 0.0 0.0 0.0 0,0   17.5
1981-2010 Normals    1.2 1.3 1.2   2.3 0.5 2.5 0.5 0.5 0.0 0.0 0.0 0.1   10.1
  Percent of Normal    125 0 83    348  1200 40 0 0 0 0 0 0    173
                                 
Thermopolis   None   2.49 0.94 0.35   0.50 0.41 3.41 5.02 1.63 0.85 0.52 0.29 2.62   19.03
  1981-2010 Normals   1.26 0.80 0.46   0.35 0.45 0.87 1.46 1.86 1.51 0.88 0.58 1.23    11.71
  Percent of Normal    198 118 76    143 91 392 344 88 56 59 50 213   163
Snowfall   0.0 8.0 5.0   12.0 10.0 T 0.0 0.0 0.0 0.0 0.0 0.0    35.0
1981-2010 Normals   2.4 3.7 4.5   5.6  4.6 2.5 2.8 0.4 0.0 0.0 0.0 0.2   26.7
  Percent of Normal    0 216 111    214 217 0 0 0 0 0 0 0   131

Climate Division 5 - Powder and Tongue Drainages
v
Climate Division:
Powder and Tongue
(Division Averages)
  Oct
2016
Nov
2016
Dec
2016
  Jan
2017
Feb
2017
Mar
2017
Apr
2017
May
2017
Jun
2017
Jul
2017
Aug
2017
Sep
2017
  Total for
WY 2016-17
  Average Temperature   48.7 40.2 15.5   17.7 29.6 40.6 42.8 51.6 62.3 72.8 66.2 56.3   45.4
  20th Century Average   44.6 31.1 22.4   19.6 23.8 31.1 41.2 50.8 60.2 68.2 66.5 55.9   43.0
  Departure from Avegage   4.1 9.1 -6.9   -1.9 5.8 9.5 1.6 0.8 2.1 4.6 -0.3 0.4   2.4
  Rank: Warm to Cold (123 yrs)   14 3 110   88 23 4 41 52 35 7 72 65   12
  Rank: Cold to Warm (123 yrs)   109 120 13   35 101 120 83 73 89 117 52 59   111
  Precipitation   1.11 0.57 0.97   0.55 0.57 1.51 4.08 1.80 1.65 0.80 0.74 1.55   15.90
  20th Century Average   1.16 0.77 0.65   0.63 0.61 1.05 1.85 2.54 2.35 1.40 0.99 1.28   15.28
  Percent of Average   96 74 149    87 93 144 221 71 70 57 75 121   104
  Rank: Dry to Wet (123 yrs)   59 39 102   59 65 101 121 28 37 23 49 90   70
  Rank: Wet to Dry (123 yrs)   64 84 21   64 62 23 3 96 87 101 75 34   53
    

v v2.021.99
Station Name:   Oct
2016
Nov
2016
Dec
2016
  Jan
2017
Feb
2017
Mar
2017
Apr
2017
May
2017
Jun
2017
Jul
2017
Aug
2017
Sep
2017
  Total for
WY 2016-17
 click on location   D0 D1                                
 for graph D2 D3 D4                                
Buffalo Airport None   1.99 0.49 0.25    0.10  0.33 2.02 3.18 2.65 1.70 1.41 0.51 1.79   16.42
1981-2010 Normals    0.93  0.54  0.40    0.42  0.35  0.92  1.30  2.53  2.28  1.66  0.81  1.31   13.45
  Percent of Normal    214 91 63    24  94 220 245 105 75 85 63 137    122
                                 
Sheridan Arpt None   1.45 1.28 1.00   1.04 0.66 3.43 4.60 2.24 1.11 0.38 0.43 1.89   19.51
  1981-2010 Normals    1.41  0.71  0.56    0.56  0.54  0.98  1.60  2.35 2.12  1.18  0.72  1.43   14.16
  Percent of Normal    103 180 179    186  122 350 288 99 52 32 60 132    138
                                 
Kaycee None   0.61 0.20 0.80   0.32 0.54 0.83 5.09 2.34 0.70 0.12 0.37 0.62   12.54
  1981-2010 Normals   1.04 0.57 0.31   0.30 0.34 0.74 1.46 2.37 1.84 1.42 0.80 1.18    12.37
  Percent of Normal    59 35 258    107 159 112 349 95 38 8 46 53    101
Snowfall   0.0 3.0 9.0    6.1 10.3 8.0 3.0 0.5 0.0 0.0 0.0 0.0   39.9
1981-2010 Normals   1.5 4.2 6.0   5.9 6.3 8.0 4.7 0.6 0.1 0.0 0.0 0.2   37.5
  Percent of Normal    0 71 150    103  163 100 64 83 0 0 0 0   106
                                 

Climate Division 6 - Belle Fourche Drainage
Climate Division:
Belle Fourche (Division Averages)
  Oct
2016
Nov
2016
Dec
2016
  Jan
2017
Feb
2017
Mar
2017
Apr
2017
May
2017
Jun
2017
Jul
2017
Aug
2017
Sep
2017
  Total for
WY 2016-17
  Average Temperature   49.8 40.7 13.8   17.4 30.0 40.2 42.9 52.0 63.5 74.3 66.2 57.3   45.7
  20th Century Average   45.0 31.0 22.1   19.0 23.1 30.6 41.4 51.3 60.9 68.8 67.0 56.4   43.1
  Departure from Avegage   4.8 9.7 -8.2   -1.6 6.9 9.6 1.5 0.7 2.6 5.5 -0.8 0.9   2.6
  Rank: Warm to Cold (123 yrs)   8 2 115   82 13 5 44 49 31 6 79 56   11
  Rank: Cold to Warm (123 yrs)   115 121 8   41 111 119 80 75 93 118 45 68   112
  Precipitation   0.62 0.52 0.99   0.70 0.39 0.68 3.08 1.69 2.19 1.89 1.37 2.28   16.40
  20th Century Average   1.14 0.69 0.64   0.59 0.59 0.98 1.75 2.66 2.83 1.84 1.33 1.32    16.36
  Percent of Average   54 75 155    119 66 69 176 64 77 103 103 173   100
  Rank: Dry to Wet (123 yrs)   31 48 107   90 34 36 116 32 48 47 73 106   66
  Rank: Wet to Dry (123 yrs)   92 75 16   33 90 88 8 92 76 77 51 18   57
    

Station Name:   Oct
2016
Nov
2016
Dec
2016
  Jan
2017
Feb
2017
Mar
2017
Apr
2017
May
2017
Jun
2017
Jul
2017
Aug
2017
Sep
2017
  Total for
WY 2016-17
 click on location   D0 D1                                
 for graph D2 D3 D4                                
Gillette Airport   D0   1.45 0.28 0.85   0.54 0.30 0.79 4.31 1.25 1.90 0.64 0.42 1.58   14.31
1981-2010 Normals    1.27  0.55  0.40    0.39 0.39  0.96  1.47  2.45 2.21  1.66  0.95  1.19    13.89
  Percent of Normal    114 51 213    138 77 82 293 51 86 39 44 133   103
                                 

Climate Division 7 - Cheyenne and Niobrara Drainages
Climate Division: Cheyenne and Niobrara
(Division Averages)
  Oct
2016
Nov
2016
Dec
2016
  Jan
2017
Feb
2017
Mar
2017
Apr
2017
May
2017
Jun
2017
Jul
2017
Aug
2017
Sep
2017
  Total for
WY 2016-17
  Average Temperature   50.6 40.5 15.7   19.2 30.7 41.0 44.0 52.4 64.3 74.0 66.8 58.7   46.5
  20th Century Average   45.9 31.8 23.0   20.3 24.6 32.1 42.5 52.4 62.5 70.3 68.4 57.6   44.3
  Departure from Avegage   4.7 8.7 -7.3   -1.1 6.1 8.9 1.5 0.0 1.8 3.7 -1.6 1.1   2.2
  Rank: Warm to Cold (123 yrs)   5 3 112   79 18 5 43 57 38 12 90 51   12
  Rank: Cold to Warm (123 yrs)   118 120 11   44 106 119 81 67 86 112 34 73   111
  Precipitation   0.22 0.37 0.72   0.53 1.03 0.79 2.70 2.11 1.50 1.79 1.22 1.26   14.24
  20th Century Average   0.95 0.55 0.48   0.42 0.46 0.76 1.68 2.53 2.34 1.78 1.21 1.14   14.30
  Percent of Average   23 67 150    126 224 104 161 83 64 101 101 111   100
  Rank: Dry to Wet (123 yrs)   8 40 104   89 119 71 108 51 37 47 69 78   59
  Rank: Wet to Dry (123 yrs)   115 83 19   34 5 53 16 73 87 77 55 46  

64

    

Climate Division 8 - Lower Platte Drainage
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Climate Division:
Lower Platte (Division Averages)
  Oct
2016
Nov
2016
Dec
2016
  Jan
2017
Feb
2017
Mar
2017
Apr
2017
May
2017
Jun
2017
Jul
2017
Aug
2017
Sep
2017
  Total for
WY 2016-17
  Average Temperature   50.9 40.6 21.6   23.2 32.4 41.7 43.3 51.1 62.9 71.7 65.7 58.0   46.9
  20th Century Average   45.2 32.3 24.7   22.8 25.9 32.1 41.2 50.8 60.7 68.0 66.2 56.4   43.9
  Departure from Avegage   5.7 8.3 -3.1   0.4 6.5 9.7 2.1 0.3 2.2 3.7 -0.5 1.6   3.1
  Rank: Warm to Cold (123 yrs)   3 3 102   55 8 3 37 60 33 11 71 45   5
  Rank: Cold to Warm (123 yrs)   120 120 21    68 116 121 87 64 91 113 53 79   118
  Precipitation   0.23 0.61 1.02   0.85 1.09 1.37 2.39 3.00 0.70 1.06 1.28 1.38   14.98
  20th Century Average   1.05 0.68 0.63   0.51 0.59 0.97 1.90 2.55 2.05 1.58 1.17 1.21   14.89
  Percent of Average   22 90 162   167 185 141 126 118 34 67 109 114   101
  Rank: Dry to Wet (123 yrs)   7 62 109   107 114 99 91 88 10 25 76     67
  Rank: Wet to Dry (123 yrs)   116 61 14   16 10 25 33 36 114 99 48     56
    

Station Name:   Oct
2016
Nov
2016
Dec
2016
  Jan
2017
Feb
2017
Mar
2017
Apr
2017
May
2017
Jun
2017
Jul
2017
Aug
2017
Sep
2017
  Total for
WY 2016-17
 click on location   D0 D1                                
 for graph D2 D3 D4                                
Casper Airport   None   0.16 0.38 1.31   0.54 0.81 1.79 2.21 2.25 1.01 0.37 0.94 1.42   13.19
1981-2010 Normals    1.11  0.76  0.49    0.51 0.57  0.82  1.29  2.02  1.61  1.41  0.85  1.08    12.52
  Percent of Normal    14 50 267    106 142 218 171 111 63 26 111 131    105
Snowfall   T 3.2 22.2   13.8  14.3 6.4 5.8 2.9 0.0 0.0 0.0 T   68.6
1981-2010 Normals   7.4 10.3 11.0   9.1 9.8 10.9 11.6 2.9 0.1 0.0 0.0 1.8   74.9
  Percent of Normal    0 31 202    152 146 59 50 100 0 0 0 0    92
                                 
Cheyenne Arpt None   0.27 0.38 0.43   0.77 0.61 0.73 2.57 3.89 0.67 0.53 2.11 1.08   14.04
  1981-2010 Normals    0.93  0.59  0.49    0.33  0.47  1.05  1.78  2.34  2.34  2.19 1.95  1.48   15.94
  Percent of Normal    29 64 88    233 130 70 144 2.34 29 24 108 73    88
Snowfall   T 3.8 6.2    13.1 8.3 0.1 8.7 14.7 0.0 T T T   54.9
1981-2010 Normals   5.0  8.0 8.4   5.9 7.9 11.3 10.2 2.3 0.0 0.0 0.0 1.3    60.3
  Percent of Normal    0 48 74    222 105 1 85 639 0 0 0 0   91
                                 

Climate Division 9 - Wind River Drainage
Climate Division:
Wind River (Division Averages)
  Oct
2016
Nov
2016
Dec
2016
  Jan
2017
Feb
2017
Mar
2017
Apr
2017
May
2017
Jun
2017
Jul
2017
Aug
2017
Sep
2017
  Total for
WY 2016-17
  Average Temperature   45.3 35.3 16.0   13.9 25.6 37.8 39.0 48.6 58.7 67.6 62.9 53.0   42.0
  20th Century Average   41.8 27.9 19.5   17.3 22.0 29.0 38.3 48.0 57.0 64.7 62.8 52.9   40.1
  Departure from Avegage   3.5 7.4 -3.5   -3.4 3.6 8.8 0.7 0.6 1.7 2.9 0.1 0.1   1.9
  Rank: Warm to Cold (123 yrs)   16 3 97    101 30 4 51 57 38 15 64 69   15
  Rank: Cold to Warm (123 yrs)   107 120 26   22 94 120 73 67 86 109 62 55   108
  Precipitation   2.08 0.92 2.03   1.84 2.46 3.16 3.31 1.82 1.00 0.55 0.95 2.74   22.86
  20th Century Average   1.20 0.96 0.84   0.93 0.81 1.26 1.89 2.25 1.67 1.04 0.88 1.19   14.92
  Percent of Average   173 96 242    198 304 251 175 81 60 53 108 230   153
  Rank: Dry to Wet (123 yrs)   104 59 120   113 120 121 115 47 44 33 81 115   122
  Rank: Wet to Dry (123 yrs)   19 64 3   10 4 3 9 77 80 91 43 9   1
    

v
Station Name:   Oct
2016
Nov
2016
Dec
2016
  Jan
2017
Feb
2017
Mar
2017
Apr
2017
May
2017
Jun
2017
Jul
2017
Aug
2017
Sep
2017
  Total for
WY 2016-17
 click on location   D0 D1                                
 for graph D2 D3 D4                                
Lander Airport None   0.98 1.49 0.90   1.27 1.11 4.65 3.26 2.20 0.26 0.43 M M   16.81
  1981-2010 Normals    1.29  0.86  0.58    0.41  0.58  1.16  1.87  2.20  1.27  0.78 0.61  1.05   12.66
  Percent of Normal    76 173 155    310 191 401 174 100 20 55 M M    133
Snowfall   0.0 14.0 9.1    18.3 19.6 5.7 17.4 6.8 0.0 0.0 0.0 0.0   90.9
1981-2010 Normals   9.8  13.1 10.1   7.6 10.3 16.1 16.8 4.8 0.1 0.0 0.0 2.7    91.4
  Percent of Normal    0 107 90    241 190 35 104 142 0 0 0 0   99
                                 
Riverton Airport  None   1.39 0.55 0.77   1.01 0.85 3.71 3.19 1.40 0.20 0.15 0.94 1.73   15.89
  1981-2010 Normals    0.89  0.50  0.32    0.24  0.27  0.55  1.30  1.72  1.28  0.89  0.57  0.90   9.43
  Percent of Normal    156 110 241    421 315 675 245 81 16 17 165 192   169
Snowfall   0.1 4.3 12.6    16.4 14.3 T 14.5 4.2 0.0 0.0 0.0 T   66.4
                                 
Dubois  None   1.79 0.50 1.05   0.84 2.06 1.84 1.02 1.13 1.59 1.09 1.32 4.10   18.33
  1981-2010 Normals   0.81 0.57 0.28   0.24 0.38 0.40 1.10 1.64 1.28 1.11 0.86 1.24    9.91
  Percent of Normal    221 88 375    350 542 460 93 69 124 98 153 331     185
Snowfall   3.0 6.0 23.1    19.5 39.0 8.2 7.0 2.5 0.0 0.0 0.0 1.5   109.8
1981-2010 Normals   3.0 5.8 5.1   3.9 5.7 6.0 8.5 3.9 0.6 0.0 0.0 2.6   45.1
  Percent of Normal    100 103 453    500 684 137 82 64 0 0 0 58   243
                                 
Riverton  None   1.55 0.75 0.93   1.12 0.96 2.45 4.70 1.34 0.49 0.37 1.09 1.71   17.46
  1981-2010 Normals   0.85 0.41 0.24   0.28 0.33 0.56 0.98 1.45 1.21 0.78 0.50 0.83    8.42
  Percent of Normal    182 183 388    400 291 438 480 92 40 47 218 206     207
Snowfall   T 7.3 12.9    16.8 15.1 T 20.9 2.2 T 0.0 T 0.0   75.2
1981-2010 Normals   3.7 4.3 4.8    4.8  6.0  5.9  6.1 1.2 0.0 0.0 0.0 0.3   37.1
  Percent of Normal    0 170 269    350 252 0 343 183 0 0 0 0   203

Climate Division 10 - Upper Platte Drainage
Climate Division:
Upper Platte (Division Averages)
  Oct
2016
Nov
2016
Dec
2016
  Jan
2017
Feb
2017
Mar
2017
Apr
2017
May
2017
Jun
2017
Jul
2017
Aug
2017
Sep
2017
  Total for
WY 2016-17
  Average Temperature   46.6 36.5 19.6   17.8 28.1 38.3 39.1 47.9 60.0 67.6 62.8 53.9   43.2
  20th Century Average   41.8 28.3 20.2   18.3 21.7 28.0 37.5 47.4 57.1 64.5 62.6 52.9   40.0
  Departure from Avegage   4.8 8.2 -0.6   -0.6 6.4 10.3 1.6 0.5 2.9 3.1 0.2 1.0   3.2
  Rank: Warm to Cold (123 yrs)   7 3 75   78 9 1 45 63 24 13 59 51   6
  Rank: Cold to Warm (123 yrs)   116 120 48   45 115 123 79 62 100 111 65 73   117
  Precipitation   0.71 0.88 1.23   1.60 1.37 1.07 1.73 1.76 0.35 1.02 0.89 1.50   14.11
  20th Century Average   1,09 0.83 0.82   0.80 0.83 1.06 1.58 1.78 1.27 1.10 0.95 1.08   13.19
  Percent of Average   65 106 150    200 165 101 109 99 28 93 94 139   107
  Rank: Dry to Wet (123 yrs)   38 71 103   119 116 52 45 56 12 62 64 99   85
  Rank: Wet to Dry (123 yrs)   85 52 20   4 8 72 79 68 112 62 60 25   38
    

Station Name:   Oct
2016
Nov
2016
Dec
2016
  Jan
2017
Feb
2017
Mar
2017
Apr
2017
May
2017
Jun
2017
Jul
2017
Aug
2017
Sep
2017
  Total for
WY 2016-17
 click on location   D0 D1                                
 for graph D2 D3 D4                                
Jeffrey City  None   0.50 0.31 0.72   0.84 1.51 0.98 1.80 1.37 0.22 0.73 0.35 1.58   10.94
  1981-2010 Normals   0.91 0.59 0.42    0.31  0.41 0.86  1.27 1.85 1.15 0.89  0.60  0.80    10.06
  Percent of Normal    55 53 171   271 368 114 142 74 19 82 58 198   109
Snowfall   0.0 6.0 8.0   14.0 18.0 1.0 14.0 11.0 0.0 0.0 0.0 T   72.0
1981-2010 Normals   7.3 6.6 5.5   4.6 6.7 9.4 10.2 4.9 0.4 0.0 0.0 1.4    57.0
  Percent of Normal    0 91 145   304 269 11 137 224 0 0 0 0    126

2016
Annual
2015-16
Water Year
2015 Annual 2014-15
Water Year
2014 Annual
2013-14
Water Year
2013 Annual 2012-13 Water Year 2012 Annual 2011-12 Water Year More...
Previous Annual and Water Year Climate Summaries
Wyoming Climate      |      Click on Image to Enlarge
Statewide averages and ranks for periods including October 2017 will be available on November 8, 2017*
* 2017 Climate Monitoring Release Dates

Wyoming: Last 3 Months

Precipitation - Percent of Normal Temperature - Departure from Normal
Wyoming: Last Three Months Percent of Normal Precipitation Wyoming: Last 3 Months Departure from Normal Temperature
 Statewide Average (inches) 4.07  Statewide Average (°F) 62.2
 20th Century Average 3.59  20th Century Average 60.7
 Rank - Driest  to Wettest  (123 Years) 92  Rank - Warmest  to Coldest (123 Years) 26
 Rank - Wettest to Driest (123 Years) 32  Rank - Coldest to Warmest (123 Years) 98
 Driest Period on Record: Jul - Sep 1964 1.65  Warmest Period on Record:  Jul - Sep 2001 64.8
 Wettest Period on Record: Jul - Sep 1923 7.19  Coldest Period on Record: Jul - Sep 1912 55.9

 

Wyoming:  2017

Precipitation - Percent of Normal Temperature - Departure from Normal
Wyoming: Current Year Percent of Normal Precipitation Wyoming: Current Year Departure from Normal Temperature
 Statewide Average (inches) 15.31  Statewide Average (°F) 46.6
 20th Century Average 12.70  20th Century Average 44.1
 Rank - Driest  to Wettest  (123 Years) 112  Rank - Warmest  to Coldest (123 Years) 12
 Rank - Wettest to Driest (123 Years) 12  Rank - Coldest to Warmest (123 Years) 112
 Driest Period on Record: Jan - Sep 1919 7.35  Warmest Period on Record:  Jan - Sep 2012 48.8

 Wettest Period on Record: Jan - Sep 1915, 1945

 16.47  Coldest Period on Record: Jan - Sep 1917 40.4

Last 5 Years (October 2012 - September 2017)

Precipitation - Percent of Normal Temperature - Departure from Normal
Map Not Available For This Period Map Not Available For This Period
 Statewide Average (inches) 86.89  Statewide Average (°F) 43.0
 20th Century Average 79.56  20th Century Average  40.7
 Rank - Driest  to Wettest  (118 Periods) 107  Rank - Warmest  to Coldest (118 Periods) 2
 Rank - Wettest to Driest  (118 Periods) 12  Rank - Coldest to Warmest (118 Periods) 117
 Driest Period on Record: Oct 1999 - Sep 2004 66.48  Warmest Period on Record: Oct 2011 - Sep 2016 43.2
 Wettest Period on Record: Oct 1994 - Sep 1999 94.28  Coldest Period on Record: Oct 1912 - Sep 1917 39.2