Wyoming 2017 Climate Summary

...2017 Highlights for Wyoming...

• Annual: 7th warmest year on 123 years of record (1895-2017), 14th wettest year on record with 117 percent of normal precipitation.
• Seasonal:  Wettest January - April (first four months of the year)  on record with statewide average precipitation of 8.36 inches which was 165 percent of normal.
• Monthly Temperatures: 4th warmest March, 8th warmest July, 8th warmest November on record.  6 months had above or much above normal monthly average temperatures, 4 months  were near normal, January and October were below normal.    
• Monthly Precipitation: 8th wettest January, 5th wettest February, 9th wettest April and 10th wettest September on record.  6 months had above or much above normal statewide average precipitation, 3 months had below or much below normal statewide average precipitation, 3 months had near normal monthly average precipitation.
• Climate Divisions: Climate Division 1 - Yellowstone and Division 9 - Wind River Basin recorded their wettest year on 123 years of record.

2017 Wyoming Climate      |      Click on Images to Enlarge Wyoming: 2017 Precipitation - Percent of Normal Temperature - Departure from Normal Climate Division: Wyoming (Statewide Averages)   Jan 2017 Feb 2017 Mar 2017 Apr 2017 May 2017 Jun 2017 Jul 2017 Aug 2017 Sep 2017 Oct 2017 Nov 2017 Dec 2017   Total for 2017   Average Temperature   16.7 27.7 38.3 40.1 49.2 60.0 68.9 63.5 54.2 41.0 34.6 24.4   43.2   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 from Average   -1.7 5.4 9.2 1.3 0.8 2.4 3.6 0.1 0.6 -1.6 5.6 3.8   2.4   Rank: Warm to Cold (123 yrs)    91 15 4 45 53 30 8 65 56 91 8 21   7   Rank: Cold to Warm (123 yrs)    32 109 120 79 71 94 116 59 68 33 116 103   117   Precipitation    1.66 2.02 1.88 2.80 1.80 1.09 0.97 0.94 2.21 0.78 1.48 0.97   18.60   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    15.93   Percent of Average    156 208 150 158 81 59 76 88 178 65 144 96   117   Rank: Dry to Wet (123 yrs)   115 119 110 115 45 25 35 58 114 33 18 59   110   Rank: Wet to Dry (123 yrs)   8 5 14 9 79 99 89 66 10 91 106 65   14      Wyoming Climate Divisions: 2017 Wyoming Climate Division Rankings: 2017 Precipitation Rankings Driest to Wettest 123 Years Temperature Rankings Coldest to Warmest 123 Years Climate Division 1 - Yellowstone Drainage Climate Division: Yellowstone (Division Averages)   Jan 2017 Feb 2017 Mar 2017 Apr 2017 May 2017 Jun 2017 Jul 2017 Aug 2017 Sep 2017 Oct 2017 Nov 2017 Dec 2017   Total for 2017   Average Temperature   13.8 24.1 34.3 35.4 44.4 52.2 61.5 57.5 48.3 36.2 27.9 19.9   38.0   20th Century Average   15.2 18.9 24.3 33.3 42.4 50.3 57.9 56.2 47.4 37.3 24.6 16.9   35.4   Departure from Avegage   -1.4 5.2 10.1 2.1 2.0 1.7 3.6 1.3 0.9 -1.1 3.3 3.0   2.6   Rank: Warm to Cold (123 yrs)    87 15 2 38 31 30 7 37 48 85 25 28   5   Rank: Cold to Warm (123 yrs)    36 109 122 86 93 94 117 87 76 39 99 96   119   Precipitation    3.21 5.61 3.60 4.09 1.49 2.18 1.46 1.03 4.68 1.31 5.54 2.87   37.07   20th Century Average   2.89 2.26 2.61 2.47 2.84 2.57 1.61 1.51 1.80 1.88 2.49 2.63    27.56   Percent of Average    111 248 138 166 52 85 91 68 260 70 222 109   135   Rank: Dry to Wet (123 yrs)   79 122 100 119 9 55 64 42 122 39 119 73   123   Rank: Wet to Dry (123 yrs)   44 2 24 5 115 69 60 82 2 85 5 51   1      Station Name:   Jan 2017 Feb 2017 Mar 2017 Apr 2017 May 2017 Jun 2017 Jul 2017 Aug 2017 Sep 2017 Oct 2017 Nov 2017 Dec 2017   Total for 2017  click on location   D0 D1                                for graph D2 D3 D4                               Old Faithful None   2.88 7.27 2.16 2.04 0.92 2.25 1.55 0.50 5.50 1.62 5.47 2.10   34.26   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     136 365 98 92 33 91 100 34 377 98 239 66   135 Snowfall    47.0  68.0 18.0 20.0 4.0 0.0 0.0 0.0 4.0 8.5 45.5 43.5   258.5 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     125 219 67 104 55 0 0 0 286 110 144 99   124                                 Climate Division 2 - Snake Drainage Climate Division: Snake (Division Averages)   Jan 2017 Feb 2017 Mar 2017 Apr 2017 May 2017 Jun 2017 Jul 2017 Aug 2017 Sep 2017 Oct 2017 Nov 2017 Dec 2017   Total for 2017   Average Temperature   12.4 24.4 32.7 33.4 43.3 51.5 60.6 56.8 47.7 35.2 27.8 19.6   37.1   20th Century Average   14.7 18.3 23.6 33.0 42.3 50.0 57.7 56.0 47.5 37.4 24.3 16.0   35.1   Departure from Avegage   -2.3 6.1 9.1 0.4 1.0 1.5 2.9 0.8 0.2 -2.2 3.5 3.6   2.1   Rank: Warm to Cold (123 yrs)    93 11 2 57 46 37 11 49 65 96 24 21   9   Rank: Cold to Warm (123 yrs)    30 113 122 67 78 87 113 75 59 28 100 103   115   Precipitation    5.44 8.86 4.49 4.31 1.24 2.76 1.03 0.69 4.44 1.63 6.35 2.45   43.69   20th Century Average   4.34 3.59 3.45 2.81 2.91 2.31 1.32 1.46 1.77 2.12 3.33 3.72    33.13   Percent of Average   125 247 130 153 43 119 78 47 251 77 191 66   132   Rank: Dry to Wet (123 yrs)   93 122 95 113 9 87 55 30 121 46 115 30   120   Rank: Wet to Dry (123 yrs)   30 2 29 11 115 37 69 94 3 78 9 94   4      v v v0.63 Station Name:   Jan 2017 Feb 2017 Mar 2017 Apr 2017 May 2017 Jun 2017 Jul 2017 Aug 2017 Sep 2017 Oct 2017 Nov 2017 Dec 2017   Total for 2017  click on location   D0 D1                                for graph D2 D3 D4                               Afton None   3.07 3.00 1.36 2.99 0.63 0.95 0.31 0.39 4.08 0.64 2.83 1.42   21.67   1981-2010 Normals   1.40 1.09 1.40 1.54 2.26 1.97 1.43 1.25 1.46 1.63 1.48 1.25   18.16   Percent of Normal    219 275 97 194 28 48 22 31 279 39 191 114   119 Snowfall    40.6 23.9 9.7 14.2 0.5 0.0 0.0 0.0 1.0 2.4 5.7 19.6   117.6                                 Moose None   3.39 5.88 2.03 2.79 0.74 3.07 0.64 0.40 3.36 1.00 3.85 1.34   28.49   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    131 308 125 187 39 191 50 31 233 68 146 50   131 Snowfall    44.0  32.9 1.8 17.8 1.1 T 0.0 0.0 0.0 4.1 13.6 15.9    131.2 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     119 114 11 241 2.2 0 0 0 0 85 56 36   81                                 JHMR MId Mtn None                               Snowfall    79.0 124.0 38.0 58.0 7.0 2.0     0.0 22.0 70.0 52.0    452.0 1975-2017 Average   83.0 65.0 55.0 20.0 13.0 2.0     1.0 16.0 33.0 77.0    366.0   Percent of Normal     95 194 69  290 54 100     0 138 212 68   123                                 Climate Division 3 - Green and Bear Drainages v V V Climate Division: Green and Bear (Division Averages)   Jan 2017 Feb 2017 Mar 2017 Apr 2017 May 2017 Jun 2017 Jul 2017 Aug 2017 Sep 2017 Oct 2017 Nov 2017 Dec 2017   Total for 2017   Average Temperature   13.6 24.7 35.3 37.6 47.8 58.5 66.3 62.1 52.3 39.0 33.5 24.6   41.3   20th Century Average   16.2 19.7 27.0 37.0 46.6 55.3 62.8 60.8 51.6 40.7 27.0 18.3   38.6   Departure from Avegage   -2.6 5.0 8.3 0.6 1.2 3.2 3.5 1.3 0.7 -1.7 6.5 6.3   2.7   Rank: Warm to Cold (123 yrs)    97 21 6 55 44 19 8 35 53 94 4 9   5   Rank: Cold to Warm (123 yrs)    26 103 118 69 80 105 116 89 71 30 120 115   119   Precipitation    2.50 2.27 2.15 1.76 1.19 0.45 0.62 0.91 2.24 0.35 1.36 0.81   16.61   20th Century Average   1.15 1.06 1.17 1.37 1.55 1,14 0.94 1.00 1.10 1.16 1.03 1.03    13.70   Percent of Average    217 214 184 128 77 39 66 91 204 30 132 79   121   Rank: Dry to Wet (123 yrs)   119 120 116 93 46 22 36 66 114 13 92 43   110   Rank: Wet to Dry (123 yrs)   4 4 8 31 78 102 88 58 10 111 32 81   14      v v v Station Name:   Jan 2017 Feb 2017 Mar 2017 Apr 2017 May 2017 Jun 2017 Jul 2017 Aug 2017 Sep 2017 Oct 2017 Nov 2017 Dec 2017   Total for 2017  click on location   D0 D1                                for graph D2 D3 D4                               Big Piney Airport  None   0.99 0.75 1.45 1.17 1.10 0.14 0.86 0.64 1.72 0.01 0.25 0.07   9.15 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    319 214 330 221 131 18 121 93 221 2 119 23    141                                 Evanston Airport None   1.08 1.18 0.77 0.31 1.82 0.25 0.10 0.01 T T 1.47 0.07   7.06   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     200 193 90 27 103 20 11 1 0 0 141 12   58                                 Rock Springs Arpt.  None   0.49 0.41  1.43 0.55 0.64 0.02 0.14 0.70 0.77 0.02 0.29 0.11   5.57  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     109 85  210 60 53 3 22 113 84 2 59 22    65                                 Bitter Creek 4NE D0   0.66 0.57  1.46 0.33 0.84 0.04 0.16 0.98 1.07 0.04 0.50 0.32   6.97   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     236 158  487 51 77 6 27 131 147 6 161 63   100                                 Fossil Butte N.M.   None    3.25 2.50  2.76 2.16 0.69 0.59 0.02 1.40 3.22 0.50 1.89 0.86   19.84 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    663 368  337 220 49 57 2 151 293 45 220 116   180 Snowfall    33.6 29.5  6.5 8.2 2.9 T 0.0 0.0 T 1.7 8.5 12.5    104.9                                 Green River None   2.78 2.91  1.75 2.06 1.33 0.17 0.28 1.10 1.70 0.07 0.80 0.60   14.83   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   818 509  246 242 1.08 17 51 162 189 9 195 136   178 Snowfall   30.0 23.8  1.3 3.0 5.0 0.0 0.0 0.0 T T 4.5 6.3    73.9 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   652 326 26 77 833 0 0 0 0 0 118 97    230                                 Rock Springs  None   1.98 1.83  1.91 1.08 0.87 0.26 0.82 0.98 0,94 0.10 0.65 0.49   11.91   1981-2010 Normals    0.44  0.46 0.67  0.91 1.42 0.86 0.73  0.96  1.08 1.09 0.52 0.52    9.66   Percent of Normal    450 398  285 119 61 30 112 102 87 9 125 94   123 Snowfall   19.2 22.0 T 0.0 4.0 0.0 0.0 0.0 0.0 T 1.1 6.9    53.2                                 Climate Division 4 - Big Horn Drainage Climate Division: Big Horn (Division Averages)   Jan 2017 Feb 2017 Mar 2017 Apr 2017 May 2017 Jun 2017 Jul 2017 Aug 2017 Sep 2017 Oct 2017 Nov 2017 Dec 2017   Total for 2017   Average Temperature   15.5 27.6 39.6 41.3 50.6 60.5 69.7 64.2 53.9 41.3 33.2 24.0   43.5   20th Century Average   17.7 22.7 30.2 39.8 49.1 58.1 65.8 63.7 53.5 42.6 29.2 20.6   41.1   Departure from Avegage   -2.2 4.9 9.4 1.5 1.5 2.4 3.9 0.5 0.4 -1.3 4.0 3.4   2.4   Rank: Warm to Cold (123 yrs)    90 25 4 41 39 29 8 56 64 83 22 31   11   Rank: Cold to Warm (123 yrs)    33 99 120 83 85 95 116 68 60 41 102 83   113   Precipitation   1.20 1.65 1.98 3.57 1.60 1.28 0.75 0.70 2.94 0.79 1.41 1.15   17.87   20th Century Average   0.92 0.75 1.12 1.75 2.22 1.92 1.13 0.94 1.31 1.14 0.95 0.87   14.15   Percent of Average   130 220 177 204 72 67 66 74 224 69 148 132   126   Rank: Dry to Wet (123 yrs)   99 119 114 120 36 40 47 50 116 41 103 92   115   Rank: Wet to Dry (123 yrs)   24 5 10 4 88 84 77 74 8 83 21 32   9      v V Station Name:   Jan 2017 Feb 2017 Mar 2017 Apr 2017 May 2017 Jun 2017 Jul 2017 Aug 2017 Sep 2017 Oct 2017 Nov 2017 Dec 2017   Total for 2017  click on location   D0 D1                                for graph D2 D3 D4                               Greybull Airport   None   0.11 0.10 0.30 0.51 0.52 0.28 0.09 0.07 2.00 T 0.21 0.22   4.41   1981-2010 Normals    0.23  0.18  0.40  0.71  1.65  1.20  0.66  0.42  0.88  0.30  0.28  0.60    7.51   Percent of Normal     48 56 75 72 32 23 14 17 227 0 70 79   59                                 Worland Airport None   0.20 0.20 0.98 2.50 0.92 0.36 0.16 0.18 2.07 0.23 0.68 0.44   8.92   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     87 105 213 291 65 31 23 42 244 33 194 191   118                                 Cody  None   1.03 0.81 0.36 3.13 1.62 1.16 1.01 0.53 2.76 0.59 1.04 0.84   14.88   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     312 245 64 295 89 69 91 58 260 66 217 255    141 Snowfall    15.0 12.5 T T 0.0 0.0 T 0.0 0.0 1.0 6.6 9.0   44.1 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     192 187 0 0 0 0 0 0 0 23 105 113   93                                 Powell Field Station   None   0.29 0.47 0.42 1.70 0.78 0.92 0.37 0.13 1.82 0.01 0.25 0.19   7.35   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     138 362 145 333 56 68 43 25 280 2 139 146   108 Snowfall    8.0 6.0 1.0 0.0 0.0 0.0 0.0 0.0 0,0 0.0 0.8 2.0   17.8 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     348  1200 40 0 0 0 0 0 0 0 62 167    176                                 Thermopolis   None   0.50 0.41 3.41 5.02 1.63 0.85 0.52 0.29 2.62 0.70 0.65 0.70   17.30   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     143 91 392 344 88 56 59 50 213 56 81 152   148 Snowfall   12.0 10.0 T 0.0 0.0 0.0 0.0 0.0 0.0 0.0 8.0 11.6    41.6 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     214 217 0 0 0 0 0 0 0 0 216 258   156 Climate Division 5 - Powder and Tongue Drainages v Climate Division: Powder and Tongue (Division Averages)   Jan 2017 Feb 2017 Mar 2017 Apr 2017 May 2017 Jun 2017 Jul 2017 Aug 2017 Sep 2017 Oct 2017 Nov 2017 Dec 2017   Total for 2017   Average Temperature   17.5 29.4 40.4 42.7 51.6 62.2 72.7 66.0 56.1 43.3 35.1 24.5   45.1   20th Century Average   19.6 23.8 31.1 41.2 50.8 60.2 68.2 66.5 55.9 44.6 31.1 22.4   43.0   Departure from Avegage   -2.1 5.6 9.3 1.5 0.8 2.0 4.5 -0.5 0.2 -1.3 4.0 2.1   2.1   Rank: Warm to Cold (123 yrs)   90 23 4 42 51 36 8 74 69 83 28 49   14   Rank: Cold to Warm (123 yrs)   33 101 120 82 73 88 116 50 55 41 96 75   120   Precipitation   0.55 0.57 1.51 4.08 1.80 1.65 0.80 0.74 1.65 0.79 0.85 0.72   15.71   20th Century Average   0.63 0.61 1.05 1.85 2.54 2.35 1.40 0.99 1.28 1.16 0.77 0.65   15.28   Percent of Average    87 93 144 221 71 70 57 75 129 68 110 111   103   Rank: Dry to Wet (123 yrs)   59 65 101 121 28 37 23 49 91 41 81 83   70   Rank: Wet to Dry (123 yrs)   64 62 23 3 96 87 101 75 33 83 43 41   54      v v2.021.99 V Station Name:   Jan 2017 Feb 2017 Mar 2017 Apr 2017 May 2017 Jun 2017 Jul 2017 Aug 2017 Sep 2017 Oct 2017 Nov 2017 Dec 2017   Total for 2017  click on location   D0 D1                                for graph D2 D3 D4                               Buffalo Airport None    0.10  0.33 2.02 3.18 2.65 1.70 1.41 0.51 1.79 0.27 0.61 0.32   14.89 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     24  94 220 245 105 75 85 63 137 29 113 80    111                                 Sheridan Arpt None   1.04 0.66 3.43 4.60 2.24 1.11 0.38 0.43 1.89 0.34 1.54  1.11   18.77   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     186  122 350 288 99 52 32 60 132 24 217  198    133                                 Kaycee None   0.32 0.54 0.83 5.09 2.34 0.70 0.12 0.37 0.62 1.34 0.76  0.38   13.41   1981-2010 Normals   0.30 0.34 0.74 1.46 2.37 1.84 1.42 0.80 1.18 1.04 0.57 0.31    12.37   Percent of Normal     107 159 112 349 95 38 8 46 53 129 133  123    108 Snowfall    6.1 10.3 8.0 3.0 0.5 0.0 0.0 0.0 0.0 1.0 7.5  9.3   45.7 1981-2010 Normals   5.9 6.3 8.0 4.7 0.6 0.1 0.0 0.0 0.2 1.5 4.2 6.0   37.5   Percent of Normal     103  163 100 64 83 0 0 0 0 67 179  155   122                                 Climate Division 6 - Belle Fourche Drainage V Climate Division: Belle Fourche (Division Averages)   Jan 2017 Feb 2017 Mar 2017 Apr 2017 May 2017 Jun 2017 Jul 2017 Aug 2017 Sep 2017 Oct 2017 Nov 2017 Dec 2017   Total for 2017   Average Temperature   17.3 29.8 40.0 42.7 51.9 63.2 74.0 65.9 56.7 43.9 35.0 22.9   45.3   20th Century Average   19.0 23.1 30.6 41.4 51.3 60.9 68.8 67.0 56.4 45.0 31.0 22.1   43.1   Departure from Avegage   -1.7 6.7 9.4 1.3 0.6 2.3 5.2 -1.1 0.3 -1.1 4.0 0.8   2.2   Rank: Warm to Cold (123 yrs)   82 13 6 45 52 32 7 82 61 81 27 70   17   Rank: Cold to Warm (123 yrs)   41 111 118 79 72 92 117 42 60 43 97 54   107   Precipitation   0.70 0.39 0.68 3.08 1.69 2.19 1.89 1.37 2.12 0.88 0.67 0.72   16.38   20th Century Average   0.59 0.59 0.98 1.75 2.66 2.83 1.84 1.33 1.32 1.14 0.69 0.64    16.36   Percent of Average    119 66 69 176 64 77 103 103 161 77 97 113   100   Rank: Dry to Wet (123 yrs)   90 34 36 116 32 48 47 73 108 69 73 78   66   Rank: Wet to Dry (123 yrs)   33 90 88 8 92 76 77 51 21 55 51 46   58      Station Name:   Jan 2017 Feb 2017 Mar 2017 Apr 2017 May 2017 Jun 2017 Jul 2017 Aug 2017 Sep 2017 Oct 2017 Nov 2017 Dec 2017   Total for 2017  click on location   D0 D1                                for graph D2 D3 D4                               Gillette Airport None   0.54 0.30 0.79 4.31 1.25 1.90 0.64 0.42 1.58 1.12 0.49  0.71   14.05 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     138 77 82 293 51 86 39 44 133 88 89  178   101                                 Climate Division 7 - Cheyenne and Niobrara Drainages Climate Division: Cheyenne and Niobrara (Division Averages)   Jan 2017 Feb 2017 Mar 2017 Apr 2017 May 2017 Jun 2017 Jul 2017 Aug 2017 Sep 2017 Oct 2017 Nov 2017 Dec 2017   Total for 2017   Average Temperature   18.8 30.6 40.8 43.8 52.3 64.2 73.9 66.8 58.6 44.5 36.7 23.8   46.2   20th Century Average   20.3 24.6 32.1 42.5 52.4 62.5 70.3 68.4 57.6 45.9 31.8 23.0   44.3   Departure from Avegage   -1.5 6.0 8.7 1.3 -0.1 1.7 3.6 -1.6 1.0 -1.4 4.9 0.8   1.9   Rank: Warm to Cold (123 yrs)   81 18 5 47 58 41 14 90 52 86 18 66   19   Rank: Cold to Warm (123 yrs)   42 106 119 77 66 83 110 34 72 38 106 58   105   Precipitation   0.53 1.03 0.79 2.70 2.11 1.50 1.82 1.17 1.35 0.78 0.54 0.53   14.85   20th Century Average   0.42 0.46 0.76 1.68 2.53 2.34 1.78 1.21 1.14 0.95 0.55 0.48   14.30   Percent of Average    126 224 104 161 83 64 102 97 118 82 98 110   104   Rank: Dry to Wet (123 yrs)   89 119 71 108 51 37 47 63 82 53 70 84   74   Rank: Wet to Dry (123 yrs)   34 5 53 16 73 87 77 61 42 71 54 40   50      Climate Division 8 - Lower Platte Drainage zzzz Climate Division: Lower Platte (Division Averages)   Jan 2017 Feb 2017 Mar 2017 Apr 2017 May 2017 Jun 2017 Jul 2017 Aug 2017 Sep 2017 Oct 2017 Nov 2017 Dec 2017   Total for 2017   Average Temperature   22,9 32.3 41.7 43.2 51.0 62.8 71.6 65.6 57.8 43.9 39.4 27.8   46.7   20th Century Average   22.8 25.9 32.1 41.2 50.8 60.7 68.0 66.2 56.4 45.2 32.3 24.7   43.9   Departure from Avegage   0.1 6.4 9.6 2.0 0.2 2.1 3.6 -0.6 1.4 -1.3 7.1 3.1   2.8   Rank: Warm to Cold (123 yrs)   69 9 3 38 60 34 12 76 46 88 4 29   6   Rank: Cold to Warm (123 yrs)    54 115 121 86 64 90 112 48 78 36 120 95   118   Precipitation   0.85 1.09 1.37 2.39 3.00 0.70 1.06 1.23 1.37 0.85 0.53 0.52   14.98   20th Century Average   0.51 0.59 0.97 1.90 2.55 2.05 1.58 1.17 1.21 1.05 0.68 0.63   14.89   Percent of Average   167 185 141 126 118 34 67 105 113 81 78 83   101   Rank: Dry to Wet (123 yrs)   107 114 99 91 88 10 25 73 85 49 48 52   69   Rank: Wet to Dry (123 yrs)   16 10 25 33 36 114 99 51 39 75 76 72   55      Station Name:   Jan 2017 Feb 2017 Mar 2017 Apr 2017 May 2017 Jun 2017 Jul 2017 Aug 2017 Sep 2017 Oct 2017 Nov 2017 Dec 2017   Total for 2017  click on location   D0 D1                                for graph D2 D3 D4                               Casper Airport   None   0.54 0.81 1.79 2.21 2.25 1.01 0.37 0.94 1.42 1.08 0.31  1.37   14.10 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     106 142 218 171 111 63 26 111 131 97 41   280    113 Snowfall   13.8  14.3 6.4 5.8 2.9 0.0 0.0 0.0 T 5.6 3.6   19.4   71.8 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     152 146 59 50 100 0 0 0 0 76 35   176    96                                 Cheyenne Arpt D0   0.77 0.61 0.73 2.57 3.89 0.67 0.53 2.11 1.08 1.13 0.44   0.56   15.09   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     233 130 70 144 2.34 29 24 108 73 122 75  114    95 Snowfall    13.1 8.3 0.1 8.7 14.7 0.0 T T T 8.0 4.2   8.9   66.0 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     222 105 1 85 639 0 0 0 0 160 53   106   109                                 Climate Division 9 - Wind River Drainage Climate Division: Wind River (Division Averages)   Jan 2017 Feb 2017 Mar 2017 Apr 2017 May 2017 Jun 2017 Jul 2017 Aug 2017 Sep 2017 Oct 2017 Nov 2017 Dec 2017   Total for 2017   Average Temperature   13.9 25.5 37.8 39.1 48.6 58.7 67.7 62.9 52.8 40.2 33.4 23.4   42.0   20th Century Average   17.3 22.0 29.0 38.3 48.0 57.0 64.7 62.8 52.9 41.8 27.9 19.5   40.1   Departure from Avegage   -3.4 3.5 8.8 0.8 0.6 1.7 3.0 0.1 -0.1 -1.6 5.5 3.9   1.9   Rank: Warm to Cold (123 yrs)    101 31 4 51 57 38 14 64 74 88 13 26   16   Rank: Cold to Warm (123 yrs)   22 93 120 73 67 86 110 62 50 36 111 98   108   Precipitation   1.84 2.46 3.16 3.31 1.82 1.00 0.55 0.96 2.74 0.92 1.65 1.30   21.71   20th Century Average   0.93 0.81 1.26 1.89 2.25 1.67 1.04 0.88 1.19 1.20 0.96 0.84   14.92   Percent of Average    198 304 251 175 81 60 53 109 230 77 172 155   146   Rank: Dry to Wet (123 yrs)   113 120 121 115 47 44 33 81 115 49 110 103   123   Rank: Wet to Dry (123 yrs)   10 4 3 9 77 80 91 43 9 75 14 21   1      v Station Name:   Jan 2017 Feb 2017 Mar 2017 Apr 2017 May 2017 Jun 2017 Jul 2017 Aug 2017 Sep 2017 Oct 2017 Nov 2017 Dec 2017   Total for 2017  click on location   D0 D1                                for graph D2 D3 D4                               Lander Airport None   1.27 1.11 4.65 3.26 2.20 0.26 0.43 1.14e 1.84e 1.07 0.45  1.23   18.91e   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     310 191 401 174 100 20 55 187 175 83 52   212    149 Snowfall    18.3 19.6 5.7 17.4 6.8 0.0 0.0 0.0 0.0 4.5 3.5   18.4   94.2 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     241 190 35 104 142 0 0 0 0 46 27  182   103                                 Riverton Airport  None   1.01 0.85 3.71 3.19 1.40 0.20 0.15 0.94 1.73 0.61 0.54   0.64   14.97   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     421 315 675 245 81 16 17 165 192 69 108   200   159 Snowfall    16.4 14.3 T 14.5 4.2 0.0 0.0 0.0 T 2.7 4.6 11.6   68.3                                 Dubois  None   0.84 2.06 1.84 1.02 1.13 1.59 1.09 1.32 4.10 0.95 1.70   0.74   18.38   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     350 542 460 93 69 124 98 153 331 117 298   264     185 Snowfall    19.5 39.0 8.2 7.0 2.5 0.0 0.0 0.0 1.5 13.0 17.1   10.7   118.5 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     500 684 137 82 64 0 0 0 58 433 295   210   263                                 Riverton  None   1.12 0.96 2.45 4.70 1.34 0.49 0.37 1.09 1.71 0.53 0.44   0.66   15.86   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     400 291 438 480 92 40 47 218 206 62 107   275     188 Snowfall    16.8 15.1 T 20.9 2.2 T 0.0 T 0.0 1.3 3.6  11.2   71.1 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     350 252 0 343 183 0 0 0 0 35 84   233   192 Climate Division 10 - Upper Platte Drainage Climate Division: Upper Platte (Division Averages)   Jan 2017 Feb 2017 Mar 2017 Apr 2017 May 2017 Jun 2017 Jul 2017 Aug 2017 Sep 2017 Oct 2017 Nov 2017 Dec 2017   Total for 2017   Average Temperature   17.6 27.6 38.0 39.0 47.9 59.8 67.6 62.8 53.5 40.0 36.0 25.2   42.9   20th Century Average   18.3 21.7 28.0 37.5 47.4 57.1 64.5 62.6 52.9 41.8 28.3 20.2   40.0   Departure from Avegage   -0.7 5.9 10.0 1.5 0.5 2.7 3.1 0.2 0.6 -1.8 7.7 5.0   2.9   Rank: Warm to Cold (123 yrs)   81 14 2 47 63 25 13 59 56 93 5 10   6   Rank: Cold to Warm (123 yrs)   42 110 122 77 62 99 111 65 68 31 119 114   118   Precipitation   1.60 1.37 1.07 1.73 1.76 0.35 1.02 0.88 1.60 0.68 0.84 0.74   13.64   20th Century Average   0.80 0.83 1.06 1.58 1.78 1.27 1.10 0.93 1.08 1,09 0.83 0.82   13.19   Percent of Average    200 165 101 109 99 28 93 94 148 62 101 90   103   Rank: Dry to Wet (123 yrs)   119 116 52 45 56 12 62 63 103 36 65 57   77   Rank: Wet to Dry (123 yrs)   4 8 72 79 68 112 62 61 21 88 59 67   47      Station Name:   Jan 2017 Feb 2017 Mar 2017 Apr 2017 May 2017 Jun 2017 Jul 2017 Aug 2017 Sep 2017 Oct 2017 Nov 2017 Dec 2017   Total for 2017  click on location   D0 D1                                for graph D2 D3 D4                               Jeffrey City  None   0.84 1.51 0.98 1.80 1.37 0.22 0.73 0.35 1.58 0.22 0.26   0.62   10.51   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    271 368 114 142 74 19 82 58 198 24 24   148   104 Snowfall   14.0 18.0 1.0 14.0 11.0 0.0 0.0 0.0 T 4.0 1.0   8.0   71.0 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    304 269 11 137 224 0 0 0 0 55 15   145    125