National Weather Service United States Department of Commerce

A November Arctic Blast

An early blast of cold arctic air will consume much of the eastern two-thirds of the U.S. over the next few days, making it feel like the middle of winter. Numerous record lows and record low maximum temperatures are expected through Wednesday, as temperatures average 20 to 30 degrees below normal. Read More >

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Wyoming Climate      |      Click on Image to Enlarge
Statewide averages and ranks for periods including Oct 2019 will be available on Nov 6, 2019*
* 2019 Climate Monitoring Release Dates

Wyoming: September 2019

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) 1.95  Statewide Average (°F) 41.3
 20th Century Average 1.77  20th Century Average 38.8
 Rank - Driest  to Wettest  (125 Years) 83 Rank - Warmest  to Coldest (125 Years) 32
 Rank - Wettest to Driest  (125 Years) 42  Rank - Coldest to Warmest (125 Years) 94
 Driest Month on Record:  April 1987 0.50   Warmest Month on Record: April 1915 46.0
 Wettest Year on Record: April 1900 4.10   Coldest Month on Record: April 1920 31.1

Wyoming: Water Year 2018-19 (October - September)

Precipitation - Percent of Normal Temperature - Departure from Normal
Wyoming: Water Year 2018-19 Percent of Normal Precipitation (Click to Enlarge) Wyoming: Water Year 201819 Departure from Normal Temperature
Climate Division:
Wyoming (Statewide Averages)
  Oct
2018
Nov
2018
Dec
2018
  Jan
2019
Feb
2019
Mar
2019
Apr
2019
May
2019
Jun
2019
Jul
2019
Aug
2019
Sep
2019
  Total for
WY2018-19
  Average Temperature   41.0 28.6 21.4   22.0 16.8 27.1 41.3             28.3
  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   28.7
  Departure from Average   -1.5 -0.4 0.8   3.6 -5.5 -2.0 2.5             -0.4
  Rank: Warm to Cold (125 yrs)   92 74 57   33 108 92 32             84
  Rank: Cold to Warm (125 yrs)   33 51 68   93 18 34 94             41
  Precipitation   1.29 1.31 0.76   0.90 1.40 1.25 1.95             8.86
  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   8.29
  Percent of Average   108 127 75   85 144 100 110             107
  Rank: Dry to Wet (125 yrs)   73 90 31   47 116 65 86             83
  Rank: Wet to Dry (125 yrs)   52 35 94   79 10 61 40             42
    
Maps and Statewide Averages for 3, 12 and 60 Months

Wyoming Climate Divisions: 2019

Wyoming Climate Divisions Map - Click to Enlarge

Climate Division 1 - Yellowstone Drainage
Climate Division:
Yellowstone (Division Averages)
  Oct
2018
Nov
2018
Dec
2018
  Jan
2019
Feb
2019
Mar
2019
Apr
2019
May
2019
Jun
2019
Jul
2019
Aug
2019
Sep
2019
  Total for
WY2018-19
  Average Temperature   37.1 24.0 18.2   20.4 15.2 24.7 36.2             25.1
  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   24.4
  Departure from average   -0.2 -0.6 1.3   5.2 -3.7 0.4 2.9             0.8
  Rank: Warm to Cold (125 yrs)   70 73 48   17 100 68 29             50
  Rank: Cold to Warm (125 yrs)   55 52 77   109 26 58 97             75
  Precipitation   1.97 3.07 1.76   2.30 5.66 1.52 3.60             19.88
  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    17.23
  Percent of Average   105 123 67   80 250 58 146             115
  Rank: Dry to Wet (125 yrs)   68 87 27   47 124 21 112             101
  Rank: Wet to Dry (125 yrs)   57 38 98   79 2 105 14             24
    

Station Name:   Oct
2018
Nov
2018
Dec
2018
  Jan
2019
Feb
2019
Mar
2019
Apr
2019
May
2019
Jun
2019
Jul
2019
Aug
2019
Sep
2019
  Total for
2018
 click on location   D0 D1                                
 for graph D2 D3 D4                                
Old Faithful None   2.11 1.49 1.05   1.78 6.40 0.60 3.87 1.60 2.25 0.62

1.09

2   24.86
  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    15.63
  Percent of Normal    127 65 33   84 322 27 175 57 153 40 75 137   159
Snowfall   7.1 23.0 22.0   29.3 91.0 4.0 9.0 T 5.0 0 0 0.6   191.0
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    197.9
  Percent of Normal    92 73 50   78 293 15 47 0. 417 0 0 43   97
                                 

Climate Division 2 - Snake Drainage
Climate Division:
Snake (Division Averages)
  Oct
2018
Nov
2018
Dec
2018
  Jan
2019
Feb
2019
Mar
2019
Apr
2019
May
2019
Jun
2019
Jul
2019
Aug
2019
Sep
2019
  Total for
WY2018-19
  Average Temperature   37.1 23.3 16.2   17.4 16.7 24.4 35.6             24.4
  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   23.9
  Departure from average   -0.3 -1.0 0.2   2.7 -1.6 0.8 2.6             0.5
  Rank: Warm to Cold (125 yrs)   72 80 60   39 83 59 28             74
  Rank: Cold to Warm (125 yrs)   53 45 65   87 43 67 98             51
  Precipitation   2.22 4.16 2.22   3.05 8.29 2.12 4.43             26.49
  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    23.36
  Percent of Average   105 125 60   70 231 61 158             113
  Rank: Dry to Wet (125 yrs)   68 86 27   33 122 24 117             87
  Rank: Wet to Dry (125 yrs)   57 39 98   93 4 102 9             38
   

v
Station Name:   Oct
2018
Nov
2018
Dec
2018
  Jan
2019
Feb
2019
Mar
2019
Apr
2019
May
2019
Jun
2019
Jul
2019
Aug
2019
Sep
2019
  Total for
WY2018-19
 click on location   D0 D1                                
 for graph D2 D3 D4                                
Afton None   1.93 1.84 1.31   1.61 2.08 2.69 2.78 4.86 1.35 0.54 0.2 3.88   25.07
  1981-2010 Normals   1.63 1.48 1.25   1.40 1.09 1.40 1.54 2.26 1.97 1.43 1.25 1.46   9.79
  Percent of Normal    118 124 105   115 191 192 181 215 69 38 16 266   256
Snowfall   T 13.5 19.0   17.9 22.1 17.6 1.9 3.3 T T 0 0   92.0
                                 
Moose None   1.08 2.82 1.21   1.56 7.83 0.78 3.04 1.50 0.98 2.14 0.41 3.17   26.52
  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    14.29
  Percent of Normal    73 107 45   60 430 48 204 80 61 166 32 220   186
Snowfall   T 27.0 9.2   M 79.2 8.0 16.7 0.2 T 0 0 0    140.3*
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    160.4
  Percent of Normal    0 112 21   M 298 50 226 9 0 0 0 0   87*
                                *Missing Data
JHMR MId Mtn None                                
Snowfall   9.0 52.0 62.0   72.0 167.0 30.0 34.0 7 6 0 0 0.1   439.1
1975-2018 Average   16.0 34.0 76.0   82.0 65.0 56.0 21.0 13.0 2.0 0.0 0.0 1.0    366.0
  Percent of Normal    56 153 82    88 246 55 162 54 300 0 0 10   120
                                 

Climate Division 3 - Green and Bear Drainages
Climate Division:
Green and Bear (Division Averages)
  Oct
2018
Nov
2018
Dec
2018
  Jan
2019
Feb
2019
Mar
2019
Apr
2019
May
2019
Jun
2019
Jul
2019
Aug
2019
Sep
2019
  Total for
WY2018-19
  Average Temperature   39.9 26.9 16.8   17.4 16.4 24.3 39.7             25.9
  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   26.6
  Departure from average   -0.8 -0.1 -1.5   1.2 -3.3 -2.7 2.7             -0.6
  Rank: Warm to Cold (125 yrs)   84 68 81   55 97 100 29             86
  Rank: Cold to Warm (125 yrs)   41 57 44   71 29 26 97             39
  Precipitation   1.79 1.23 0.67   1.09 1.46 1.34 1.89             9.47
  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    7.97
  Percent of Average   154 119 65   95 138 115 138             119
  Rank: Dry to Wet (125 yrs)   105 81 31   70 104 94 102             103
  Rank: Wet to Dry (125 yrs)   20 44 94   56 22 32 24             22
    

v v v
Station Name:   Oct
2018
Nov
2018
Dec
2018
  Jan
2019
Feb
2019
Mar
2019
Apr
2019
May
2019
Jun
2019
Jul
2019
Aug
2019
Sep
2019
  Total for
WY2018-19
 click on location   D0 D1                                
 for graph D2 D3 D4                                
Big Piney Airport None   0.59 0.08 0.10   0.11 0.05 0.15 0.12 0.25 0.09 T T 1.1   2.64
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    111 38 33   35 14 34 23 30 11 0 0 141   41
                                 
Evanston Airport D0   2.18 0.64 0.36   0.41 0.23 0.50 1.47 1.32 0.19 0.04 T 1.11   8.45
  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    186 62 62   76 38 58 128 75 15 4 0 85   70
                                 
Rock Springs Arpt. None   1.05 0.25 0.12   0.24 0.14 0.21 1.00 0.79 0.21 0.02 0.49 0.6   5.12
 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    121 51 24   53 29 31 110 65 27 3 79 65   60
                                 
Bitter Creek 4NE None   1.11 0.47 0.31   0.23 0.50 0.42 0.16 M 0.58 0.12 0.38 1.54   5.82
  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    1.68 152 61   82 139 140 25 M 83 20 51 211   84
                                *Missing Data 
Fossil Butte N.M. None   1.96 1.24 0.42   1.42 1.00 1.89 2.06 3.83 1.08 0.73 0.16 1.95   17.74
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
  Percent of Normal    177 144 57   290 147 230 210 272 105 86 17 177   161
Snowfall   4.0 19.7 7.6   M 16.5 22.0 6.7 4.4 T T 0 T    80.9*
                                 *Missing Data
Green River None   1.90 1.10 0.85   1.25 0.68 1.04 3.54 2.10 0.53 0.1 0.42 1.63   15.14
  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   235 268 193   368 158 146 416 171 54 18 62 181   182
Snowfall   5.5 10.6 8.5   16.8 9.5 12.6 5.5 T T 0 0 0    68.5
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   31.6
Percent of Normal   1100 279 131   365 130 252 128 0 0 0 0 0    213
                                 
Rock Springs  None   2.18 1.32 0.31   1.14 0.38 0.73 2.78 2.11 0.38 0.23 0.8 1.07   13.43
  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    200 254 60   259 83 109 305 149 44 32 83 99   139
Snowfall   2.5 9.2 7.1   22.1 16.1 11.5 2.0 T 0 0 0 0    57.8
                                 

Climate Division 4 - Big Horn Drainage
Climate Division:
Big Horn (Division Averages)
  Oct
2018
Nov
2018
Dec
2018
  Jan
2019
Feb
2019
Mar
2019
Apr
2019
May
2019
Jun
2019
Jul
2019
Aug
2019
Sep
2019
  Total for
WY2018-19
  Average Temperature   41.8 29.3 22.1   23.7 15.7 28.6 42.4             29.1
  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   29.0
  Departure from average   -0.8 0.1 1.5   6.0 -7.0 -1.6 2.6             0.1
  Rank: Warm to Cold (125 yrs)   78 66 57   21 113 91 30             66
  Rank: Cold to Warm (125 yrs)   47 59 68   105 13 35 96             59
  Precipitation   0.86 1.32 0.68   0.65 0.96 0.75 1.54             6.76
  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   7.50
  Percent of Average   75 139 78   71 128 67 88             90
  Rank: Dry to Wet (125 yrs)   46 98 54   39 92 29 61             43
  Rank: Wet to Dry (125 yrs)   79 27 71   87 34 97 65             82
    

Station Name:   Oct
2018
Nov
2018
Dec
2018
  Jan
2019
Feb
2019
Mar
2019
Apr
2019
May
2019
Jun
2019
Jul
2019
Aug
2019
Sep
2019
  Total for
WY2018-19
 click on location   D0 D1                                
 for graph D2 D3 D4                                
Greybull Airport   D0   0.08 0.35 0.12   0.04 0.11 0.02 0.49 2.07 0.74 0.55 0.09 3.21   7.87
  1981-2010 Normals    0.60  0.30  0.28    0.23  0.18  0.40  0.71  1.65  1.20  0.66  0.42  0.88    7.51
  Percent of Normal    13 117 43   17 61 5 69 125 62 83 21 365   105
                                 
Worland Airport None   0.13 0.48 T   0.07 0.05 0.57 0.60 4.96 0.43 0.81 1 2.07   11.17
  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    19 137 0   30 26 124 70 349 37 114 233 244   148
                                 
Cody  D0   0.80 0.84 0.25   0.13 0.68 0.12 1.16 6.6 0.74 1.06 0.73 3.19   16.92
  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    90 175 76    39 206 21 109 363 44 95 80 301   160
Snowfall   2.0 9.5 3.6   2.2 8.9 3.0 0.6 T 0 0 0 T   29.80
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    47 151 45   28 133 43 10 0 0 0 0 1   63
                                 
Powell Field Station   D0   0.13 0.14 0.12   0.05 0.19 0.01 0.11 2.79 1.24 1.51 0.58 2.7   9.57
  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    6.8
  Percent of Normal    23 78 92   24 146 3 22 199 92 174 112 415   141
Snowfall   0.5 0.5 1.8   2.1 4.2 1.0 0.0 0.2 0 0 0 0   10.3
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   10.0
  Percent of Normal    42 38 150   91 840 40 0 40 0 0 0 0    103
                                 
Thermopolis None   0.43 1.22 0.48   0.21 0.13 0.85 1.67 6.33 1.01 0.48 0.29 2.28   16.36
  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    34 153 104   60 29 98 114 340 67 55 50 158   140
Snowfall   0.0 13.0 9.5   3.0 2.0 4.5 T 0.4 0 T 0 0   32.4
1981-2010 Normals   3.7 4.5  5.6    4.6 2.5 2.8 0.4 0.0 0.0 0.0 0.2 2.4   26.7
  Percent of Normal    0 351 211   54 43 180 0 0 0 0 0 0   121

Climate Division 5 - Powder and Tongue Drainages
Climate Division:
Powder and Tongue
(Division Averages)
  Oct
2018
Nov
2018
Dec
2018
  Jan
2019
Feb
2019
Mar
2019
Apr
2019
May
2019
Jun
2019
Jul
2019
Aug
2019
Sep
2019
  Total for
WY2018-19
  Average Temperature   42.4 31.1 25.3   25.4 13.1 28.3 42.7             27.9
  20th Century Average   44.6 31.0 22.3   19.6 23.8 31.1 41.2 50.8 60.2 68.2 66.5 55.9   28,7
  Departure from average   -2.2 0.1 3.0   5.8 -10.7 -2.8 1.5             -0.9
  Rank: Warm to Cold (125 yrs)   94 66 35   24 120 94 42             88
  Rank: Cold to Warm (125 yrs)   31 59 90   102 6 32 84             37
  Precipitation   1.26 0.80 0.81   0.52 0.40 0.66 1.71             6.16
  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   6.72
  Percent of Average   109 104 125   83 66 63 92             92
  Rank: Dry to Wet (125 yrs)   78 73 91   54 30 23 67             49
  Rank: Wet to Dry (125 yrs)   47 52 34   72 96 103 59             76
    

Station Name:   Oct
2018
Nov
2018
Dec
2018
  Jan
2019
Feb
2019
Mar
2019
Apr
2019
May
2019
Jun
2019
Jul
2019
Aug
2019
Sep
2019
  Total for
WY2018-19
 click on location   D0 D1                                
 for graph D2 D3 D4                                
Buffalo Airport D0   1.10 0.38 0.10   0.09 0.04 0.07 1.63 5.99 2.02 2.79 1.05 1.98   17.24
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    118 70 25   21 11 8 125 237 89 168 130 151   128
                                 
Sheridan Arpt D0   1.69 0.83 0.32   0.70 0.37 0.44 1.86 6.34 1.35 1.4 0.72 1.88   17.9
  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    120 117 57   125 69 45 116 270 64 119 100 131   126
                                 
Kaycee None   1.31 0.43 0.54   0.25 0.12 1.06 2.26 6.08 0.21 1.44 0.04 1.18   14.92
  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    126 75 174   83 35 143 155 257 11 101 5 100   121
Snowfall   5.0 6.0 10.0   4.0 3.5 4.6 1.5 6 0 0 0 0.2   40.8
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    333 143 167   68 56 58 32 1000 0 0 0 100   109
                                 

Climate Division 6 - Belle Fourche Drainage
v
Climate Division:
Belle Fourche (Division Averages)
  Oct
2018
Nov
2018
Dec
2018
  Jan
2019
Feb
2019
Mar
2019
Apr
2019
May
2019
Jun
2019
Jul
2019
Aug
2019
Sep
2019
  Total for
WY2018-19
  Average Temperature   41.3 30.5 24.9   24.4 9.6 26.6 42.8             28.6
  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   30.3
  Departure from average   -3.7 -0.5 2.8   5.4 -13.5 -4.0 1.4             -1.7
  Rank: Warm to Cold (125 yrs)   106 70 41   30 123 99 45             107
  Rank: Cold to Warm (125 yrs)   19 55 84   96 3 27 81             18
  Precipitation   1.17 0.68 1.21   0.59 0.58 0.90 2.06             7.19
  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   6.38
  Percent of Average   103 99 189   100 98 92 118             113
  Rank: Dry to Wet (125 yrs)   81 74 116   72 64 59 83             86
  Rank: Wet to Dry (125 yrs)   44 51 9   54 62 67 43             39
    

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Station Name:   Oct
2018
Nov
2018
Dec
2018
  Jan
2019
Feb
2019
Mar
2019
Apr
2019
May
2019
Jun
2019
Jul
2019
Aug
2019
Sep
2019
  Total for
WY2018-19
 click on location   D0 D1                                
 for graph D2 D3 D4                                
Gillette Airport None   1.01 0.69 0.64   0.34 0.28 0.47 2.22 5.16 2.16 1.86 1.72 1.31   17.86
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    80 125 160   87 72 49 151 211 98 112 181 110   129
                                 

Climate Division 7 - Cheyenne and Niobrara Drainages
v v
Climate Division: Cheyenne and Niobrara
(Division Averages)
  Oct
2018
Nov
2018
Dec
2018
  Jan
2019
Feb
2019
Mar
2019
Apr
2019
May
2019
Jun
2019
Jul
2019
Aug
2019
Sep
2019
  Total for
WY2018-19
  Average Temperature   42.6 30.9 25.6   25.2 13.6 28.5 44.1             30.1
  20th Century Average   45.8 31.8 23.0   20.3 24.6 32.1 42.5 52.4 62.5 70.3 68.4 57.6   31.4
  Departure from average   -3.2 -0.9 2.6   4.9 -11.0 -3.6 1.6             -1.4
  Rank: Warm to Cold (125 yrs)   103 77 39   28 120 97 42             100
  Rank: Cold to Warm (125 yrs)   22 48 86   98 6 29 84             25
  Precipitation   0.83 0.72 0.83   0.36 0.40 0.88 1.45             5.47
  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   5.30
  Percent of Average   87 131 173   86 87 116 86             103
  Rank: Dry to Wet (125 yrs)   59 95 114   52 59 83 54             67
  Rank: Wet to Dry (125 yrs)   66 30 11   74 67 43 72             58
    

Climate Division 8 - Lower Platte Drainage
Climate Division:
Lower Platte (Division Averages)
  Oct
2018
Nov
2018
Dec
2018
  Jan
2019
Feb
2019
Mar
2019
Apr
2019
May
2019
Jun
2019
Jul
2019
Aug
2019
Sep
2019
  Total for
WY2018-19
  Average Temperature   43.0 31.5 26.0   26.6 22.1 29.4 43.6             31.7
  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   32.0
  Departure from Average   -2.2 -0.8 1.3   3.8 -3.8 -2.7 2.4             -0.3
  Rank: Warm to Cold (125 yrs)   98 80 54   34 101 96 34             76
  Rank: Cold to Warm (125 yrs)   27 45 71   92 25 30 92             49
  Precipitation   0.91 1.05 0.34   0.52 0.32 1.84 1.41             6.38
  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   6.33
  Percent of Average   87 154 54   102 54 190 74             101
  Rank: Dry to Wet (125 yrs)   54 108 28   55 23 115 47             65
  Rank: Wet to Dry (125 yrs)   71 17 97   71 103 11 79             60
    

Station Name:   Oct
2018
Nov
2018
Dec
2018
  Jan
2019
Feb
2019
Mar
2019
Apr
2019
May
2019
Jun
2019
Jul
2019
Aug
2019
Sep
2019
  Total for
WY2018-19
 click on location   D0 D1                                
 for graph D2 D3 D4                                
Casper Airport   None   1.69 0.94 0.40   0.28 0.50 1.74 1.28 3.62 0.96 0.74 0.17 1.41   13.73
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    152 124 82   55 88 212 99 179 60 52 20 131   110
Snowfall   7.1 11.3 6.9   4.9 9.0 27.4 5.7 6.2 0 0 0 0   78.5
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    96 110 63   54 92 251 49 214 0 0 0 0    105
                                 
Cheyenne Arpt None   0.69 0.94 0.28   0.32 0.33 2.38 1.54 5.19 2.74 1.37 0.45 0.51   16.74
  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    74 159 57   97 70 227 87 222 117 63 23 34   105
Snowfall   5.4 10.7 5.0   4.4 4.5 23.3 16.5 12.4 T T T T   82.2
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    108 134 60   75 57 206 162 539 0 0 0 0   136
                                 

Climate Division 9 - Wind River Drainage
Climate Division:
Wind River (Division Averages)
  Oct
2018
Nov
2018
Dec
2018
  Jan
2019
Feb
2019
Mar
2019
Apr
2019
May
2019
Jun
2019
Jul
2019
Aug
2019
Sep
2019
  Total for
WY2018-19
  Average Temperature   40.3 27.1 19.5   19.8 17.4 28.1 41.0             27.6
  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   28.0
  Departure from average   -1.5 -0.8 0.0   2.5 -4.6 -0.9 2.7             -0.4
  Rank: Warm to Cold (125 yrs)   88 77 68   45 103 81 33             87
  Rank: Cold to Warm (125 yrs)   37 48 57   81 23 45 93             38
  Precipitation   0.99 1.18 0.58   0.66 1.12 1.03 2.24             7.80
  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   7.89
  Percent of Average   82 123 69   71 138 82 119             99
  Rank: Dry to Wet (125 yrs)   55 86 30   42 103 47 90             66
  Rank: Wet to Dry (125 yrs)   70 39 95   84 23 79 36             59
    

v
Station Name:   Oct
2018
Nov
2018
Dec
2018
  Jan
2019
Feb
2019
Mar
2019
Apr
2019
May
2019
Jun
2019
Jul
2019
Aug
2019
Sep
2019
  Total for
WY2018-19
 click on location   D0 D1                                
 for graph D2 D3 D4                                
Lander Airport  None   1.10 0.88 0.58   0.80 0.33 1.68 2.66 5.49 0.19 0.43 0.46 1.48   16.08
  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    85 102 100   195 57 145 142 250 15 55 75 141   127
Snowfall   6.8 11.7 6.8   12.8 4.0 20.0 11.0 7.9 0 0 0 0   81
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    69 89 67   168 39 124 65 165 0 0 0 0   89
                                 
Riverton Airport   None   0.44 0.64 0.17   0.19 0.22 0.77  2.12 4.23 0.16 0.2 0.05 1.8   10.99
  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    49 128 53   79 81 140 163 246 13 22 9 200   117
Snowfall    3.8 9.3 3.0   3.4 3.7 11.0 7.9 7 0 0 0 0   45.3
                                 
Dubois   None   0.81 0.80 0.25   0.12 0.49 0.52 1.08 3.04 2.03 0.66 1.24 3.65   14.85
  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    100 140 89   50 129 130 98 185 159 59 144 294   150
Snowfall   1.8 15.5 5.7   3.7 11.4 8.0 3.5 9.9 T 0 0 T   59.5
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    60 267 112   95 200 133 41 254 0 0 0 0   132
                                 
Riverton  None   0.79 0.60 0.23   0.23 0.22 0.95 2.03 3.82 0.28 0.4 0.11 1.88   11.54
  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    93 146 96   82 67 170 207 263 23 51 22 227   137
Snowfall   6.5 9.0 4.2   3.7 3.9 11.0 4.4 11.8 0 0 0 T   54.5
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    176 209 88   77 65 186 72 983 0 0 0 0   147

Climate Division 10 - Upper Platte Drainage
Climate Division:
Upper Platte (Division Averages)
  Oct
2018
Nov
2018
Dec
2018
  Jan
2019
Feb
2019
Mar
2019
Apr
2019
May
2019
Jun
2019
Jul
2019
Aug
2019
Sep
2019
  Total for
WY2018-19
  Average Temperature   40.5 27.7 20.4   20.5 20.1 26.9 40.8             28.1
  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   28.0
  Departure from average   -1.3 -0.6 0.2   2.2 -1.6 -1.1 3.3             0.1
  Rank: Warm to Cold (125 yrs)   85 81 64   44 84 80 26             68
  Rank: Cold to Warm (125 yrs)   40 44 61   82 42 46 100             57
  Precipitation   1.25 1.17 0.45   0.85 0.81 1.50 1.81             7.84
  20th Century Average   1.09 0.83 0.82   0.80 0.83 1.06 1.58 1.78 1.27 1.10 0.93 1.08   7.01
  Percent of Average   115 141 55   106 98 142 115             112
  Rank: Dry to Wet (125 yrs)   77 105 21   78 66 110 84             87
  Rank: Wet to Dry (125 yrs)   48 20 104   48 60 16 42             38
    

Station Name:   Oct
2018
Nov
2018
Dec
2018
  Jan
2019
Feb
2019
Mar
2019
Apr
2019
May
2019
Jun
2019
Jul
2019
Aug
2019
Sep
2019
  Total for
WY2018-19
 click on location   D0 D1                                
 for graph D2 D3 D4                                
Jeffrey City  None   1.42 0.29 0.32   0.50 0.17 0.95 2.65 3.11 1.95 0.26 0.22 1.16   13
  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    156 49 76   161 41 110 209 168 170 29 37 145   129
Snowfall   7.0 3.5 4.0   7.0 3.0 12.1 8.0 8.3 0 0 0 0   52.9
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
  Percent of Normal    96 53 73   152 45 129 78 169 0 0 0 0   93

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Previous Annual and Water Year Climate Summaries
Wyoming Climate      |      Click on Image to Enlarge
Statewide averages and ranks for periods including May 2019 will be available on June 6, 2019*
* 2019 Climate Monitoring Release Dates

Wyoming: 2019

Precipitation - Percent of Normal Temperature - Departure from Normal
Wyoming: 2019 Percent of Normal Precipitation Wyoming: 2019 Departure from Normal Temperature
 Statewide Average (inches) 5.50  Statewide Average (°F) 26.8
 20th Century Average 5.06  20th Century Average 27.1
 Rank - Driest  to Wettest  (125 Years) 87  Rank - Warmest  to Coldest (125 Years) 75
 Rank - Wettest to Driest (125 Years) 39  Rank - Coldest to Warmest (125 Years) 51
 Driest Period on Record: Jan - Apr 1910 3.29  Warmest Period on Record: Jan - Apr 1992 33.5
 Wettest Period on Record: Jan - Apr 2017 8.36  Coldest Period on Record: Jan - Apr 1917 21.0

 

Wyoming: Last 12 Months

Precipitation - Percent of Normal Temperature - Departure from Normal
Wyoming: Last 12 Months Percent of Normal Precipitation Wyoming: Last 12 Months Departure from Normal Temperature
 Statewide Average (inches) 16.67  Statewide Average (°F) 41.6
 20th Century Average 15.91  20th Century Average 40.7
 Rank - Driest  to Wettest  (125 Years) 78  Rank - Warmest  to Coldest (125 Years) 39
 Rank - Wettest to Driest (125 Years) 47  Rank - Coldest to Warmest (125 Years) 86
 Driest Period on Record: May 2012 - Apr 2013 11.10  Warmest Period on Record:   May 1933 - Apr 1934 44.7

 Wettest Period on Record: May 1998 - Apr 1999

20.53  Coldest Period on Record:  May 1916 - Apr 1917 36.5

Last 5 Years (May 2014 - April 2019)

Precipitation - Percent of Normal Temperature - Departure from Normal
Map Not Available For This Period Map Not Available For This Period
 Statewide Average (inches) 86.60  Statewide Average (°F) 43.0
 20th Century Average 79.48  20th Century Average 40.7
 Rank - Driest  to Wettest  (120 Periods) 106  Rank - Warmest  to Coldest (120 Periods) 4
 Rank - Wettest to Driest  (120 Periods) 15  Rank - Coldest to Warmest (120 Periods) 117
 Driest Period on Record: May 1999 - Apr 2004 66.45  Warmest Period on Record: May 2012 - Apr 2017 43.2
 Wettest Period on Record: May 1994 - Apr 1999 91.17  Coldest Period on Record: May 1912 - Apr 1917 39.1