National Weather Service United States Department of Commerce

Atmospheric River to Begin to Impact the Northwest U.S.; Gusty Winds in the Northeast U.S.

A strong atmospheric river moving into northern California later Tuesday will bring a threat for moderate to heavy rainfall and flooding, gusty to high winds, and mountain snows for parts of the Northwest U.S. through at least Wednesday. Gusty winds and isolated rain and snow showers will continue in the Northeast U.S. Tuesday behind a cold front. Read More >

Western and Central Wyoming

Weather Forecast Office

2015 - Wyoming Annual Climate Summary

Weather.gov > Western and Central Wyoming > 2015 - Wyoming Annual Climate Summary
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Wyoming 2015 Climate      |      Click on Image to Enlarge
Drought Conditions listed are from the last release of the Drought Monitor in 2015

Wyoming: 2015
Precipitation - Percent of Normal Temperature - Departure from Normal
 Statewide Average (inches) 16.62  Statewide Average (°F) 44.2
 20th Century Average 15.94  20th Century Average 40.8
 Rank - Driest  to Wettest  (121 Years)  75th  Rank - Warmest  to Coldest (121 Years) 3rd
 Rank - Wettest to Driest (121 Years) 47th  Rank - Coldest to Warmest (121 Years) 119th
 Driest Period on Record: Jan - Dec 2012 10.96  Warmest Period on Record: Jan - Dec 2012 44.8
 Wettest Period on Record: Jan - Dec 1927 20.50  Coldest Period on Record: Jan - Dec 1895 37.9
 
State: Wyoming
(statewide averages)		   Jan
2015		 Feb
2015		 Mar
2015		 Apr
2015		 May
2015		 Jun
2015		 Jul
2015		 Aug
2015		 Sep
2015		 Oct
2015		 Nov
2015		 Dec
2015		   Jan-Dec
2015
Average Temperature ºF   25.7 28.4 37.7 41.3 47.0 63.0 63.9 64.4 59.5 48.7 29.2 21.3   44.2
  20th Century Average    18.4 22.3 29.1 38.8 48.4 57.6 65.3 63.4 53.6 42.5 29.0 20.6    40.8
  Departure ºF    7.3  6.1 8.6 2.5 -1.4 5.4 -1.4 1.0 5.9 6.2 0.2 0.7   3.4
Rank - Warmest to  Coldest
(1895-2015; 121 Years)		   7th 8th 4th 31st 82nd 3rd 92nd 41st 2nd 2nd 58th 63rd   3rd
State: Wyoming
(statewide averages)		   Jan
2015		 Feb
2015		 Mar
2015		 Apr
2015		 May
2015		 Jun
2015		 Jul
2015		 Aug
2015		 Sep
2015		 Oct
2015		 Nov
2015		 Dec
2015		   Jan-Dec
2015
 Average Precipitation    0.61  0.93  0.57 1.70 4.58 1.89 1.54 0.91 0.64 1.11 1.09 1.05    16.62
20th Century Average   1.06 0.97 1.25 1.77 2.21 1.84 1.28 1.07 1.24 1.20 1.03 1.01    15.94
  Departure     -0.45  -0.04 -0.68 -0.07 2.37 0.05 0.26 -0.16 -0.60 -0.09 0.06 0.04   0.68
Rank - Driest  to Wettest 
(1895-2015; 121 Years)		   18th 65th 2nd 61st 118th 68th 91st 54th 25th 54th 72nd 68th   75th
                               
  Wyoming's  Top Ten Driest Years on Record (1895-2015)
Rank Year Precpitation (inches)
1 2012 10.96
2 1939 11.26
3 1988 11.42
4 1910 11.66
5 1902 11.74
6 2001 11.91
7 2002 11.97
8 1934 12.00
9 1960 12.02
10 1954 12.08
75 2015 16.62
  Wyoming's Top Ten Warmest Years on Record (1895-2015)
Rank Year Average Temperature °F
1 2012 44.8
2 1934 44.6
3 2015 44.2
4 1981 43.7
5 2007 43.3
6 2006, 2001, 1999 43.2
9 2003 43.1
10 1954 43.0
   
   Wyoming's Top Ten Wettest Years on Record (1895-2015)
Rank Year Precipitation (inches)
1 1927 20.50
2 1995 20.28
3 1941 20.24
4 1923 19.98
5 1945 19.78
6 1998 19.57
7 1982 19.50
8 1915 19.37
9 1967 19.14
10 1906 19.05
47 2015 16.62
   Wyoming's Top Ten Coldest Years on Record
 (1895-2015)
Rank Year Average Temperature °F
1 1895 37.9
2 1912 38.0
3 1916 38.2
4 1929 38.4
5 1899 38.5
6 1917 38.6
7 1951, 1924 38.7
9 1903 38.8
10 1993 38.9
119 2015 44.2

Wyoming Climate Divisions: 2015
Wyoming Climate Divisions Map - Click to Enlarge

Wyoming Climate Division Rankings: Jan - Dec 2015
Precipitation Rankings
Driest to Wettest 121 Years		 Temperature Rankings
Coldest to Warmest 121 Years
Wyoming Climate Divisions: 2015 Precipitation Rankings (Click to Enlarge) Wyoming Climate Divisions: 2015 Temperature Rankings (Click to Enlarge)
Climate Division 1 - Yellowstone Drainage
2015 (January - December)
Precipitation - Percent of Normal Temperature - Departure from Normal
 Division 1 Average (inches) 25.45  Division 1 Average (°F) 39.2
 20th Century Average 27.55  20th Century Average 35.4
 Rank - Driest  to Wettest  (121 Years) 34th  Rank - Warmest  to Coldest (121 Years) 2nd
 Rank - Wettest to Driest (121 Years) 88th  Rank - Coldest to Warmest (121 Years) 120th
 Driest Periods on Record: Jan - Dec 1919 18.15  Warmest Period on Record: Jan - Dec 1934  39.6
 Wettest Period on Record: Jan - Dec 1996  36.84  Coldest Period on Record: Jan - Dec 1916 32.6
Station Name:
Division 1		 Drought
Conditions		   Jan
2015		 Feb
2015		 Mar
2015		 Apr
2015		 May
2015		 Jun
2015		 Jul
2015		 Aug
2015		 Sep
2015		 Oct
2015		 Nov
2015		 Dec
2015		   Total for
2015
 click on location   D0 D1                              
 for graph D2 D3 D4                              
Old Faithful  D0   1.23 0.75 0.77 0.94 3.75 1.24 2.14 1.58 2.65 1.21 2.49 3.07   21.82
  1981-2010 Normals    2.11 1.99 2.21 2.21 2.80 2.47 1.55 1.46 1.46 1.66 2.29 3.16    25.37
  Percent of Normal     58  38 35 43 134 50 138 108 182 73 109 97   86
Snowfall    30.0  6.0  1.0 3.5 T 0.0 0.0 0.0 0.0 T 20.5 47.5    108.5
1981-2010 Normals   37.5 31.1 26.8 19.3 7.3 1.2 0.0 0.0 1.4 7.7 31.7 43.8    207.8
  Percent of Normal     80  19 4 18 0 0 0 0 0 0 65 108   52
                               
Climate Division 2 - Snake Drainage
2015 (January - December)
Precipitation - Percent of Normal Temperature - Departure from Normal
 Division 2 Average (inches) 30.12  Division 2 Average (°F) 38.1
 20th Century Average 33.13  20th Century Average 35.1
 Rank - Driest  to Wettest  (121 Years) 39th  Rank - Warmest  to Coldest (121 Years) 2nd
 Rank - Wettest to Driest (121 Years) 83rd  Rank - Coldest to Warmest (121 Years) 120th
 Driest Periods on Record: Jan - Dec 1939 22.40  Warmest Period on Record: Jan - Dec 1934  39.3
 Wettest Period on Record: Jan - Dec 1996  46.61  Coldest Period on Record: Jan - Dec 1911 32.7
v
Station Name:
Division 2		 Drought
Conditions		   Jan
2015		 Feb
2015		 Mar
2015		 Apr
2015		 May
2015		 Jun
2015		 Jul
2015		 Aug
2015		 Sep
2015		 Oct
2015		 Nov
2015		 Dec
2015		   Total for
2015
 click on location   D0 D1                              
 for graph D2 D3 D4                              
Afton  None   0.58 0.88 0.62 1.47 4.84 1.36 1.53 1.22 2.20 0.63 1.32 1.02   17.67
  1981-2010 Normals   1.40 1.09 1.40 1.54 2.26 1.97 1.43 1.25 1.46 1.63 2.04 1.25   18.16
  Percent of Normal    41  81 44 95 214 69 107 98 151 39 89 82   97
Snowfall    9.6  6.5 5.9 6.7 0.0 0.0 0.0 0.0 0.0 0.0 15.3 20.2   64.2
                               
Moose   None   2.31 1.57 0.67 0.80 3.83 1.03 2.72 1.56 2.65 1.94 2.11 3.93    25.12
  1981-2010 Normals   2.58 1.82 1.62 1.49 1.88 1.61 1.29 1.29 1.44 1.47 2.64 2.67    21.80
  Percent of Normal    90  86 41 54 204 64 211 121 184 132 80 147   115
Snowfall    26.0  19.1 11.0 5.4 0.0 0.0 0.0 0.0 0.0 0.1 17.8 42.8    122.2
1981-2010 Normals   36.9 26.6 15.9 7.4 2.2 0.0 0.0 0.0 0.2 4.8 24.1 44.7    162.8
  Percent of Normal     70  72 69 73 0 0 0 0 0 2 74 96   75
                               
Climate Division 3 - Green and Bear Drainages
2015 (January - December)
Precipitation - Percent of Normal Temperature - Departure from Normal
 Division 3 Average (inches) 14.25  Division 3 Average (°F) 42.3
 20th Century Average 13.69  20th Century Average 38.6
 Rank - Driest  to Wettest  (121 Years) 74th  Rank - Warmest  to Coldest (121 Years) 2nd
 Rank - Wettest to Driest (121 Years) 48th  Rank - Coldest to Warmest (121 Years) 120th
 Driest Periods on Record: Jan - Dec 1910 8.40  Warmest Period on Record: Jan - Dec 1934 42.6
 Wettest Period on Record: Jan - Dec 1983  20.51  Coldest Period on Record: Jan - Dec 1895 34.5
v
Station Name:
Division 3		 Drought
Conditions		   Jan
2015		 Feb
2015		 Mar
2015		 Apr
2015		 May
2015		 Jun
2015		 Jul
2015		 Aug
2015		 Sep
2015		 Oct
2015		 Nov
2015		 Dec
2015		   Total for
2015
 click on location   D0 D1                              
 for graph D2 D3 D4                              
Big Piney  D0   0.01 0.05 0.06 0.56 2.30 0.23 1.73 0.39 0.30 0.71 0.42 0.11   6.87
1981-2010 Normals    0.31  0.35  0.44  0.53  0.84 0.79  0.71  0.69  0.78  0.53  0.21  0.30    6.48
Percent of Normal     3  14 14 106 274 29 244 57 38 134 200 37    106
                               
Evanston   D0   0.64 0.37 0.44 0.57 4.49 0.64 0.88 0.88 0.88 0.42 0.16 0.41   10.78
  1981-2010 Normals   0.54 0.61 0.86 1.15 1.77 1.24 0.90 0.96 1.31 1.17 1.04 0.58    12.13
  Percent of Normal     119  61 51 50 254 52 98 92 67 36 15 71    89
                               
Rock Springs  D0   0.01 0.08 0.22 0.67 3.10 1.11 2.12 0.37 0.58 0.15 0.17 0.04   8.62
 1981-2010 Normals    0.45  0.48  0.68  0.91  1.21  0.79  0.64  0.62  0.92  0.87  0.49  0.50    8.56
  Percent of Normal     0.4  17 32 74 256 141 331 60 63 17 35 8    101
                               
Bitter Creek 4NE D0   0.09 0.13 0.70 0.34 3.82 1.54 2.57 0.13 0.61 0.32 0.38 0.34   10.95
  1981-2010 Normals   0.28 0.36 0.30 0.65 1.09 0.70 0.60 0.75 0.73 0.66 0.31 0.51    6.94
  Percent of Normal     32 36 233 52 350 220 428 17 84 48 123 67    158
                               
Fossil Butte
National Monument		   D0    0.23 0.51 0.68 0.61 4.90 0.81 0.70 1.18 1.28 0.91 0.72 1.26    13.79
1981-2010 Normals   0.49 0.68 0.82 0.98 1.41 1.03 0.85 0.93 1.10 1.11 0.86 0.74    11.00
  Percent of Normal    47  75 83 62 348 79 82 127 116 82 84  170    125
Snowfall    2.2  4.3 6.0 5.7 3.0 0.0 0.0 0.0 0.0 T 7.6 19.5    48.3
                               
Green River  D0   T 0.30 0.92 1.52 4.67 1.44 1.10 0.74 0.58 0.38 1.18 1.00    13.83
  1981-2010 Normals    0.34  0.43 0.71  0.85 1.23 0.98 0.55  0.68  0.90 0.81 0.41 0.44    8.33
  Percent of Normal    0  70 130 179 380 147 200 109 64 47 288 227    166
Snowfall   T  2.0 7.0 6.5 T 0.0 0.0 0.0 0.0 0.0 9.5  10.3    35.3
1981-2010 Normals   4.6 7.3 5.0 3.9 0.6 0.0 0.0 0.0 0.0 0.5 3.8 6.5   32.2
Percent of Normal   0  27 140 167 0 0 0 0 0 0 250 158    110
Climate Division 4 - Big Horn Drainage
2015 (January - December)
Precipitation - Percent of Normal Temperature - Departure from Normal
 Division 4 Average (inches) 14.01  Division 4 Average (°F) 44.8
 20th Century Average 15.02  20th Century Average 41.1
 Rank - Driest  to Wettest  (121 Years) 41st  Rank - Warmest  to Coldest (121 Years) 3rd
 Rank - Wettest to Driest (121 Years) 81st  Rank - Coldest to Warmest (121 Years) 119th
 Driest Periods on Record: Jan - Dec 1919 8.99  Warmest Period on Record: Jan - Dec  1934  45.3
 Wettest Period on Record: Jan - Dec 1941  20.42  Coldest Period on Record: Jan - Dec 1916 37.3
v v
Station Name:
Division 4		 Drought
Conditions		   Jan
2015		 Feb
2015		 Mar
2015		 Apr
2015		 May
2015		 Jun
2015		 Jul
2015		 Aug
2015		 Sep
2015		 Oct
2015		 Nov
2015		 Dec
2015		   Total for
2015
 click on location   D0 D1                              
 for graph D2 D3 D4                              
Greybull   D1   0.22 0.04 0.14 0.11 1.07 0.25 T 0.09 0.01 0.24 0.25 0.01   2.43
  1981-2010 Normals    0.23  0.18  0.40  0.71  1.65  1.20  0.66  0.42  0.88  0.60  0.30  0.28    7.51
  Percent of Normal     96 22 35 15 65 21 0 21 1 40 83 4   32
                               
Worland D0   0.23 0.54 T 0.35 3.06 1.06 0.41 0.47 0.13 0.33 0.68 0.28    7.54
  1981-2010 Normals    0.23 0.19 0.46 0.86 1.42 1.15 0.71 0.43 0.85 0.69 0.35 0.23    7.57
  Percent of Normal     100  284 0 41 215 92 58 109 15 48 194 122    100
                               
Cody  None   0.10 0.87 0.20 1.66 5.10 0.92 0.52 0.52 0.13 1.86 0.47 0.50   12.85
  1981-2010 Normals   0.33 0.33 0.56 1.06 1.82 1.68 1.11 0.91 1.06 0.89 0.48 0.33    10.56
  Percent of Normal     30  264 36 157 280 55 47 57 12 209 98 152    122
Snowfall    2.0  7.0 1.5 4.0 0.0 0.0 T 0.0 0.0 0.0 4.9 4.1   23.5
1981-2010 Normals   7.8 6.7 6.9 6.3 0.8 0.0 0.0 0.0 0.2 4.3 6.3 8.0   47.3
  Percent of Normal     26  104 22 63 0 0 0 0 0 0 78 51    50
                               
Powell Field Station   None   0.04 0.03 0.09 0.39 2.13 0.60 0.32 0.47 T 0.88 0.18 0.11    5.24
  1981-2010 Normals   0.21 0.13 0.29 0.51 1.40 1.35 0.87 0.52  0.65 0.56 0.18 0.13    6.80
  Percent of Normal     19  23 31 76 152 44 37 90 0 157 100 85   77
Snowfall    0.3  0.3 0.1 T 0.0 0.0 0.0 0.0 0.0 0.0  2.0 0.6   3.3
1981-2010 Normals   2.3 0.5 2.5 0.5 0.5 0.0 0.0 0.0 0.1  1.2 1.3 1.2   10.1
  Percent of Normal     13  60 4 0 0 0 0 0 0 0 154 50    33
                               
Thermopolis   None   0.14 0.92 0.06 1.60 4.54 1.50 0.38  0.70 T 1.25 0.82 0.55   12.46
  1981-2010 Normals   0.35 0.45 0.87 1.46 1.86 1.51 0.88 0.58 1.23 1.26 0.80 0.46    11.71
  Percent of Normal     40  204 7 110 244 99 43 121 0 99 103 120    106
Snowfall    3.0  3.5 1.0 T 0.0 0.0 0.0 0.0 0.0 0.0  5.0  13.0    25.5
1981-2010 Normals   5.6  4.6 2.5 2.8 0.4 0.0 0.0 0.0 0.2 2.4 3.7 4.5   26.7
  Percent of Normal     54  76 40 0 0 0 0 0 0 0 135 289    96
Climate Division 5 - Powder and Tongue Drainages
2015 (January - December)
Precipitation - Percent of Normal Temperature - Departure from Normal
 Climate Division 5 Average (inches) 15.40  Climate Division 5 Average (°F) 46.5
 20th Century Average 15.29  20th Century Average 43.0
 Rank - Driest  to Wettest  (121 Years) 64th  Rank - Warmest  to Coldest (121 Years) 3rd
 Rank - Wettest to Driest (121 Years) 58th  Rank - Coldest to Warmest (121 Years) 119th
 Driest Periods on Record: Jan - Dec 1960 9.32  Warmest Period on Record: Jan - Dec 2012 47.2
 Wettest Period on Record: Jan - Dec 1923  22.25  Coldest Period on Record: Jan - Dec 1916 39.8
Station Name:
Division 5		 Drought
Conditions		   Jan
2015		 Feb
2015		 Mar
2015		 Apr
2015		 May
2015		 Jun
2015		 Jul
2015		 Aug
2015		 Sep
2015		 Oct
2015		 Nov
2015		 Dec
2015		   Total for
2015
 click on location   D0 D1                              
 for graph D2 D3 D4                              
Buffalo D1    0.16 0.48 0.08 0.78 5.76 3.23 0.77 1.15 0.11 0.71 0.44 0.10   13.77
1981-2010 Normals    0.42  0.35  0.92  1.30  2.53  2.28  1.66  0.81  1.31  0.93  0.54  0.40    13.45
  Percent of Normal     38  137 9 60 228 142 46 142 8 76 81 25    102
                               
Sheridan   D1   0.45 1.28 0.40 1.43 5.42 3.05 0.84 0.60 0.27 1.22 0.69 0.24   15.89
  1981-2010 Normals    0.56  0.54  0.98  1.60  2.35 2.12  1.18  0.72  1.43  1.41  0.71  0.56   14.16
  Percent of Normal     80  237 41 89 231 144 71 83 19 87 97 43    112
Climate Division 6 - Belle Fourche Drainage
2015 (January - December)
Precipitation - Percent of Normal Temperature - Departure from Normal
 Climate Division 6 Average (inches) 16.71  Climate Division 6 Average (°F) 46.3
 20th Century Average 16.35  20th Century Average 43.0
 Rank - Driest  to Wettest  (121 Years) 67th  Rank - Warmest  to Coldest (121 Years) 4th
 Rank - Wettest to Driest (121 Years) 55th  Rank - Coldest to Warmest (121 Years) 118th
 Driest Periods on Record: Jan - Dec 1936 10.36  Warmest Period on Record: Jan - Dec 2012  47.7
 Wettest Period on Record: Jan - Dec 1915  24.01  Coldest Period on Record: Jan - Dec 1917, 1916 39.8
Station Name:
Division 6		 Drought
Conditions		   Jan
2015		 Feb
2015		 Mar
2015		 Apr
2015		 May
2015		 Jun
2015		 Jul
2015		 Aug
2015		 Sep
2015		 Oct
2015		 Nov
2015		 Dec
2015		   Total for
2015
 click on location   D0 D1                              
 for graph D2 D3 D4                              
Gillette   D0   0.28 0.57 0.45 1.20 4.62 3.11 1.04 1.87 0.16 0.87 0.47 0.48   15.12
1981-2010 Normals    0.39 0.39  0.96  1.47  2.45 2.21  1.66  0.95  1.19  1.27  0.55  0.40    13.89
  Percent of Normal     72 146 47 82 189 141 63 197 13 69 85  120    109
Climate Division 7 - Cheyenne and Niobrara Drainages
2015 (January - November)
Precipitation - Percent of Normal Temperature - Departure from Normal
 Climate Division 7 Average (inches) 18.13  Climate Division 7 Average (°F) 46.9
 20th Century Average 14.31  20th Century Average 44.3
 Rank - Driest  to Wettest  (121 Years) 114th  Rank - Warmest  to Coldest (121 Years) 6th
 Rank - Wettest to Driest (121 Years) 8th  Rank - Coldest to Warmest (121 Years) 116th
 Driest Periods on Record: Jan - Dec 2012 8.04  Warmest Period on Record: Jan - Dec 2012  48.7
 Wettest Period on Record: Jan - Dec 1915 21.88  Coldest Period on Record: Jan - Dec 1899 40.1
Climate Division 8 - Lower Platte Drainage
2015 (January - December)
Precipitation - Percent of Normal Temperature - Departure from Normal
 Climate Division 8 Average (inches) 17.68  Climate Division 8 Average (°F) 47.0
 20th Century Average 14.88  20th Century Average 43.9
 Rank - Driest  to Wettest  (121 Years) 102nd  Rank - Warmest  to Coldest (121 Years) 3rd
 Rank - Wettest to Driest (121 Years) 20th  Rank - Coldest to Warmest (121 Years) 119th
 Driest Periods on Record: Jan - Dec 2012 8.20  Warmest Period on Record: Jan - Dec 2012  48.5
 Wettest Period on Record: Jan - Dec 1915 22.18  Coldest Period on Record: Jan - Dec 1899 40.3
Station Name:
Division 8		 Drought
Conditions		   Jan
2015		 Feb
2015		 Mar
2015		 Apr
2015		 May
2015		 Jun
2015		 Jul
2015		 Aug
2015		 Sep
2015		 Oct
2015		 Nov
2015		 Dec
2015		   Total for
2015
 click on location   D0 D1                              
 for graph D2 D3 D4                              
Casper   D0   0.52 0.79 0.64 1.66 3.89 1.50 0.57 0.83 0.19 0.94 0.70 1.06   13.29
1981-2010 Normals    0.51 0.57  0.82  1.29  2.02  1.61  1.41  0.85  1.08  1.11  0.76  0.49    12.52
  Percent of Normal     102 139 78 129 193 93 40 98 18 85 92 216    106
Snowfall   6.4  12.4 9.3 4.7 6.3 0.0 0.0 0.0 0.0 0.0 13.3  16.8   69.2
1981-2010 Normals   9.1 9.8 10.9 11.6 2.9 0.1 0.0 0.0 1.8 7.4  10.3 11.0   74.9
  Percent of Normal     70  127 85 41 217 0 0 0 0 0 129  153    92
                               
Cheyenne  None   0.06 0.70 0.11 2.72 5.99 1.53 1.85 0.65 0.14 1.82 1.11 0.85   17.54
  1981-2010 Normals    0.33  0.47  1.05  1.78  2.34  2.34  2.19 1.95  1.48  0.93  0.59  0.49   15.94
  Percent of Normal     18  149 10 153 256 65 84 33 9  196 188  173    110
Snowfall    0.8  9.5 1.7 15.4 4.4 0.0 0.0 0.0 0.0 T 10.7 15.1   57.6
1981-2010 Normals   5.9 7.9 11.3 10.2 2.3 0.0 0.0 0.0 1.3 5.0  8.0 8.4    60.3
  Percent of Normal     14  120 15 151 191 0 0 0 0 0 134 180   96
                               
Climate Division 9 - Wind River Drainage
2015 (January - December)
Precipitation - Percent of Normal Temperature - Departure from Normal
 Climate Division 9 Average (inches) 15.03  Climate Division 9 Average (°F) 43.3
 20th Century Average 14.94  20th Century Average 40.1
 Rank - Driest  to Wettest  (121 Years) 71st  Rank - Warmest  to Coldest (121 Years) 3rd
 Rank - Wettest to Driest (121 Years) 51st  Rank - Coldest to Warmest (121 Years) 119th
 Driest Periods on Record: Jan - Dec 1902 8.59  Warmest Period on Record: Jan - Dec 2012  44.1
 Wettest Period on Record: Jan - Dec 1941  21.24  Coldest Period on Record: Jan - Dec 1916 37.2
Station Name:
Division 9		 Drought
Conditions		   Jan
2015		 Feb
2015		 Mar
2015		 Apr
2015		 May
2015		 Jun
2015		 Jul
2015		 Aug
2015		 Sep
2015		 Oct
2015		 Nov
2015		 Dec
2015		   Total for
2015
 click on location   D0 D1                              
 for graph D2 D3 D4                              
Lander  None   T 1.56 0.55 2.31 6.10 0.80 0.50 0.58 0.17 0.88 1.20 0.48   15.13
  1981-2010 Normals    0.41  0.58  1.16  1.87  2.20  1.27  0.78 0.61  1.05  1.29  0.86  0.58   12.66
  Percent of Normal     0  269 47 124 277 63 64 95 16 68  140 83    120
Snowfall    0.3  23.6 8.9 10.3 0.8 0.0 0.0 0.0 0.0 0.0 19.0 8.8   71.7
1981-2010 Normals   7.6 10.3 16.1 16.8 4.8 0.1 0.0 0.0 2.7 9.8  13.1 10.1    91.4
  Percent of Normal     4  229 55 61 17 0 0 0 0 0 145 87   78
                               
Riverton  D0   0.03 1.04 0.41 0.82 4.55 0.79 1.10 0.06 0.02 0.33  1.00 0.08    10.23
  1981-2010 Normals    0.24  0.27  0.55  1.30  1.72  1.28  0.89  0.57  0.90  0.89  0.50  0.32    9.43
  Percent of Normal     13  385 75 63 265 62 124 11 2  37 200 25   108
Snowfall    0.4  15.8 6.7 3.3 0.5 0.0  0.0 0.0 0.0 0.0  18.1  2.2    47.0
                               
Dubois  None   0.15 0.46 0.35 0.55 3.28 1.31 1.62 0.88 0.30 1.29 0.51 0.22    10.92
  1981-2010 Normals   0.24 0.38 0.40 1.10 1.64 1.28 1.11 0.86 1.24 0.81 0.57 0.28    9.91
  Percent of Normal     63  121 88 50 200 102 146 102 24 159 89 79    110
Snowfall    2.0  10.6 5.5 4.5 T 0.0 0.0 0.0 0.0 1.0 9.5 4.5   37.6
1981-2010 Normals   3.9 5.7 6.0 8.5 3.9 0.6 0.0 0.0 2.6 3.0 5.8 5.1   45.1
  Percent of Normal     51  186 92 53 0 0 0 0 0 33 164 88   83
                               
Riverton (downtown)  D0   0.04 1.28 0.47 1.10 4.03 0.82 0.81 0.17 0.10 0.38 0.99 0.09   10.28
  1981-2010 Normals   0.28 0.33 0.56 0.98 1.45 1.21 0.78 0.50 0.83 0.85 0.41 0.24    8.42
  Percent of Normal     14  388 84 112 278 68 104 34 12 45  241 38    122
Snowfall    0.7  17.8 6.6 1.8 T 0.0 0.0 0.0 0.0  0.0 19.0 2.4   48.3
1981-2010 Normals    4.8  6.0  5.9  6.1 1.2 0.0 0.0 0.0 0.3 3.7 4.3 4.8   37.1
  Percent of Normal     15  297 112 30 0 0 0 0 0 0  442  50   130
Climate Division 10 - Upper Platte Drainage
2015 (January - December)
Precipitation - Percent of Normal Temperature - Departure from Normal
 Statewide Average (inches) 14.00  Statewide Average (°F) 43.6
 20th Century Average 13.19  20th Century Average 40.0
 Rank - Driest  to Wettest  (121 Years) 83rd  Rank - Warmest  to Coldest (121 Years) 2nd
 Rank - Wettest to Driest (121 Years) 39th  Rank - Coldest to Warmest (121 Years) 120th
 Driest Periods on Record: Jan - Dec 1902 7.84  Warmest Period on Record: Jan - Dec 2012  44.4
 Wettest Period on Record: Jan - Dec 1995  18.07  Coldest Period on Record: Jan - Dec 1896 36.5
Station Name:
Division 10		 Drought
Conditions		   Jan
2015		 Feb
2015		 Mar
2015		 Apr
2015		 May
2015		 Jun
2015		 Jul
2015		 Aug
2015		 Sep
2015		 Oct
2015		 Nov
2015		 Dec
2015		   Total for
2015
 click on location   D0 D1                              
 for graph D2 D3 D4                              
Jeffrey City  D0   0.20 0.40 0.79 1.94 4.70 0.67 1.00 0.29 0.39 0.08 0.78 0.30    11.54
  1981-2010 Normals    0.31  0.41 0.86  1.27 1.85 1.15 0.89  0.60  0.80 0.91 0.59 0.42    10.06
  Percent of Normal    65  98 92 153 254 58 112 48 49 73 132 71    115
Snowfall   3.0  7.0 9.0 20.0 7.0 0.0 0.0 0.0 0.0 0.0 10.0 4.0   60.0
1981-2010 Normals   4.6 6.7 9.4 10.2 4.9 0.4 0.0 0.0 1.4 7.3 6.6 5.5    57.0
  Percent of Normal    65  104 96 196 143 0 0 0 0 0  152 73    105
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