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Wyoming Climate      |      Click on Image to Enlarge
Statewide averages and ranks for periods including February 2018 will be available on March 7, 2018*
* 2018 Climate Monitoring Release Dates

Wyoming: January 2018

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) 0.89  Statewide Average (°F) 25.2
 20th Century Average 1.06  20th Century Average 18.4
 Rank - Driest  to Wettest  (123 Years) 46 Rank - Warmest  to Coldest (123 Years) 8
 Rank - Wettest to Driest  (123 Years) 79  Rank - Coldest to Warmest (123 Years) 117
 Driest Month on Record:  January 1961 0.15   Warmest Month on Record: January 1953 29.1
 Wettest Year on Record: January 1895 2.18   Coldest Month on Record: January 1937 3.5

Wyoming: Water Year 2017-18

Precipitation - Percent of Normal Temperature - Departure from Normal
Wyoming: Water Year 2017-18 Percent of Normal Precipitation (Click to Enlarge) Wyoming: Water Year 2017-18 Departure from Normal Temperature
Climate Division:
Wyoming (Statewide Averages)
  Oct
2017
Nov
2017
Dec
2017
Jan
2018
Feb
2018
Mar
2018
Apr
2018
May
2018
Jun
2018
Jul
2018
Aug
2018
Sep
2018
  Total for
WY 2017-18
  Average Temperature   41.0 34.6 23.9 25.2                   31.2
  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   27.6
  Departure from Average   -1.5 5.6 3.3 6.8                   3.6
  Rank: Warm to Cold (123 yrs)    91 8 27 8                   7
  Rank: Cold to Warm (123 yrs)    33 116 97 117                   117
  Precipitation    0.78 1.48 1.02 0.89                   4.17
  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   4.30
  Percent of Average    65 144 101 84                   97
  Rank: Dry to Wet (123 yrs)   33 106 68 46                   56
  Rank: Wet to Dry (123 yrs)   91 18 56 79                   68
    
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: January 2018 Rankings

Precipitation Rankings
Driest to Wettest 124 Years
Temperature Rankings
Coldest to Warmest 124 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: Water Year 2017-18 (Oct-Sep)

Precipitation Rankings
Driest to Wettest 124 Years
Temperature Rankings
Coldest to Warmest 124 Years
Wyoming Climate Divisions: Water Year 2017-18 Precipitation Rankings (Click to Enlarge) Wyoming Climate Divisions: 2017-18 Water Year Temperature Rankings (Click to Enlarge)

Climate Division 1 - Yellowstone Drainage
Climate Division:
Yellowstone (Division Averages)
  Oct
2017
Nov
2017
Dec
2017
Jan
2018
Feb
2018
Mar
2018
Apr
2018
May
2018
Jun
2018
Jul
2018
Aug
2018
Sep
2018
  Total for
WY 2017-18
  Average Temperature   36.2 27.9 19.6 22.6                   26.6
  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   23.5
  Departure from Avegage   -1.1 3.3 2.7 7.4                   3.1
  Rank: Warm to Cold (123 yrs)    85 25 33 6                   13
  Rank: Cold to Warm (123 yrs)    39 99 91 119                   111
  Precipitation    1.31 5.54 2.86 2.94                   12.65
  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    9.89
  Percent of Average    70 222 109 102                   128
  Rank: Dry to Wet (123 yrs)   39 119 73 72                   103
  Rank: Wet to Dry (123 yrs)   85 5 51 53                   21
    

Station Name:   Oct
2017
Nov
2017
Dec
2017
Jan
2018
Feb
2018
Mar
2018
Apr
2018
May
2018
Jun
2018
Jul
2018
Aug
2018
Sep
2018
  Total for
WY 2017-18
 click on location   D0 D1                              
 for graph D2 D3 D4                              
Old Faithful None   1.62 5.47 2.10 2.44                   11.63
  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    9.22
  Percent of Normal     98 239 66 116                   126
Snowfall    8.5 45.5 43.5 40.5                   138.0
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    120.7
  Percent of Normal     110 144 99 108                   114
                               

Climate Division 2 - Snake Drainage
Climate Division:
Snake (Division Averages)
  Oct
2017
Nov
2017
Dec
2017
Jan
2018
Feb
2018
Mar
2018
Apr
2018
May
2018
Jun
2018
Jul
2018
Aug
2018
Sep
2018
  Total for
WY 2017-18
  Average Temperature   35.0 27.8 19.5 21.9                   26.1
  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   23.1
  Departure from Avegage   -2.4 3.5 3.5 7.2                   3.0
  Rank: Warm to Cold (123 yrs)    100 24 23 3                   11
  Rank: Cold to Warm (123 yrs)    24 100 101 122                   113
  Precipitation    1.63 6.35 2.48 3.67                   14.13
  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    13.51
  Percent of Average   77 191 67 85                   105
  Rank: Dry to Wet (123 yrs)   46 115 31 54                   77
  Rank: Wet to Dry (123 yrs)   78 9 93 71                   47
    

v v v0.63
Station Name:   Oct
2017
Nov
2017
Dec
2017
Jan
2018
Feb
2018
Mar
2018
Apr
2018
May
2018
Jun
2018
Jul
2018
Aug
2018
Sep
2018
  Total for
WY 2017-18
 click on location   D0 D1                              
 for graph D2 D3 D4                              
Afton None   0.64 2.83 1.42 1.42                   6.31
  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   5.76
  Percent of Normal    39 191 114 101                   110
Snowfall    2.4 5.7 19.6 16.2                   43.9
                               
Moose None   1.00 3.85 1.34 1.62                   7.81
  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    9.36
  Percent of Normal    68 146 50 63                   83
Snowfall    4.1  13.6 15.9 23.4                    57.0
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    110.5
  Percent of Normal     85 56 36 63                   52
                               
JHMR MId Mtn None                              
Snowfall    22.0 70.0 52.0 65.0                    209.0
1975-2018 Average   17.0 34.0 76.0 82.0 65.0 55.0 20.0 13.0 2.0 0.0 0.0 1.0    209.00
  Percent of Normal     129 206 68  79                   100
                               

Climate Division 3 - Green and Bear Drainages
v V V
Climate Division:
Green and Bear (Division Averages)
  Oct
2017
Nov
2017
Dec
2017
Jan
2018
Feb
2018
Mar
2018
Apr
2018
May
2018
Jun
2018
Jul
2018
Aug
2018
Sep
2018
  Total for
WY 2017-18
  Average Temperature   39.0 33.5 25.0 24.6                   30.5
  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   25.6
  Departure from Avegage   -1.7 6.5 6.7 8.4                   5.0
  Rank: Warm to Cold (123 yrs)    94 4 9 5                   3
  Rank: Cold to Warm (123 yrs)    30 120 115 120                   121
  Precipitation    0.35 1.36 0.86 0.83                   3.40
  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    4.37
  Percent of Average    30 132 83 72                   78
  Rank: Dry to Wet (123 yrs)   13 92 49 47                   27
  Rank: Wet to Dry (123 yrs)   111 32 75 78                   97
    

v v v
Station Name:   Oct
2017
Nov
2017
Dec
2017
Jan
2018
Feb
2018
Mar
2018
Apr
2018
May
2018
Jun
2018
Jul
2018
Aug
2018
Sep
2018
  Total for
WY 2017-18
 click on location   D0 D1                              
 for graph D2 D3 D4                              
Big Piney Airport  None   0.01 0.25 0.07 0.05                   0.38
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    1.35
Percent of Normal    2 119 23 16                    28
                               
Evanston Airport None   T 1.47 0.07 0.17                   1.71
  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    3.33
  Percent of Normal     0 141 12 31                   51
                               
Rock Springs Arpt.  D0   0.02 0.29  0.11 0.08                   0.50
 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    2.31
  Percent of Normal     2 59  22 18                    22
                               
Bitter Creek 4NE D0   0.04 0.50 0.32 0.10                   0.96
  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    1.76
  Percent of Normal     6 161  63 36                   55
                               
Fossil Butte N.M.   D0    0.50 1.89  0.86 0.60                   3.85
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    3.20
  Percent of Normal    45 220  116 122                   120
Snowfall    1.7 8.5  12.5 7.3                    30.0
                               
Green River None   0.07 0,80  0.60 0.68                   2.15
  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    2.00
  Percent of Normal   9 195  136 200                  

108

Snowfall   T 4.5  6.3 6.8                    17.6
1981-2010 Normals   0.5 3.8 6.5 64.6 7.3 5.0 3.9 0.6 0.0 0.0 0.0 0.0   15.4
Percent of Normal   0 118 97 148                    114
                               
Rock Springs  None   0.10 0.65  0.49 0.37                   1.61
  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    2.57
  Percent of Normal    9 125  94 84                   63
Snowfall   T 1.1 6.9 5.5                    13.5
                               

Climate Division 4 - Big Horn Drainage
Climate Division:
Big Horn (Division Averages)
  Oct
2017
Nov
2017
Dec
2017
Jan
2018
Feb
2018
Mar
2018
Apr
2018
May
2018
Jun
2018
Jul
2018
Aug
2018
Sep
2018
  Total for
WY 2017-18
  Average Temperature   41.3 33.2 22.9 24.8                   30.6
  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   27.5
  Departure from Avegage   --1.3 4.0 2.3 7.1                   3.1
  Rank: Warm to Cold (123 yrs)    83 22 46 14                   15
  Rank: Cold to Warm (123 yrs)    41 102 70 111                   109
  Precipitation   0.79 1.46 1.16 0.60                   4.01
  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   3.88
  Percent of Average   69 154 133 65                   103
  Rank: Dry to Wet (123 yrs)   41 105 92 34                   66
  Rank: Wet to Dry (123 yrs)   83 19 32 91                   58
    

v V
Station Name:   Oct
2017
Nov
2017
Dec
2017
Jan
2018
Feb
2018
Mar
2018
Apr
2018
May
2018
Jun
2018
Jul
2018
Aug
2018
Sep
2018
  Total for
WY 2017-18
 click on location   D0 D1                              
 for graph D2 D3 D4                              
Greybull Airport   None   T 0.21 0.22 0.01                   0.44
  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    1.41
  Percent of Normal     0 70 79 4                   31
                               
Worland Airport None   0.23 0.68 0.44 0.15                   1.50
  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    1.50
  Percent of Normal     33 194 191 65                   100
                               
Cody  None   0.59 1.04 0.84 0.37                   2.84
  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    2.03
  Percent of Normal     66 217 255 112                    140
Snowfall    1.0 6.6 9.0 2.0                   18.6
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   26.4
  Percent of Normal     23 105 113 26                   70
                               
Powell Field Station   None   0.01 0.25 0.19 0.08                   0.53
  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    1.08
  Percent of Normal     2 139 146 38                   49
Snowfall    0.0 0.8 2.0 3.0                   5.8
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   6.0
  Percent of Normal     0  62 167 130                    97
                               
Thermopolis   None   0.70 0.65 0.70 0.39                   2.44
  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    2.87
  Percent of Normal     56 81 152 111                   85
Snowfall   0.0 8.0 11.6 4.5                    24.1
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   16.2
  Percent of Normal     0 216 258 80                   149

Climate Division 5 - Powder and Tongue Drainages
v
Climate Division:
Powder and Tongue
(Division Averages)
  Oct
2017
Nov
2017
Dec
2017
Jan
2018
Feb
2018
Mar
2018
Apr
2018
May
2018
Jun
2018
Jul
2018
Aug
2018
Sep
2018
  Total for
WY 2017-18
  Average Temperature   43.3 35.1 23.5 25.4                   31.8
  20th Century Average   44.6 31.1 22.3 19.6 23.8 31.1 41.2 50.8 60.2 68.2 66.5 55.9   29.4
  Departure from Avegage   -1.3 4.1 1.2 5.8                   2.4
  Rank: Warm to Cold (123 yrs)   83 28 68 24                   25
  Rank: Cold to Warm (123 yrs)   41 96 56 101                   99
  Precipitation   0.79 0.85 0.74 0.50                   2.88
  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   3.21
  Percent of Average    68 110 114 79                   90
  Rank: Dry to Wet (123 yrs)   41 81 85 51                   70
  Rank: Wet to Dry (123 yrs)   83 43 39 74                   54
    

v v2.021.99 V
Station Name:   Oct
2017
Nov
2017
Dec
2017
Jan
2018
Feb
2018
Mar
2018
Apr
2018
May
2018
Jun
2018
Jul
2018
Aug
2018
Sep
2018
  Total for
WY 2017-18
 click on location   D0 D1                              
 for graph D2 D3 D4                              
Buffalo Airport None    0.27  0.61 0.32 0.12                   1.32
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   2.29
  Percent of Normal     29  113 80 29                    58
                               
Sheridan Arpt None   0.34 1.54 1.11 0.63                   3.62
  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   3.24
  Percent of Normal     24 217 198 113                    1112
                               
Kaycee None   1.34 0.76 0.38 0.34                   2.82
  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    2.22
  Percent of Normal     129 133 123 113                    127
Snowfall    1.0 7.5 9.3 5.5                   23.3
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   17.6
  Percent of Normal     67  179 155 93                   132
                               

Climate Division 6 - Belle Fourche Drainage
V
Climate Division:
Belle Fourche (Division Averages)
  Oct
2017
Nov
2017
Dec
2017
Jan
2018
Feb
2018
Mar
2018
Apr
2018
May
2018
Jun
2018
Jul
2018
Aug
2018
Sep
2018
  Total for
WY 2017-18
  Average Temperature   43.8 35.1 21.8 23.7                   31.1
  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   29.3
  Departure from Avegage   -1.2 4.1 -0.3 4.7                   1.8
  Rank: Warm to Cold (123 yrs)   81 25 74 34                   40
  Rank: Cold to Warm (123 yrs)   43 99 50 91                   84
  Precipitation   0.88 0.67 0.92 0.59                   3.06
  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    3.06
  Percent of Average    77 97 144 100                   100
  Rank: Dry to Wet (123 yrs)   69 73 96 72                   70
  Rank: Wet to Dry (123 yrs)   55 51 28 53                   54
    

Station Name:   Oct
2017
Nov
2017
Dec
2017
Jan
2018
Feb
2018
Mar
2018
Apr
2018
May
2018
Jun
2018
Jul
2018
Aug
2018
Sep
2018
  Total for
WY 2017-18
 click on location   D0 D1                              
 for graph D2 D3 D4                              
Gillette Airport None   1.12 0.49 0.71 0.69                   3.01
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    2.61
  Percent of Normal     88 89 178 177                   115
                               

Climate Division 7 - Cheyenne and Niobrara Drainages
Climate Division: Cheyenne and Niobrara
(Division Averages)
  Oct
2017
Nov
2017
Dec
2017
Jan
2018
Feb
2018
Mar
2018
Apr
2018
May
2018
Jun
2018
Jul
2018
Aug
2018
Sep
2018
  Total for
WY 2017-18
  Average Temperature   44.8 36.4 22.7 24.2                   32.0
  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   30.2
  Departure from Avegage   -1.0 4.6 -0.3 3.9                   1.8
  Rank: Warm to Cold (123 yrs)   83 18 73 39                   29
  Rank: Cold to Warm (123 yrs)   41 106 51 86                   95
  Precipitation   0.78 0.60 0.61 0.51                   2.50
  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   2.40
  Percent of Average    82 109 127 121                   104
  Rank: Dry to Wet (123 yrs)   53 77 93 86                   78
  Rank: Wet to Dry (123 yrs)   71 47 31 39                   46
    

Climate Division 8 - Lower Platte Drainage
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Climate Division:
Lower Platte (Division Averages)
  Oct
2017
Nov
2017
Dec
2017
Jan
2018
Feb
2018
Mar
2018
Apr
2018
May
2018
Jun
2018
Jul
2018
Aug
2018
Sep
2018
  Total for
WY 2017-18
  Average Temperature   44.1 39.4 27.1 28.8                   34.9
  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   31.3
  Departure from Avegage   -1.1 7.1 2.4 6.0                   3.6
  Rank: Warm to Cold (123 yrs)   88 4 35 12                   6
  Rank: Cold to Warm (123 yrs)    36 120 89 113                   118
  Precipitation   0.85 0.53 0.62 0.57                   2.57
  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   2.87
  Percent of Average   81 78 98 112                   90
  Rank: Dry to Wet (123 yrs)   49 48 66 81                   44
  Rank: Wet to Dry (123 yrs)   75 76 58 44                   80
    

Station Name:   Oct
2017
Nov
2017
Dec
2017
Jan
2018
Feb
2018
Mar
2018
Apr
2018
May
2018
Jun
2018
Jul
2018
Aug
2018
Sep
2018
  Total for
WY 2017-18
 click on location   D0 D1                              
 for graph D2 D3 D4                              
Casper Airport   None   1.08 0.31 1.37 0.68                   3.44
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    2.87
  Percent of Normal     97 41 280 133                    120
Snowfall   5.6  3.6 19.4 12.3                   40.9
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   37.8
  Percent of Normal     76 35 176 135                    108
                               
Cheyenne Arpt D0   1.13 0.44 0.56 0.57                   2.70
  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   2.34
  Percent of Normal     122 75 114 173                    115
Snowfall    8.0 4.2 8.9 7.4                   28.5
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    27.3
  Percent of Normal     160 53 106 125                   104
                               

Climate Division 9 - Wind River Drainage
Climate Division:
Wind River (Division Averages)
  Oct
2017
Nov
2017
Dec
2017
Jan
2018
Feb
2018
Mar
2018
Apr
2018
May
2018
Jun
2018
Jul
2018
Aug
2018
Sep
2018
  Total for
WY 2017-18
  Average Temperature   40.1 33.3 22.9 24.0                   30.1
  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   26.6
  Departure from Avegage   -1.7 5.4 3.4 6.7                   3.5
  Rank: Warm to Cold (123 yrs)    89 13 33 14                   10
  Rank: Cold to Warm (123 yrs)   37 111 91 111                   114
  Precipitation   0.92 1.65 1.37 0.66                   4.60
  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   3.93
  Percent of Average    77 172 163 71                   117
  Rank: Dry to Wet (123 yrs)   49 110 106 42                   91
  Rank: Wet to Dry (123 yrs)   75 14 18 83                   33
    

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Station Name:   Oct
2017
Nov
2017
Dec
2017
Jan
2018
Feb
2018
Mar
2018
Apr
2018
May
2018
Jun
2018
Jul
2018
Aug
2018
Sep
2018
  Total for
WY 2017-18
 click on location   D0 D1                              
 for graph D2 D3 D4                              
Lander Airport None   1.07 0.45 1.23 0.68                   3.43
  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   3.14
  Percent of Normal     83 52 212 166                    109
Snowfall    4.5 3.5 18.4 11.5                   37.9
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    40.6
  Percent of Normal     46 27 182 151                   93
                               
Riverton Airport  None   0.61 0.54 0.64 0.38                   2.17
  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   1.95
  Percent of Normal     69 108 200 158                   111
Snowfall    2.7 4.6 11.6 5.7                   24.6
                               
Dubois  None   0.95 1.70 0.74 0.22                   3.61
  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    1.90
  Percent of Normal     117 298 264 92                     190
Snowfall    13.0 17.1 10.7 3.2                   44.0
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   17.8
  Percent of Normal     433 295 210 82                   247
                               
Riverton  None   0.53 0.44 0.66 0.44                   2.07
  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    1.78
  Percent of Normal     62 107 275 157                     116
Snowfall    1.3 3.6 11.2 5.9                   22.0
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   17.6
  Percent of Normal     35 84 233 123                   125

Climate Division 10 - Upper Platte Drainage
Climate Division:
Upper Platte (Division Averages)
  Oct
2017
Nov
2017
Dec
2017
Jan
2018
Feb
2018
Mar
2018
Apr
2018
May
2018
Jun
2018
Jul
2018
Aug
2018
Sep
2018
  Total for
WY 2017-18
  Average Temperature   40.0 36.0 24.9 26.3                   31.8
  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   27.2
  Departure from Avegage   -1.8 7.7 4.7 8.0                   4.7
  Rank: Warm to Cold (123 yrs)   93 5 13 5                   4
  Rank: Cold to Warm (123 yrs)   31 119 111 120                   120
  Precipitation   0.68 0.83 0.77 0.69                   2.97
  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   3.54
  Percent of Average    62 100 94 86                   84
  Rank: Dry to Wet (123 yrs)   36 63 60 48                   38
  Rank: Wet to Dry (123 yrs)   88 61 64 77                   86
    

Station Name:   Oct
2017
Nov
2017
Dec
2017
Jan
2018
Feb
2018
Mar
2018
Apr
2018
May
2018
Jun
2018
Jul
2018
Aug
2018
Sep
2018
  Total for
WY 2017-18
 click on location   D0 D1                              
 for graph D2 D3 D4                              
Jeffrey City  None   0.22 0.26 0.62 0.57                   1.67
  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    2.23
  Percent of Normal    24 44 148 184                   75
Snowfall   4.0 1.0 8.0 8.5                   21.5
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    24.0
  Percent of Normal    55 15 145 185                    90

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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 February 2018 will be available on March 7, 2018*
* 2018 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) 3.39  Statewide Average (°F) 27.9
 20th Century Average 3.10  20th Century Average 22.7
 Rank - Driest  to Wettest  (123 Years) 86  Rank - Warmest  to Coldest (123 Years) 4
 Rank - Wettest to Driest (123 Years) 38  Rank - Coldest to Warmest (123 Years) 120
 Driest Period on Record: Nov 1930 - Jan 1931 1.34  Warmest Period on Record:  Nov 1980 - Jan 1981 29.6
 Wettest Period on Record: Nov 1942 - Jan 1943 5.43  Coldest Period on Record: Nov 1978 - Jan 1979 13.2

 

Wyoming: Last 12 Months

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) 17.88  Statewide Average (°F) 43.9
 20th Century Average 15.93  20th Century Average 40.7
 Rank - Driest  to Wettest  (123 Years) 98  Rank - Warmest  to Coldest (123 Years) 3
 Rank - Wettest to Driest (123 Years) 26  Rank - Coldest to Warmest (123 Years) 121
 Driest Period on Record: Feb 2012 - Jan 2013 10.78  Warmest Period on Record:  Feb 2012 - Jan 2013 44.4

 Wettest Period on Record: Feb 1995 - Jan 1996

20.83  Coldest Period on Record: Feb 1929 - Jan 1930 37.8

Last 5 Years (February 2013 - January 2018)

Precipitation - Percent of Normal Temperature - Departure from Normal
Map Not Available For This Period Map Not Available For This Period
 Statewide Average (inches) 87.21  Statewide Average (°F) 43.1
 20th Century Average 79.51  20th Century Average  40.7
 Rank - Driest  to Wettest  (119 Periods) 107  Rank - Warmest  to Coldest (119 Periods) 2
 Rank - Wettest to Driest  (119 Periods) 13  Rank - Coldest to Warmest (119 Periods) 118
 Driest Period on Record: Feb 2000 - Jan 2005 67.65  Warmest Period on Record: Feb 2012 - Jan 2017 43.2
 Wettest Period on Record: Feb 1995 - Jan 2000 91.18  Coldest Period on Record: Feb 1895 - Jan 1900
                         
              Feb 1912 - Jan 1917
39.2