National Weather Service United States Department of Commerce

Unsettled Weather Returns to the Southwest; Moderating Temperatures Over the East

A large area of high pressure will bring mainly quiet weather to much of the South and East Coast through Saturday with gradually moderating temperatures. Meanwhile, rain and mountain snow will develop across the Southwest U.S., along with the risk of a few thunderstorms. Precipitation will also slowly expand into the Great Basin, Sierra Nevada, and Colorado Rockies. Read More >

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Previous Annual and Water Year Climate Summaries
Click on Images to Enlarge
Note: Drought Classifications listed are from the October 20, 2016 Drought Monitor
 

Wyoming: Water Year 2015-16 (Oct-Sep)

Climate Division:
Wyoming (Statewide Averages)
  Oct
2015
Nov
2015
Dec
2015
  Jan
2016
Feb
2016
Mar
2016
Apr
2016
May
2016
Jun
2016
Jul
2016
Aug
2016
Sep
2016
  Total for
Water Year
  Average Temperature   48.7 29.2 21.3   22.7 29.9 34.4 41.8 47.8 63.8 66.6 63.4 55.3   43.7
  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   40.8
  Departure from Avegage   6.2 0.2 0.7   4.3 7.6 5.3 3.0 -0.6 6.2 1.3 0.0 1.7   3.0
  Rank: Warm to Cold (122 yrs)   2 58 63    24 4 13 26 70 2 39 64  37   5
  Rank: Cold to Warm (122 yrs)   120 64 64    98 119 110 97 53 121 84 59 86   117
  Precipitation   1.11 1.09 1.11    0.87  0.81 2.00 2.52 2.50 0.68 0.69 0.84 2.04    16.26
  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   93 106 110    82 84 160 142 113 37 54 79 165   102
  Rank: Dry to Wet (122 yrs)   54 72 72   43 42 112 110 86 9 10 43 108   66
  Rank: Wet to Dry (122 yrs)   68 50 50   79 81 11 13 37 114 113 80 15   56
    

Wyoming Climate Divisions: Water Year 2015-16 (Oct-Sep)

Wyoming Climate Divisions Map - Click to Enlarge

Climate Division 1 - Yellowstone Drainage
Climate Division:
Yellowstone (Division Averages)
  Oct
2015
Nov
2015
Dec
2015
  Jan
2016
Feb
2016
Mar
2016
Apr
2016
May
2016
Jun
2016
Jul
2016
Aug
2016
Sep
2016
  Total for
Water Year
  Average Temperature   43.9 23.4 18.4   21.7 26.2 29.3 39.2 43.9 56.3 58.2 57.3 49.0   38.9
  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   6.6 -1.2 1.5   6.4 7.3 5.0 5.9 1.5 6.0 0.3 1.1 1.6   3.5
  Rank: Warm to Cold (122 yrs)   1 80 45    8 5 13 7 34 4 62 41 37   4
  Rank: Cold to Warm (122 yrs)   121 42 77    114 118 110 116 89 119 64 82 86   118
  Precipitation   2.21 2.81 3.40    1.80  1.58 2.65 1.83 2.50 1.02 1.17 0.47 2.33    23.77
  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   118 113 129    62 70 102 74 86 40 73 31 129   86
  Rank: Dry to Wet (122 yrs)   79 75 98   34 31 63 32 53 8 41 9 86   21
  Rank: Wet to Dry (122 yrs)   43 47 24   88 92 60 91 70 115 82 114 37   101
    

Station Name: Drought
Conditions
  Oct
2015
Nov
2015
Dec
2015
  Jan
2016
Feb
2016
Mar
2016
Apr
2016
May
2016
Jun
2016
Jul
2016
Aug
2016
Sep
2016
  Total for
Water Year
 click on location   D0 D1                                
 for graph D2 D3 D4                                
Old Faithful D0   1.21 2.49 3.07   1.27 1.15 1.83 1.31 2.07 0.67 1.64 0.77 2.96   20.44
  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    73 109 97    60 58 83 59 74 27 106 53 203   81
Snowfall   T 20.5 47.5    27.8  11.3 29.3 2.0 T 0 0 0 3.5    141.9
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    0 65 108    74 36 109 10 0 0 0 0 250   68
                                 

Climate Division 2 - Snake Drainage
Climate Division:
Snake (Division Averages)
  Oct
2015
Nov
2015
Dec
2015
  Jan
2016
Feb
2016
Mar
2016
Apr
2016
May
2016
Jun
2016
Jul
2016
Aug
2016
Sep
2016
  Total for
Water Year
  Average Temperature   42.9 22.5 16.3   19.0 24.1 27.9 37.5 42.7 54.6 57.6 56.4 48.6   37.5
  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   5.5 -1.8 0.3   4.3 5.8 4.3 4.5 0.4 4.6 -0.1 0.4 1.1   2.4
  Rank: Warm to Cold (122 yrs)   2 84 57    23 12 16 11  51 7  70 54 45   6
  Rank: Cold to Warm (122 yrs)   120 38 65    99 111 107 112 72 116 53 69 78   116
  Precipitation   2.29 3.16 4.62    3.60  2.19 4.31 2.19 3.26 0.97 0.69 0.45 3.22   30.95
  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   108 95 124    83 61 125 78 112 44 52 31 182   93
  Rank: Dry to Wet (122 yrs)   69 61 91   53 28 92 32 79 20 19 10 109   44
  Rank: Wet to Dry (122 yrs)   53 61 31   69 95 31 91 44 103 104 113 14   78
    

v
Station Name:
 
Drought
Conditions
  Oct
2015
Nov
2015
Dec
2015
  Jan
2016
Feb
2016
Mar
2016
Apr
2016
May
2016
Jun
2016
Jul
2016
Aug
2016
Sep
2016
  Total for
Water Year
 click on location   D0 D1                                
 for graph D2 D3 D4                                
Afton  None   0.63 1.32 1.02   1.57 0.84 2.11 1.75 3.80 0.40 0.41 0.12 3.68   17.65
  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    39 89 82   112 77 151 114 168 20 29 10 252   97
Snowfall   0.0 15.3 20.2    27.8 14.5 23.0 1.4 0.3 0.0 0.0 0.0 0.6   103.1
                                 
Moose None   1.94 2.11 3.93   3.02 0.83 2.28 1.00 1.57 0.69 0.75 0.18 2.37    20.67
  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    132 80 147   117  46 141 67 84 43 58 14 165   95
Snowfall   0.1 17.8 42.8    56.5  5.1 24.1 T 0.0 0.0 0.0 0.0 0.0    146.4
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    2 74 96    153 19 152 0 0 0 0 0 0   90
                                 
JHMR MId Mtn   None                                
Snowfall   3.0 41.0 79.0    94.0 37.0 71.0 6.0 3.0       0.0    334.0
1975-2015 Average   16.0 33.0 75.0   81.0 64.0 55.0 19.0 14.0       1.0    358.0
  Percent of Normal    19 124 105    116 58 129 32 21       0   93
                                 

Climate Division 3 - Green and Bear Drainages
Climate Division:
Green amd Bear (Division Averages)
  Oct
2015
Nov
2015
Dec
2015
  Jan
2016
Feb
2016
Mar
2016
Apr
2016
May
2016
Jun
2016
Jul
2016
Aug
2016
Sep
2016
  Total for
Water Year
  Average Temperature   47.3 26.4 17.5   18.1 26.4 32.0 40.2 45.8 61.0 63.8 61.0 53.2   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   6.6 -0.6 -0.8   1.9 6.7 5.0 3.2 -0.8 5.7 1.0 0.2 1.6   2.5
  Rank: Warm to Cold (122 yrs)   2 71 73    47 9 15 25  79 3  41 58 32   7
  Rank: Cold to Warm (122 yrs)   120 51 49    75 114 108 98 44 120 82 65 91   115
  Precipitation   0.80 1.04 1.13    1.08  0.71 1.78 1.90 3.43 0.54 0.34 0.54 2.01    15.30
  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   69 101 110    94 67 152 139 221 47 36 54 183   112
  Rank: Dry to Wet (122 yrs)   40 64 72   47 25 109 101 117 30 6 31 106   88
  Rank: Wet to Dry (122 yrs)   82 58 50   75 98 14 22 6 93 117 92 17   34
    

Station Name: Drought
Conditions
  Oct
2015
Nov
2015
Dec
2015
  Jan
2016
Feb
2016
Mar
2016
Apr
2016
May
2016
Jun
2016
Jul
2016
Aug
2016
Sep
2016
  Total for
Water Year
 click on location   D0 D1                                
 for graph D2 D3 D4                                
Big Piney Airport  None   0.71 0.42 0.11   0.04 0.13 0.82 1.07 3.99 0.73 0.25 0.45 1.56   10.28
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    134 200 37    13 37 186 202 475 92 35 65 200    159
                                 
Evanston Airport   None   0.42 0.16 0.41   0.30 0.02 0.25 0.76 2.07 0.29 T 0.18 1.85   6.71
  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    36 15 71    56 3 29 66 117 23 0 19 141    55
                                 
Rock Springs Arpt.  None   0.15 0.17 0.04   0.03 0.19 0.56 1.48 2.20 0.21 0.30 0.20 1.59   7.12
 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    17 35 8    7  40 82 163 182 27 47 32 173    83
                                 
Bitter Creek 4NE None   0.32 0.38 0.34   0.37 0.37 0.89 1.12 2.00 0.26 0.49 0.31 1.82   8.67
  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    48 123 67    132 103 297 172 183 37 82 41 249    125
                                 
Fossil Butte
National Monument
  None   0.91 0.72 1.26    0.90 0.54 1.66 1.51 4.66 0.38 T 0.47 1.43    14.44
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    82 84  170   184 79 202 154 330 37 0 515 130    131
Snowfall   T 7.6 19.5    16.5 9.8 19.4 0.5 1.3 0.0 0.0 0.0 1.0    75.6
                                 
Green River None   0.38 1.18 1.00   0.85 0.57 1.63 2.22 3.76 0.68 0.18 0.79 2.08   15.32
  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    47 288 227   250 133 230 261 306 69 33 116 231    184
Snowfall   0.0 9.5  10.3   9.4 7.6 13.3 6.5 T 0.0 0.0 0.0 0.0    56.6
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   0 250 158   204 104 266 167 0 0 0 0 0    176
                                 
Rock Springs  None   0.27 0.65 0.96   0.39 0.32 1.69 4.16 3.40 0.39 0.06 0.33 2.32    14.94
  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    25 125 185   89 70 252 457 239 45 8 34 215    155
Snowfall   0.0 7.0  11.2   5.4 4.1 13.5 3.0 0.0 0.0 0.0 0.0 0.0    44.2
                                 

Climate Division 4 - Big Horn Drainage
Climate Division:
Big Horn (Division Averages)
  Oct
2015
Nov
2015
Dec
2015
  Jan
2016
Feb
2016
Mar
2016
Apr
2016
May
2016
Jun
2016
Jul
2016
Aug
2016
Sep
2016
  Total for
Water Year
  Average Temperature   49.0 29.3 22.1   24.6 31.8 35.3 43.4 49.4 64.5 66.6 64.4 55.1   44.6
  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   6.4 0.1 1.5   6.9 9.1 5.1 3.6 0.3 6.4 0.8 0.7 1.6   3.5
  Rank: Warm to Cold (122 yrs)   2 64 56    14 4 16 20 56 3 53  50  42   4
  Rank: Cold to Warm (122 yrs)   120 58 66    108 119 107 103 67 120 70 73 81   118
  Precipitation   1.15 1.05 0.83   0.45 0.59 1.72 2.44 2.07 0.58 0.58 0.72 2.75    14.93
  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   101 111 95    49 79 154 139 93 30 51 77 210   99
  Rank: Dry to Wet (122 yrs)   68 73 67   19 45 104 101 63 8 25 53 112   56
  Rank: Wet to Dry (122 yrs)   54 49 55   103 78 19 22 60 115 98 73 11   66
    

Station Name:
 
Drought
Conditions
  Oct
2015
Nov
2015
Dec
2015
  Jan
2016
Feb
2016
Mar
2016
Apr
2016
May
2016
Jun
2016
Jul
2016
Aug
2016
Sep
2016
  Total for
Water Year
 click on location   D0 D1                                
 for graph D2 D3 D4                                
Greybull Airport   D0   0.24 0.25 0.01   0.11 T 0.36 0.46 1.36 0.17 0.09 0.33 2.76   6.14
  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    40 83 4    48 0 90 65 82 14 14 79 314   82
                                 
Worland Airport None   0.33 0.68 0.28   0.03 T 0.97 1.34 1.42 0.29 0.15 0.27 1.97   7.73
  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    6.72
  Percent of Normal    48 194 122    13 0 211 156 100 25 21 63 232    115
                                 
Cody  D0   1.86 0.47 0.50   0.10 0.03 0.80 2.86 1.68 0.26 1.01 0.62 2.14   12.33
  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    209 98 152    30 9 143 270 92 15 91 68 202    117
Snowfall   0.0 4.9 4.1    1.6  T 2.3 0.0 0.0 0.0 0.0 0.0 0.0   12.9
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 78 51    21 0 33 0 0 0 0 0 0    27
                                 
Powell Field Station   D0   0.88 0.18 0.11   0.00 0.00 0.26 0.61 1.42 0.26 0.50 0.24 1.58    6.04
  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    157 100 85    0  0 90 120 101 19 57 46 243   89
Snowfall   0.0  2.0 0.6    0.0  0 T 0.0 0.0 0.0 0.0 0.0 0.0   2.6
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    0 154 50    0 0 0 0 0 0 0 0 0    26
                                 
Thermopolis   None   1.25 0.82 0.55   0.10 0.25 2.52 3.32 1.30 0.02 0.02 0.72 3.16   14.03
  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    99 103 120    29 56 290 227 70 1 2 124 257    120
Snowfall   0.0  5.0  13.0    1.5 5.0 2.0 0.0 0.0 0.0 0.0 0.0 0.0    26.5
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    0 135 289    27 109 80 0 0 0 0 0 0   99

Climate Division 5 - Powder and Tongue Drainages
Climate Division:
Powder / Tongue (Division Averages)
  Oct
2015
Nov
2015
Dec
2015
  Jan
2016
Feb
2016
Mar
2016
Apr
2016
May
2016
Jun
2016
Jul
2016
Aug
2016
Sep
2016
  Total for
Water Year
  Average Temperature   50.3 31.6 24.1   26.1 33.2 37.5 43.9 50.3 67.1 70.3 66.5 57.7   46.6
  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   5.7 0.5 1.7   6.5 9.4 6.4 2.7 -0.5 6.9 2.1 0.0 1.8   3.6
  Rank: Warm to Cold (122 yrs)   2 54 55   18 4 11 27  69 3  32 66 41   5
  Rank: Cold to Warm (122 yrs)   120 68 67   104 119 112 96 54 120 91 57 82   117
  Precipitation   0.73 0.55 0.51   0.43 0.74 1.37 2.90 1.64 0.74 0.87 1.06 2.86    14.40
  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   63 71 78    68 121 130 107 65 31 62 110 223   94
  Rank: Dry to Wet (122 yrs)   37 36 45   35 85 90 107 22 7 29 80 119   49
  Rank: Wet to Dry (122 yrs)   85 86 77   87 38 33 16 101 116 94 43 4   73
    

Station Name:
 
Drought
Conditions
  Oct
2015
Nov
2015
Dec
2015
  Jan
2016
Feb
2016
Mar
2016
Apr
2016
May
2016
Jun
2016
Jul
2016
Aug
2016
Sep
2016
  Total for
Water Year
 click on location   D0 D1                                
 for graph D2 D3 D4                                
Buffalo Airport None   0.71 0.44 0.10    0.13 0.46 0.65 2.17 1.51 0.39 0.49 0.52 3.24   10.81
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    76 81 25    31 131 71 167 60 17 30 64 247    80
                                 
Sheridan Arpt None   1.22 0.69 0.24   0.56 0.89 1.59 3.36 1.06 0.39 0.22 1.44 3.71   15.37
  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    87 97 43    100  165 162 210 45 18 19 200 259    109
                                 
                                 
Kaycee None   0.51 0.51 0.36   0.16 0.21 0.53 2.85 2.21 0.30 0.14 0.58 3.23    11.59
  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    49 89 116    53 62 72 195 93 16 10 73 274    94
Snowfall   0.0 2.0 7.1    2.0 6.0 2.0 1.0 0.0 0.0 0.0 0.0 0.0   20.1
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 48 118    34  95 25 21 0 0 0 0 0   54
                                 

Climate Division 6 - Belle Fourche Drainage
Climate Division:
Belle Fourche (Division Averages)
  Oct
2015
Nov
2015
Dec
2015
  Jan
2016
Feb
2016
Mar
2016
Apr
2016
May
2016
Jun
2016
Jul
2016
Aug
2016
Sep
2016
  Total for
Water Year
  Average Temperature   49.4 31.8 24.6   26.0 33.2 38.3 43.6 51.5 68.4 71.2 66.9 58.6   47.0
  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   4.4 0.8 2.5   7.0 10.1 7.7 2.2 0.2 7.5 2.4 -0.1 2.2   3.9
  Rank: Warm to Cold (122 yrs)   12 52 45   16 4 8  35 55 2 29 64 37   3
  Rank: Cold to Warm (122 yrs)   110 70 77   106 119 115 88 68 121 94 59 86   119
  Precipitation   1.27 0.44 0.51   0.39 0.83 1.49 2.21 1.06 0.94 1.54 1.55 2.25   14.48
  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   111 64 80    66 141 152 126 40 33 84 117 170   89
  Rank: Dry to Wet (122 yrs)   85 36 52   36 97 102 87 10 8 55 80 104   38
  Rank: Wet to Dry (122 yrs)   37 86 70   86 26 21 36 113 115 68 43 19   84
    

Station Name:
 
Drought
Conditions
  Oct
2015
Nov
2015
Dec
2015
  Jan
2016
Feb
2016
Mar
2016
Apr
2016
May
2016
Jun
2016
Jul
2016
Aug
2016
Sep
2016
  Total for
Water Year
 click on location   D0 D1                                
 for graph D2 D3 D4                                
Gillette Airport   D1   0.87 0.47 0.48   0.40 1.11 1.11 2.55 0.67 0.44 1.32 1.56 2.50   13.48
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    69 85  120    103 285 116 173 27 20 80 164 210   97

Climate Division 7 - Cheyenne and Niobrara Drainages
Climate Division:
Cheyenne / Niobrara (Division Avgs)
  Oct
2015
Nov
2015
Dec
2015
  Jan
2016
Feb
2016
Mar
2016
Apr
2016
May
2016
Jun
2016
Jul
2016
Aug
2016
Sep
2016
  Total for
Water Year
  Average Temperature   50.4 32.4 24.8   26.2 33.3 38.5 44.6 50.9 69.1 71.7 67.8 59.6   47.4
  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   4.5 0.6 1.8   5.9 8.7 6.4 2.1 -1.5 6.6 1.4 -0.6 2.0   3.2
  Rank: Warm to Cold (122 yrs)   8 56 47   20 5 11  33 83 4 40 71 42   4
  Rank: Cold to Warm (122 yrs)   115 66 75   102 118 112 90 40 119 83 52 81   118
  Precipitation   1.08 0.44 0.40   0.21 0.63 1.38 2.00 1.67 1.17 1.95 1.48 1.33   13.74
  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   13.16
  Percent of Average   114 80 83    50 137 182 119 66 50 110 122 117   96
  Rank: Dry to Wet (122 yrs)   78 51 51   22 90 112 86 34 22 84 90 80   50
  Rank: Wet to Dry (122 yrs)   44 71 71   100 33 11 37 89 101 39 33 43   72
    

Climate Division 8 - Lower Platte Drainage
Climate Division:
Lower Platte (Division Averages)
  Oct
2015
Nov
2015
Dec
2015
  Jan
2016
Feb
2016
Mar
2016
Apr
2016
May
2016
Jun
2016
Jul
2016
Aug
2016
Sep
2016
  Total for
Water Year
  Average Temperature   51.4 32.8 25.5   26.6 32.8 37.1 43.1 49.3 66.8 70.1 66.0 58.8   46.7
  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   43.9
  Departure from Avegage   6.2 0.5 0.8   3.8 6.9 5.0 1.9 -1.5 6.1 2.1 -0.2 2.4   2.8
  Rank: Warm to Cold (122 yrs)   2 59 59    33 7 18 38  86 3  29 66 31   5
  Rank: Cold to Warm (122 yrs)   120 63 63    89 116 105 85 37 120 94 57 92   117
  Precipitation   1.49 1.00 0.84   0.62 0.79 2.19 3.40 2.49 0.66 0.64 1.32 1.07   16.51
  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   142 147 133   122 134 226 179 98 32 41 113 88   111
  Rank: Dry to Wet (122 yrs)   94 101 94   89 95 119 113 68 7 5 79 58   88
  Rank: Wet to Dry (122 yrs)   28 21 28   33 28 4 10 55 116 118 44 65   34
    

Station Name:
 
Drought
Conditions
  Oct
2015
Nov
2015
Dec
2015
  Jan
2016
Feb
2016
Mar
2016
Apr
2016
May
2016
Jun
2016
Jul
2016
Aug
2016
Sep
2016
  Total for
Water Year
 click on location   D0 D1                                
 for graph D2 D3 D4                                
Casper Airport   None   0.94 0.70 1.06   0.99 0.47 1.36 3.63 3.01 1.17 0.24 1.30 1.55   16.42
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    85 92 216    194 82 166 281 149 73 17 153 144    131
Snowfall   0.0 13.3  16.8   13.4  15.2 13.4 14.5 0.0 0.0 0.0 0.0 0.0   86.6
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    0 129  153    147 155 123 125 0 0 0 0 0    116
                                 
Cheyenne Arpt  None   1.82 1.11 0.85   0.48 0.72 2.33 3.13 2.03 2.08 1.08 1.05 0.80   17.49
  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     196 188  173    145  153 222 176 87 89 49 54 54    110
Snowfall   T 10.7 15.1    8.9 11.1 24.9 19.7 1.6 0.0 0.0 0.0 T   92.0
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    0 134 180    151 141 220 193 70 0 0 0 0   153
                                 

Climate Division 9 - Wind River Drainage
Climate Division:
Wind River (Division Averages)
  Oct
2015
Nov
2015
Dec
2015
  Jan
2016
Feb
2016
Mar
2016
Apr
2016
May
2016
Jun
2016
Jul
2016
Aug
2016
Sep
2016
  Total for
Water Year
  Average Temperature   48.2 28.1 19.9   21.3 29.9 33.8 41.6 47.2 63.0 65.9 62.4 54.3   43.0
  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   6.4 0.2 0.4   4.0 7.9 4.8 3.3 -0.8 6.0 1.2 -0.4 1.4   2.9
  Rank: Warm to Cold (122 yrs)   2 65 58    30 5 15  25  72 2 43 72 42   6
  Rank: Cold to Warm (122 yrs)   120 57 64   92 118 108 98 51 121 80 51 81   116
  Precipitation   0.87 1.16 0.69   0.60 0.64 2.64 3.07 3.33 0.50 0.26 0.79 2.42   16.97
  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   73 121 82    65 79 210 162 148 30 25 90 203   114
  Rank: Dry to Wet (122 yrs)   47 84 47   33 43 119 113 100 13 2 68 114   97
  Rank: Wet to Dry (122 yrs)   75 38 75   89 80 4 10 24 110 121 55 9   25
    

Station Name:
 
Drought
Conditions
  Oct
2015
Nov
2015
Dec
2015
  Jan
2016
Feb
2016
Mar
2016
Apr
2016
May
2016
Jun
2016
Jul
2016
Aug
2016
Sep
2016
  Total for
Water Year
 click on location   D0 D1                                
 for graph D2 D3 D4                                
Lander Airport None   0.88 1.20 0.48   0.42 0.50 4.59 4.61 5.03 0.57 T 0.52 1.68   20.48
  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    68  140 83    102  86 396 247 229 45 0 85 160    162
Snowfall   0.0 19.0 8.8    5.3  3.9 33.3 4.3 T 0.0 0.0 0.0 0.0   74.6
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    0 145 87    70 38 207 26 0 0 0 0 0   82
                                 
Riverton Airport  None   0.33  1.00 0.08   0.40 0.28 2.13 3.31 2.77 0.39 T 0.22 1.98    13.11
  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     37 200 25    167 104 387 255 161 30 0 44 220   139
Snowfall   0.0  18.1  2.2    5.3 2.6 21.5 12.7 T 0.0 0.0 0.0 0.0    62.4
                                 
Dubois  None   1.29 0.51 0.22   0.23 0.13 1.05 1.01 2.39 0.68 0.58 0.48 2.61    11.18
  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    159 89 79    96 34 263 92 146 53 52 56 210    113
Snowfall   1.0 9.5 4.5    4.0  1.5 14.7 2.0 T 0.0 0.0 0.0 1.0   38.2
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    33 164 88    103 26 245 24 0 0 0 0 38   85
                                 
Riverton  None   0.38 0.99 0.09   0.49 0.19 2.70 3.82 2.59 0.12 0.13 0.22 1.75   13.47
  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    45  241 38    175  58 482 390 179 10 17 44 211    160
Snowfall    0.0 19.0 2.4    7.7  2.7 22.1 9.0 T 0.0 0.0 0.0 0.0   62.9
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  442  50    160 45 375 148 0 0 0 0 0   170

Climate Division 10 - Upper Platte Drainage
Climate Division:
Upper Platte (Division Averages)
  Oct
2015
Nov
2015
Dec
2015
  Jan
2016
Feb
2016
Mar
2016
Apr
2016
May
2016
Jun
2016
Jul
2016
Aug
2016
Sep
2016
  Total for
Water Year
  Average Temperature   48.8 29.6 20.5   20.8 27.8 32.9 39.9 46.3 63.3 66.2 62.5 54.8   42.8
  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   7.0 1.3 0.3   2.5 6.1 4.9 2.4 -1.1 6.2 1.7 -0.1 1.9   2.8
  Rank: Warm to Cold (122 yrs)   1 40 59   38 13 18  34 78  2  27 70 37   8
  Rank: Cold to Warm (122 yrs)   121 73 63   84 110 105 89 45 121 96 53 86   114
  Precipitation   0.85 0.99 0.90   0.95 0.69 1.93 2.62 2.46 0.51 0.33 0.41 1.36   14.00
  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   78 119 110    119 83 182 166 138 40 30 43 126   106
  Rank: Dry to Wet (122 yrs)   50 87 78   90 45 116 115 98 21 3 12 89   80
  Rank: Wet to Dry (122 yrs)   72 35 44   32 78 7 8 25 102 120 111 34   42
    

Station Name:
 
Drought
Conditions
  Oct
2015
Nov
2015
Dec
2015
  Jan
2016
Feb
2016
Mar
2016
Apr
2016
May
2016
Jun
2016
Jul
2016
Aug
2016
Sep
2016
  Total for
Water Year
 click on location   D0 D1                                
 for graph D2 D3 D4                                
Jeffrey City  None   0.08 0.78 0.30   0.45 0.46 1.44 2.86 2.92 0.23 0.04 0.63 1.93    12.12
  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    73 132 71   145 112 167 225 158 20 4 105 241    120
Snowfall   0.0 10.0 4.0   4.1  4.0 17.0 19.0 1.0 0.0 0.0 0.0 0.0   59.1
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  152 73   89 60 181 186 20 0 0 0 0    104