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Powerful Pacific System Impacting the West; First Significant Snow for Portions of the East

Power Pacific system will continue to bring significant impacts for Pacific Northwest into northern California the remainder of the week. Dangerous coastal affects, heavy rain, flooding, strong winds, and higher elevation mountain snow continues. Meanwhile, a storm across the east is set to bring the first accumulating snow to many higher elevations of the Catskills into the central Appalachians. Read More >

Western and Central Wyoming

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Drought Information Page - Climate Summary

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Wyoming Climate      |      Click on Image to Enlarge
Statewide averages and ranks for periods including February 2021 will be available on March 6, 2021*
* 2021 Climate Monitoring Release Dates

Wyoming: May 2021
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)    Statewide Average (°F)  
 20th Century Average 1.77  20th Century Average 38.8
 Rank - Driest  to Wettest  (125 Years)   Rank - Warmest  to Coldest (125 Years)  
 Rank - Wettest to Driest  (125 Years)    Rank - Coldest to Warmest (125 Years)  
 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 2020-21 (October - September)
Precipitation - Percent of Normal Temperature - Departure from Normal
Wyoming: Water Year 2020-19 Percent of Normal Precipitation (Click to Enlarge) Wyoming: Water Year 202019 Departure from Normal Temperature
Climate Division:
Wyoming (Statewide Averages)		   Oct
2020		 Nov
2020		 Dec
2020		   Jan
2021		 Feb
2021		 Mar
2021		 Apr
2021		 May
2021		 Jun
2021		 Jul
2021		 Aug
2021		 Sep
2021		   Total for
WY2020-21
  Average Temperature                                
  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                                
  Rank: Warm to Cold (125 yrs)                                
  Rank: Cold to Warm (125 yrs)                                
  Precipitation                                
  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                                
  Rank: Dry to Wet (125 yrs)                                
  Rank: Wet to Dry (125 yrs)                                
    
Maps and Statewide Averages for 3, 12 and 60 Months

Wyoming Climate Divisions: 2021
Wyoming Climate Divisions Map - Click to Enlarge
Climate Division 1 - Yellowstone Drainage
Climate Division:
Yellowstone (Division Averages)		   Oct
2020		 Nov
2020		 Dec
2020		   Jan
2021		 Feb
2021		 Mar
2021		 Apr
2021		 May
2021		 Jun
2021		 Jul
2021		 Aug
2021		 Sep
2021		   Total for
WY2020-21
  Average Temperature                                
  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   -                            
  Rank: Warm to Cold (125 yrs)                                
  Rank: Cold to Warm (125 yrs)                                
  Precipitation                                
  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                                
  Rank: Dry to Wet (125 yrs)                                
  Rank: Wet to Dry (125 yrs)                                
    
Station Name:   Oct
2020		 Nov
2020		 Dec
2020		   Jan
2021		 Feb
2021		 Mar
2021		 Apr
2021		 May
2021		 Jun
2021		 Jul
2021		 Aug
2021		 Sep
2021		   Total for
2020-21
 click on location   D0 D1                                
 for graph D2 D3 D4                                
Old Faithful None   2.08 2.34 1.25                       5.67
  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    125 102 40                       36
Snowfall   8.6 24.8 26.2                       59.6
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    112 78 60                       30
                                 
Climate Division 2 - Snake Drainage
Climate Division:
Snake (Division Averages)		   Oct
2020		 Nov
2020		 Dec
2020		   Jan
2021		 Feb
2021		 Mar
2021		 Apr
2021		 May
2021		 Jun
2021		 Jul
2021		 Aug
2021		 Sep
2021		   Total for
WY2020-21
  Average Temperature                                
  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                                
  Rank: Warm to Cold (125 yrs)                                
  Rank: Cold to Warm (125 yrs)                                
  Precipitation                                
  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                                
  Rank: Dry to Wet (125 yrs)                                
  Rank: Wet to Dry (125 yrs)                                
   
v
Station Name:   Oct
2020		 Nov
2020		 Dec
2020		   Jan
2021		 Feb
2021		 Mar
2021		 Apr
2021		 May
2021		 Jun
2021		 Jul
2021		 Aug
2021		 Sep
2021		   Total for
WY2020-21
 click on location   D0 D1                                
 for graph D2 D3 D4                                
Afton None   0.46 1.68 1.47                       3.61
  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    28 114 118                       37
Snowfall   1.5 13.6 18.3                       33.4
                                 
Moose None   1.77 2.29 1.4                       5.46
  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    120 87 52                       38
Snowfall   7.2 19.9 21.2                       48.3
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    150 83 47                       30
                                *Missing Data
JHMR MId Mtn None                                
Snowfall   16 59 59                       134
1975-2020 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    351.0
  Percent of Normal    100 174 78                       37
                                 
Climate Division 3 - Green and Bear Drainages
Climate Division:
Green and Bear (Division Averages)		   Oct
2020		 Nov
2020		 Dec
2020		   Jan
2021		 Feb
2021		 Mar
2021		 Apr
2021		 May
2021		 Jun
2021		 Jul
2021		 Aug
2021		 Sep
2021		   Total for
WY2020-21
  Average Temperature                                
  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                                
  Rank: Warm to Cold (125 yrs)                                
  Rank: Cold to Warm (125 yrs)                                
  Precipitation                                
  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                                
  Rank: Dry to Wet (125 yrs)                                
  Rank: Wet to Dry (125 yrs)                                
    
v v v
Station Name:   Oct
2020		 Nov
2020		 Dec
2020		   Jan
2021		 Feb
2021		 Mar
2021		 Apr
2021		 May
2021		 Jun
2021		 Jul
2021		 Aug
2021		 Sep
2021		   Total for
WY2020-21
 click on location   D0 D1                                
 for graph D2 D3 D4                                
Big Piney Airport None   0.04 0.17 0.01                       0.22
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    8 81 3                       3
                                 
Evanston Airport D0   0.22 0.25 0.05                       0.52
  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    19 24 9                       4
                                 
Rock Springs Arpt. None   0.07 0.22 0.01                       0.30
 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    8 45 2                       4
                                 
Bitter Creek 4NE None   0.12 0.22 0.17                       0.51
  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    18 71 33                       7
                                 
Fossil Butte N.M. None   0.69 1.05 0.57                       2.31
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    32 122 77                       21
Snowfall   1.5 11.4 8.8                       21.7
                                 
Green River None   0.55 0.28 0.48                       1.31
  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   68 68 109                       16
Snowfall   4.5 1.8 5.9                       12.2
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   900 47 91                       38
                                 
Rock Springs  None   0.31 0.35 0.28                       0.94
  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    28 67 54                       10
Snowfall   3.5 4 6.3                       13.8
                                 
Climate Division 4 - Big Horn Drainage
Climate Division:
Big Horn (Division Averages)		   Oct
2020		 Nov
2020		 Dec
2020		   Jan
2021		 Feb
2021		 Mar
2021		 Apr
2021		 May
2021		 Jun
2021		 Jul
2021		 Aug
2021		 Sep
2021		   Total for
WY2020-21
  Average Temperature                                
  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                                
  Rank: Warm to Cold (125 yrs)                                
  Rank: Cold to Warm (125 yrs)                                
  Precipitation                                
  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                                
  Rank: Dry to Wet (125 yrs)                                
  Rank: Wet to Dry (125 yrs)                                
    
Station Name:   Oct
2020		 Nov
2020		 Dec
2020		   Jan
2021		 Feb
2021		 Mar
2021		 Apr
2021		 May
2021		 Jun
2021		 Jul
2021		 Aug
2021		 Sep
2021		   Total for
WY2020-21
 click on location   D0 D1                                
 for graph D2 D3 D4                                
Greybull Airport   D0   0.4 T 0.04                       0.44
  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    67 0 14                       6
                                 
Worland Airport None   0.18 0.04 0.09                       0.31
  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    26 11 39                       4
                                 
Cody  D0   0.9 0.32 0.1                       1.32
  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    101 67 30                       13
Snowfall   5 1.2 1.2                       7.4
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    116 19 15                       16
                                 
Powell Field Station   D0   0.29 0.09 0.07                       0.39
  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    52 50 8                       6
Snowfall   2.5 0.2 0.4                       3.1
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
  Percent of Normal    208 15 33                       31
                                 
Thermopolis None   0.2 0.01 0.31                       0.52
  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    16 1 67                       4
Snowfall   4 0 3.5                       7.5
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    108 0 63                       28
Climate Division 5 - Powder and Tongue Drainages
Climate Division:
Powder and Tongue
(Division Averages)		   Oct
2020		 Nov
2020		 Dec
2020		   Jan
2021		 Feb
2021		 Mar
2021		 Apr
2021		 May
2021		 Jun
2021		 Jul
2021		 Aug
2021		 Sep
2021		   Total for
WY2020-21
  Average Temperature                                
  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                                
  Rank: Warm to Cold (125 yrs)                                
  Rank: Cold to Warm (125 yrs)                                
  Precipitation                                
  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                                
  Rank: Dry to Wet (125 yrs)                                
  Rank: Wet to Dry (125 yrs)                                
    
Station Name:   Oct
2020		 Nov
2020		 Dec
2020		   Jan
2021		 Feb
2021		 Mar
2021		 Apr
2021		 May
2021		 Jun
2021		 Jul
2021		 Aug
2021		 Sep
2021		   Total for
WY2020-21
 click on location   D0 D1                                
 for graph D2 D3 D4                                
Buffalo Airport D0   1.17 0.08 0                       1.25
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    126 15 0                       9
                                 
Sheridan Arpt D0   2.62 0.04 0.28                       2.94
  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    186 6 50                       21
                                 
Kaycee None   0.36 0.10 0.41                       0.87
  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    35 18 132                       7
Snowfall   4 1.2 8                       13.2
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    267 29 133                       35
                                 
Climate Division 6 - Belle Fourche Drainage
v
Climate Division:
Belle Fourche (Division Averages)		   Oct
2020		 Nov
2020		 Dec
2020		   Jan
2021		 Feb
2021		 Mar
2021		 Apr
2021		 May
2021		 Jun
2021		 Jul
2021		 Aug
2021		 Sep
2021		   Total for
WY2020-21
  Average Temperature                                
  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                                
  Rank: Warm to Cold (125 yrs)                                
  Rank: Cold to Warm (125 yrs)                                
  Precipitation                                
  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                                
  Rank: Dry to Wet (125 yrs)                                
  Rank: Wet to Dry (125 yrs)                                
    
\
Station Name:   Oct
2020		 Nov
2020		 Dec
2020		   Jan
2021		 Feb
2021		 Mar
2021		 Apr
2021		 May
2021		 Jun
2021		 Jul
2021		 Aug
2021		 Sep
2021		   Total for
WY2020-21
 click on location   D0 D1                                
 for graph D2 D3 D4                                
Gillette Airport None   1.31 0.09 0.33                       1.73
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    103 16 83                       12
                                 
Climate Division 7 - Cheyenne and Niobrara Drainages
v v
Climate Division: Cheyenne and Niobrara
(Division Averages)		   Oct
2020		 Nov
2020		 Dec
2020		   Jan
2021		 Feb
2021		 Mar
2021		 Apr
2021		 May
2021		 Jun
2021		 Jul
2021		 Aug
2021		 Sep
2021		   Total for
WY2020-21
  Average Temperature                                
  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                                
  Rank: Warm to Cold (125 yrs)                                
  Rank: Cold to Warm (125 yrs)                                
  Precipitation                                
  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                                
  Rank: Dry to Wet (125 yrs)                                
  Rank: Wet to Dry (125 yrs)                                
    
Climate Division 8 - Lower Platte Drainage
Climate Division:
Lower Platte (Division Averages)		   Oct
2020		 Nov
2020		 Dec
2020		   Jan
2021		 Feb
2021		 Mar
2021		 Apr
2021		 May
2021		 Jun
2021		 Jul
2021		 Aug
2021		 Sep
2021		   Total for
WY2020-21
  Average Temperature                                
  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                                
  Rank: Warm to Cold (125 yrs)                                
  Rank: Cold to Warm (125 yrs)                                
  Precipitation                                
  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                                
  Rank: Dry to Wet (125 yrs)                                
  Rank: Wet to Dry (125 yrs)                                
    
Station Name:   Oct
2020		 Nov
2020		 Dec
2020		   Jan
2021		 Feb
2021		 Mar
2021		 Apr
2021		 May
2021		 Jun
2021		 Jul
2021		 Aug
2021		 Sep
2021		   Total for
WY2020-21
 click on location   D0 D1                                
 for graph D2 D3 D4                                
Casper Airport   None   0.32 0.04 0.68                       1.04
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    29 5 139                       8
Snowfall   3.7 0.4 11                       15.1
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    50 4 100                       20
                                 
Cheyenne Arpt None   0.85 0.18 0.48                       1.51
  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    91 31 98                       9
Snowfall   15.1 3 5.6                       23.7
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    302 38 67                       39
                                 
Climate Division 9 - Wind River Drainage
Climate Division:
Wind River (Division Averages)		   Oct
2020		 Nov
2020		 Dec
2020		   Jan
2021		 Feb
2021		 Mar
2021		 Apr
2021		 May
2021		 Jun
2021		 Jul
2021		 Aug
2021		 Sep
2021		   Total for
WY2020-21
  Average Temperature                                
  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                                
  Rank: Warm to Cold (125 yrs)                                
  Rank: Cold to Warm (125 yrs)                                
  Precipitation                                
  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                                
  Rank: Dry to Wet (125 yrs)                                
  Rank: Wet to Dry (125 yrs)                                
    
v
Station Name:   Oct
2020		 Nov
2020		 Dec
2020		   Jan
2021		 Feb
2021		 Mar
2021		 Apr
2021		 May
2021		 Jun
2021		 Jul
2021		 Aug
2021		 Sep
2021		   Total for
WY2020-21
 click on location   D0 D1                                
 for graph D2 D3 D4                                
Lander Airport  None   0.68 0.18 0.59                       1.45
  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    53 21 102                       11
Snowfall   7.8 T 9.3                       17.1
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    80 0 92                       19
                                 
Riverton Airport   None   0.23 0.05 0.36                       0.64
  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    26 10 113                       7
Snowfall   3.8 T 8.2                       12
                                 
Dubois   None   0.7 0.47 0.10                       1.27
  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    86 82 36                       13
Snowfall   9.5 6.5 1.7                       17.7
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    317 112 33                       39
                                 
Riverton  None   0.18 0.03 0.36                       0.57
  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    21 7 150                       7
Snowfall   3.8 T 6.4                       10.2
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    103 0 133                       27
Climate Division 10 - Upper Platte Drainage
Climate Division:
Upper Platte (Division Averages)		   Oct
2020		 Nov
2020		 Dec
2020		   Jan
2021		 Feb
2021		 Mar
2021		 Apr
2021		 May
2021		 Jun
2021		 Jul
2021		 Aug
2021		 Sep
2021		   Total for
WY2020-21
  Average Temperature                                
  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                                
  Rank: Warm to Cold (125 yrs)                                
  Rank: Cold to Warm (125 yrs)                                
  Precipitation                                
  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                                
  Rank: Dry to Wet (125 yrs)                                
  Rank: Wet to Dry (125 yrs)                                
    
Station Name:   Oct
2020		 Nov
2020		 Dec
2020		   Jan
2021		 Feb
2021		 Mar
2021		 Apr
2021		 May
2021		 Jun
2021		 Jul
2021		 Aug
2021		 Sep
2021		   Total for
WY2020-21
 click on location   D0 D1                                
 for graph D2 D3 D4                                
Jeffrey City  None   0.23 0.15 0.60                       0.98
  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    25 25 143                       10
Snowfall   3.3 0.1 7.9                       11.3
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    45 2 144                       20
2020
Annual		 2017-18
Water Year		 2017
Annual		 2016-17
Water Year		 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 February 2021 will be available on March6, 2021*
* 2021 Climate Monitoring Release Dates

Wyoming: 2021
Precipitation - Percent of Normal Temperature - Departure from Normal
Wyoming: 2021 Percent of Normal Precipitation Wyoming: 2021 Departure from Normal Temperature
 Statewide Average (inches)    Statewide Average (°F)  
 20th Century Average 5.06  20th Century Average 27.1
 Rank - Driest  to Wettest  (125 Years)    Rank - Warmest  to Coldest (125 Years)  
 Rank - Wettest to Driest (125 Years)    Rank - Coldest to Warmest (125 Years)  
 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 2021)
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
 
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