Wyoming 2018 Climate Summary

...2018 Highlights for Wyoming...

• Annual: 23rd warmest year (above normal) on 124 years of record (1895-2018), 63rd wettest year on record with 101 percent of normal  or near normal precipitation.
• Monthly Temperatures: 8th warmest January and 7th warmest May on record.  6 months had above or much above normal monthly average temperatures, 4 months  were near normal, February and October were below normal.    
• Monthly Precipitation: 6th driest September on record.  4 months had above or much above normal statewide average precipitation, 2 months had below or much below normal statewide average precipitation, 6 months had near normal monthly average precipitation.
• Climate Divisions: Climate Division 2 - Snake River Basin, Climate Division 3 - Green and Bear River Basins and Climate Division 9 - Wind River Basin recorded their driest September on 124 years of record.

Wyoming: 2018 Precipitation - Percent of Normal Temperature - Departure from Normal Climate Division: Wyoming (Statewide Averages)   Jan 2018 Feb 2018 Mar 2018 Apr 2018 May 2018 Jun 2018 Jul 2018 Aug 2018 Sep 2018 Oct 2018 Nov 2018 Dec 2018   Total for 2018   Average Temperature   25.2 19.3 32.4 39.7 52.9 60.3 67.4 63.5 57.1 41.0 28.5 21.4   42.4   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   40.78   Departure from Average   6.8 -3.0 3.3 0.9 4.5 2.7 2.1 0.1 3.5 -1.5 -0.5 0.8   1.6   Rank: Warm to Cold (124 yrs)   8 96 32 52 7 27 26 66 14 92 76 57   23   Rank: Cold to Warm (124 yrs)   117 29 93 73 118 98 99 59 111 33 49 68   102   Precipitation   0.90 1.22 1.40 1.44 3.09 2.10 1.32 0.95 0.35 1.29 1.32 0.77   16.15   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   85 126 112 81 140 114 103 89 28 108 128 76   101   Rank: Dry to Wet (124 yrs)   47 100 83 47 104 84 82 60 6 73 91 34   64   Rank: Wet to Dry (124 yrs)   78 25 42 78 21 41 43 65 119 52 34 91   61      Maps and Statewide Averages for 3, 12 and 60 Months Wyoming Climate Divisions: 2018 Climate Division 1 - Yellowstone Drainage Climate Division: Yellowstone (Division Averages)   Jan 2018 Feb 2018 Mar 2018 Apr 2018 May 2018 Jun 2018 Jul 2018 Aug 2018 Sep 2018 Oct 2018 Nov 2018 Dec 2018   Total for 2018   Average Temperature   22.6 16.3 27.1 34.7 47.5 51.5 60.3 56.8 50.1 37.0 24.1 18.1   37.1   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 average   745 -2.6 2.8 1.4 5.1 1.2 2.4 0.6 2.7 -0.3 -0.5 1.2   1.8   Rank: Warm to Cold (124 yrs)   6 96 37 45 6 41 18 55 25 73 71 48   15   Rank: Cold to Warm (124 yrs)   119 29 88 80 119 84 107 70 100 52 54 77   110   Precipitation   2.92 3.91 2.52 4.06 3.14 4.00 0.53 1.72 0.36 1.97 3.07 1.76   29.96   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   101 173 97 164 111 156 33 114 20 105 123 67   109   Rank: Dry to Wet (124 yrs)   71 117 59 119 82 110 8 87 4 68 87 27   89   Rank: Wet to Dry (124 yrs)   54 8 66 6 43 15 117 38 121 57 38 98   36      Station Name:   Jan 2018 Feb 2018 Mar 2018 Apr 2018 May 2018 Jun 2018 Jul 2018 Aug 2018 Sep 2018 Oct 2018 Nov 2018 Dec 2018   Total for 2018  click on location   D0 D1                                for graph D2 D3 D4                               Old Faithful D0   2.44 3.53 2.58 2.54 1.93 3.99 0.58 1.39 0.19 2.11 1.49 1.05   23.82   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    116 177 117 115 69 162 37 95 13 127 65 33   94 Snowfall   40.5 57.5 27.5 12.0 0.0 0.0 0.0 0.0 0.0 7.1 23.0 22.0   189.6 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    108 185 103 62 0 0 0 0 0 92 73 50   91                                 Climate Division 2 - Snake Drainage Climate Division: Snake (Division Averages)   Jan 2018 Feb 2018 Mar 2018 Apr 2018 May 2018 Jun 2018 Jul 2018 Aug 2018 Sep 2018 Oct 2018 Nov 2018 Dec 2018   Total for 2018   Average Temperature   22.0 18.9 25.5 34.8 46.3 51.3 59.9 56.4 50.2 37.2 23.4 16.2   36.8   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 average   7.3 0.6 1.9 1.8 4.0 1.3 2.2 0.4 2.7 -0.2 -0.9 0.2   1.8   Rank: Warm to Cold (124 yrs)   3 58 46 40 7 40 18 56 18 67 76 60   12   Rank: Cold to Warm (124 yrs)   122 67 79 85 118 85 107 69 107 58 49 65   113   Precipitation   3.73 3.71 4.27 4.73 3.89 2.76 0.50 1.38 0.14 2.22 4.16 2.22   31.71   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   86 103 123 168 134 119 38 95 8 105 125 60   102   Rank: Dry to Wet (124 yrs)   55 79 33 121 103 88 13 69 1 68 86 27   73   Rank: Wet to Dry (124 yrs)   70 46 92 4 22 37 112 56 124 57 39 98   52     Station Name:   Jan 2018 Feb 2018 Mar 2018 Apr 2018 May 2018 Jun 2018 Jul 2018 Aug 2018 Sep 2018 Oct 2018 Nov 2018 Dec 2018   Total for 2018  click on location   D0 D1                                for graph D2 D3 D4                               Afton D0   1.42 1.29 2.29 2.29 2.61 1.57 0.68 0.61 0.01 1.93 1.84 1.31   17.86   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    101 118 164 149 115 80 48 49 1 118 124 105   98 Snowfall   16.2 11.8 23.1 7.2 T 0.0 0.0 0.0 0.0 T 13.5 19.0   90.8                                 Moose None   1.62 2.15 2.89 3.03 2.74 2.66 0.55 1.40 0.01 1.08 2.82 1.21   22.16   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    63 117 178 203 146 165 43 109 1 73 107 45   102 Snowfall   23.4 19.4 22.1 14.2 T 0.0 0.0 0.0 0.0 T 27.0 9.2    115.3 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    63 73 139 192 0 0 0 0 0 0 112 21   71                                 JHMR MId Mtn None                               Snowfall   65.0 63.0 66.0 63.0 7.0 0.0 0.0 0.0 0.0 9.0 52.0 62.0   389.0 1975-2018 Average   82.0 65.0 56.0 21.0 13.0 2.0 0.0 0.0 1.0 16.0 34.0 76.0    366.0   Percent of Normal     79 97 118 300 54 0 0 0 0 56 153 82   106                                 Climate Division 3 - Green and Bear Drainages Climate Division: Green and Bear (Division Averages)   Jan 2018 Feb 2018 Mar 2018 Apr 2018 May 2018 Jun 2018 Jul 2018 Aug 2018 Sep 2018 Oct 2018 Nov 2018 Dec 2018   Total for 2018   Average Temperature   24.9 21.8 31.0 39.3 50.8 58.7 66.3 62.1 56.1 39.9 26.7 16.8   41.2   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 average   8.7 2.1 4.0 2.3 4.2 3.4 3.5 1.3 4.5 -0.8 -0.3 -1.5   2.6   Rank: Warm to Cold (124 yrs)   5 45 26 34 9 19 8 35 4 84 70 81   7   Rank: Cold to Warm (124 yrs)   120 80 99 91 116 106 117 90 121 41 55 44   118   Precipitation   0.78 1.02 1.09 1.02 1.98 0.94 0.43 0.71 0.07 1.79 1.23 0.70   11.76   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   68 96 93 74 128 82 46 71 6 154 119 68   86   Rank: Dry to Wet (124 yrs)   41 71 66 39 94 66 14 45 1 105 81 32   32   Rank: Wet to Dry (124 yrs)   84 54 59 86 21 59 111 80 124 20 44 93   93      Station Name:   Jan 2018 Feb 2018 Mar 2018 Apr 2018 May 2018 Jun 2018 Jul 2018 Aug 2018 Sep 2018 Oct 2018 Nov 2018 Dec 2018   Total for 2018  click on location   D0 D1                                for graph D2 D3 D4                               Big Piney Airport  D0   0.05 T 0.27 0.37 1.84 1.66 0.22 0.49 T 0.59 0.08 0.10   5.67 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    16 0 61 70 219 210 31 71 0 111 38 33   88                                 Evanston Airport D1   0.17 0.41 0.06 T 0.33 1.04 0.52 0.83 0.02 2.18 0.64 0.36   6.56   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    31 67 7 0 19 84 58 86 2 186 62 62   54                                 Rock Springs Arpt.  D1   0.08 0.11 0.34 0.16 1.59 0.16 0.16 0.25 T 1.05 0.25 0.12   4.27  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    18 23 50 18 131 20 25 40 0 121 51 24    50                                 Bitter Creek 4NE D1   0.10 0.26 0.43 0.50 1.98 0.18 0.13 0.47 0.04 1.11 0.47 0.31   5.98   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    36 72 143 77 182 26 22 63 5 1.68 152 61   86                                 Fossil Butte N.M.   D1   0.60 0.88 0.92 1.48 1.66 0.56 0.48 0.11 T 1.96 1.24 0.42   10.31 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    122 129 112 151 118 54 56 12 0 177 144 57   94 Snowfall   7.3 11.9 7.0 4.6 T 0.0 0.0 0.0 0.0 4.0 19.7 7.6    62.6                                 Green River D1   0.68 0.53 1.12 1.15 2.54 0.45 0.25 0.36 0.00 1.90 1.10 0.85   10.93   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   200 123 158 135 207 46 45 53 0 235 268 193   131 Snowfall   6.8 6.9 6.7 0.8 0.0 0.0 0.0 0.0 0.0 5.5 10.6 8.5    45.8 1981-2010 Normals   64.6 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   148 95 134 21 0 0 0 0 0 1100 279 131    142                                 Rock Springs  D1   0.37 0.55 0.12 0.50 2.71 0.19 T 0.37 0.00 2.18 1.32 0.31   8.62   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    84 120 18 55 191 22 0 39 0 200 254 60   89 Snowfall   5.5 7.3 0.0 T 0.0 0.0 0.0 0.0 0.0 2.5 9.2 7.1    31.6                                 Climate Division 4 - Big Horn Drainage Climate Division: Big Horn (Division Averages)   Jan 2018 Feb 2018 Mar 2018 Apr 2018 May 2018 Jun 2018 Jul 2018 Aug 2018 Sep 2018 Oct 2018 Nov 2018 Dec 2018   Total for 2018   Average Temperature   24.8 16.7 33.2 40.1 53.6 60.2 67.9 63.9 56.0 41.7 29.3 22.1   42.5   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 average   7.1 -6.0 3.0 0.3 4.5 2.1 2.1 0.2 2.5 -0.9 0.1 1.5   1.4   Rank: Warm to Cold (124 yrs)   14 109 33 63 6 34 30 66 26 46 66 57   31   Rank: Cold to Warm (124 yrs)   111 16 92 62 119 91 95 59 99 79 59 68   94   Precipitation   0.63 1.42 1.02 1.75 3.49 2.18 0.61 1.02 0.34 0.86 1.32 0.68   15.32   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   15.02   Percent of Average   68 189 91 100 157 114 54 109 26 75 139 78   102   Rank: Dry to Wet (124 yrs)   37 117 59 74 110 86 30 87 13 46 98 54   70   Rank: Wet to Dry (124 yrs)   88 8 66 51 15 39 95 38 112 79 27 71   55      Station Name:   Jan 2018 Feb 2018 Mar 2018 Apr 2018 May 2018 Jun 2018 Jul 2018 Aug 2018 Sep 2018 Oct 2018 Nov 2018 Dec 2018   Total for 2018  click on location   D0 D1                                for graph D2 D3 D4                               Greybull Airport   None   0.01 0.26 0.33 0.87 1.94 1.20 0.16 0.74 0.25 0.08 0.35 0.12   6.31   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    4 144 83 151 118 100 24 176 28 13 117 43   84                                 Worland Airport D0   0.15 0.17 0.66 1.30 2.00 0.81 0.23 0.54 0.05 0.13 0.48 T   6.52   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    65 89 143 151 141 70 32 126 6 19 137 0   86                                 Cody  D0   0.37 0.51 0.27 1.35 4.06 2.21 0.58 1.35 0.26 0.80 0.84 0.25   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     66 155 48 127 223 132 52 148 25 90 175 76   122 Snowfall   2.0 8.0 1.3 6.6 0.0 0.0 0.0 0.0 0.0 2.0 9.5 3.6   33.0 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    26 119 19 105 0 0 0 0 0 47 151 45   70                                 Powell Field Station   D0   0.08 0.31 0.10 0.74 2.13 1.97 0.11 0.95 0.16 0.13 0.14 0.12   6.94   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    38 238 34 145 152 146 13 183 25 23 78 92   102 Snowfall   3.0 5.5 T 3.2 0.0 0.0 0.0 0.0 0.0 0.5 0.5 1.8   14.5 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    130 1100 0 640 0 0 0 0 0 42 38 150    144                                 Thermopolis   D0   0.39 0.27 0.64 1.16 3.19 2.11 0.50 0.42 0.06 0.43 1.22 0.48   10.87   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    111 60 74 79 172 140 57 72 5 34 153 104   93 Snowfall   4.5 6.0 1.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 13.0 9.5   34.0 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    80 130 40 0 0 0 0 0 0 0 351 211   127 Climate Division 5 - Powder and Tongue Drainages Climate Division: Powder and Tongue (Division Averages)   Jan 2018 Feb 2018 Mar 2018 Apr 2018 May 2018 Jun 2018 Jul 2018 Aug 2018 Sep 2018 Oct 2018 Nov 2018 Dec 2018   Total for 2018   Average Temperature   25.4 16.0 33.1 40.7 55.6 62.4 69.8 66.0 57.9 42.4 31.1 25.3   43.8   20th Century Average   19.6 23.8 31.1 41.2 50.8 60.2 68.2 66.5 55.9 44.6 31.0 22.3   42.9   Departure from average   5.8 -7.8 2.0 -0.5 4.8 2.2 1.6 -0.5 2.0 -2.2 0.1 3.0   0.9   Rank: Warm to Cold (124 yrs)   24 111 43 69 9 34 40 75 37 94 66 35   42   Rank: Cold to Warm (124 yrs)   101 14 82 56 116 91 85 50 88 31 59 90   83   Precipitation   0.56 1.07 1.39 1.21 2.80 2.70 1.51 1.08 0.76 1.26 0.79 0.80   15.93   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   89 175 132 65 110 115 10\8 109 59 109 103 123   104   Rank: Dry to Wet (124 yrs)   61 116 93 35 78 86 83 80 41 78 73 90   74   Rank: Wet to Dry (124 yrs)   64 9 32 90 47 39 42 45 84 47 52 35   51      Station Name:   Jan 2018 Feb 2018 Mar 2018 Apr 2018 May 2018 Jun 2018 Jul 2018 Aug 2018 Sep 2018 Oct 2018 Nov 2018 Dec 2018   Total for 2018  click on location   D0 D1                                for graph D2 D3 D4                               Buffalo Airport None   0.12 0.22  0.93  0.73 3.04 1.66 1.80 0.94 0.97 1.10 0.38 0.10   11.99 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    29 63  101  56 120 73 108 116 74 118 70 25    89                                 Sheridan Arpt None   0.63 1.53  1.50  1.83 3.57 1.43 1.21 1.30 1.21 1.69 0.83 0.32   17.05   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    113 283  153  114 152 67 103 181 85 120 117 57    120                                 Kaycee None   0.34 0.64  0.72 0.42 2.05 2.78 0.38 1.26 0.32 1.31 0.43 0.54   11.19   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    113 188  97 29 86 151 27 158 27 126 75 174   90 Snowfall   5.5 14.0  5.0 4.0 0.0 0.0 0.0 0.0 1.0 5.0 6.0 10.0   50.5 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    93 222  63 85 0 0 0 0 500 333 143 167   135                                 Climate Division 6 - Belle Fourche Drainage Climate Division: Belle Fourche (Division Averages)   Jan 2018 Feb 2018 Mar 2018 Apr 2018 May 2018 Jun 2018 Jul 2018 Aug 2018 Sep 2018 Oct 2018 Nov 2018 Dec 2018   Total for 2018   Average Temperature   23.5 13.3 31.9 39.2 56.3 63.4 69.3 65.5 58.0 41.6 30.3 25.1   43.2   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 average   4.5 -9.8 1.3 -2.2 5.0 2.5 0.5 -1.5 1.6 -3.4 -0.7 3.0   0.1   Rank: Warm to Cold (124 yrs)   36 117 54 94 9 31 59 88 49 104 72 40   66   Rank: Cold to Warm (124 yrs)   89 8 71 31 116 94 66 37 76 21 53 85   59   Precipitation   0.63 1.34 1.76 1.54 3.20 3.90 3.14 1.77 1.09 1.18 0.69 1.23   21.47   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   107 227 180 88 120 138 171 133 83 104 100 192   131   Rank: Dry to Wet (124 yrs)   89 122 115 59 83 100 114 93 62 43 75 117   112   Rank: Wet to Dry (124 yrs)   46 3 10 66 42 25 11 32 63 82 50 8   13      Station Name:   Jan 2018 Feb 2018 Mar 2018 Apr 2018 May 2018 Jun 2018 Jul 2018 Aug 2018 Sep 2018 Oct 2018 Nov 2018 Dec 2018   Total for 2018  click on location   D0 D1                                for graph D2 D3 D4                               Gillette Airport None   0.69 1.10 1.86 1.02 1.94 4.77 1.50 2.18 1.12 1.01 0.69 0.64   18.54 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    177 282 194 69 79 216 90 229 94 80 125 160   133                                 Climate Division 7 - Cheyenne and Niobrara Drainages Climate Division: Cheyenne and Niobrara (Division Averages)   Jan 2018 Feb 2018 Mar 2018 Apr 2018 May 2018 Jun 2018 Jul 2018 Aug 2018 Sep 2018 Oct 2018 Nov 2018 Dec 2018   Total for 2018   Average Temperature   23.4 17.3 35.0 41.1 56.9 64.7 70.1 66.7 60.9 42.7 30.9 25.5   44.6   20th Century Average   20.3 24.6 32.1 42.5 52.4 62.5 70.3 68.4 57.6 45.8 31.8 23.0   44.3   Departure from average   3.1 -7.3 2.9 -1.4 4.5 2.2 -0.2 -1.7 3.3 -3.1 -0.9 2.5   0.3   Rank: Warm to Cold (124 yrs)   44 110 37 83 8 34 69 93 21 100 77 40   72   Rank: Cold to Warm (124 yrs)   82 16 88 42 117 91 56 32 104 25 48 85   53   Precipitation   0.68 0.80 1.49 0.89 5.42 3.29 4.59 0.94 0.71 0.89 0.78 0.86   21.34   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   162 174 196 53 114 141 258 78 62 94 142 179   149   Rank: Dry to Wet (124 yrs)   105 109 119 22 119 101 124 48 47 64 96 116   122   Rank: Wet to Dry (124 yrs)   20 16 6 103 6 12 1 77 78 61 29 9   3      Climate Division 8 - Lower Platte Drainage Climate Division: Lower Platte (Division Averages)   Jan 2018 Feb 2018 Mar 2018 Apr 2018 May 2018 Jun 2018 Jul 2018 Aug 2018 Sep 2018 Oct 2018 Nov 2018 Dec 2018   Total for 2018   Average Temperature   28.6 23.2 36.5 41.9 55.4 64.1 69.3 65.8 60.9 43.0 31.7 26.2   45.6   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 Average   5.8 -2.7 4.4 0.7 4.6 3.4 1.3 -0.4 4.5 -2.2 -0.6 1.5   1.7   Rank: Warm to Cold (124 yrs)   14 89 25 59 5 21 43 71 8 98 79 52   21   Rank: Cold to Warm (124 yrs)   111 36 100 66 120 104 82 54 117 27 46 73   104   Precipitation   0.52 0.45 1.26 1.01 4.06 2.13 2.00 0.93 0.34 0.91 1.05 0.35   15.01   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   102 76 130 53 159 104 127 79 28 87 154 56   101   Rank: Dry to Wet (124 yrs)   70 40 94 24 108 80 92 51 10 54 108 28   69   Rank: Wet to Dry (124 yrs)   55 85 31 101 17 45 33 74 115 71 17 97   56      Station Name:   Jan 2018 Feb 2018 Mar 2018 Apr 2018 May 2018 Jun 2018 Jul 2018 Aug 2018 Sep 2018 Oct 2018 Nov 2018 Dec 2018   Total for 2018  click on location   D0 D1                                for graph D2 D3 D4                               Casper Airport   D0   0.68 0.62 1.00 1.03 2.86 1.63 1.62 0.33 0.28 1.69 0.94 0.40   13.08 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    133 109 122 80 142 101 115 39 26 152 124 82    104 Snowfall   12.3 18.6 6.5 5.7 T 0.0 0.0 0.0 0.0 7.1 11.3 6.9   68.4 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    135 190 60 49 0 0 0 0 0 96 110 63    91                                 Cheyenne Arpt None   0.57 0.34 1.01 0.94 4.10 1.55 2.43 2.71 0.09 0.69 0.94 0.28   15.65   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    173 72 96 53 175 66 111 139 6 74 159 57    98 Snowfall   7.4 5.3 6.6 7.1 T T T T 0.0 5.4 10.7 5.0   47.5 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    125 67 58 70 0 0 0 0 0 108 134 60   79                                 Climate Division 9 - Wind River Drainage Climate Division: Wind River (Division Averages)   Jan 2018 Feb 2018 Mar 2018 Apr 2018 May 2018 Jun 2018 Jul 2018 Aug 2018 Sep 2018 Oct 2018 Nov 2018 Dec 2018   Total for 2018   Average Temperature   24.3 18.6 32.1 39.5 51.4 58.9 66.8 63.2 56.4 40.3 27.0 19.5   41.5   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 average   7.0 -3.4 3.1 1.2 3.4 1.9 2.1 0.4 3.5 -1.5 -0.9 0.0   1.4   Rank: Warm to Cold (124 yrs)   13 94 33 47 15 37 27 56 15 88 80 68   26   Rank: Cold to Warm (124 yrs)   112 31 92 78 110 88 98 69 110 37 45 57   99   Precipitation   0.68 1.20 1.14 1.28 3.69 2.10 0.72 0.51 0.09 0.99 1.18 0.58   14.16   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   73 148 90 68 164 126 69 58 8 83 123 69   95   Rank: Dry to Wet (124 yrs)   43 108 60 41 108 90 51 37 1 55 86 30   49   Rank: Wet to Dry (124 yrs)   82 17 65 84 17 35 74 88 124 70 39 95   76      Station Name:   Jan 2018 Feb 2018 Mar 2018 Apr 2018 May 2018 Jun 2018 Jul 2018 Aug 2018 Sep 2018 Oct 2018 Nov 2018 Dec 2018   Total for 2018  click on location   D0 D1                                for graph D2 D3 D4                               Lander Airport None   0.68 0.94 1.09 1.49 4.07 1.66 0.67 0.21 0.05 1.10 0.88 0.58   13.42   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    166 162 94 80 185 131 86 34 5 85 102 100    106 Snowfall   11.5 9.3 8.1 2.7 T 0.0 0.0 0.0 0.0 6.8 11.7 6.8   56.9 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    151 90 50 16 0 0 0 0 0 69 89 67   62                                 Riverton Airport  D0   0.38 0.78 0.73 1.26 2.85 1.14 0.53 0.15 0.09 0.44 0.64 0.17   9.16   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    158 289 133 97 166 89 60 26 10 49 128 53   97 Snowfall   5.7 12.0 7.5 4.2 T T 0 0 0  3.8 9.3 3.0   45.5                                 Dubois  D0   0.22 0.52 0.56 1.26 3.20 2.88 0.65 0.74 0.10 0.81 0.80 0.25   11.99   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    92 137 140 115 195 225 59 86 8 100 140 89   121 Snowfall   3.2 7.6 5.6 8.5 2.0 0.0 0.0 0.0 0.0 1.8 15.5 5.7   49.9 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    82 133 93 100 51 0 0 0 0 60 267 112   111                                 Riverton  None   0.44 0.70 0.79 0.48 3.63 0.65 0.41 0.19 0.03 0.79 0.60 0.23   8.94   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    157 212 141 49 250 54 53 38 4 93 146 96     106 Snowfall   5.9 10.5 9.7 1.8 T T 0.0 T 0.0 6.5 9.0 4.2   47.6 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    123 175 164 30 0 0 0 0 0 176 209 88   128 Climate Division 10 - Upper Platte Drainage Climate Division: Upper Platte (Division Averages)   Jan 2018 Feb 2018 Mar 2018 Apr 2018 May 2018 Jun 2018 Jul 2018 Aug 2018 Sep 2018 Oct 2018 Nov 2018 Dec 2018   Total for 2018   Average Temperature   26.1 21.5 32.3 40.0 52.0 60.7 67.2 63.2 58.1 40.6 27.6 20.3   42.5   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 average   7.8 -0.2 4.3 2.5 4.6 3.6 2.7 0.6 5.2 -1.2 -0.7 0.1   2.4   Rank: Warm to Cold (124 yrs)   6 66 25 34 5 18 20 51 4 85 82 64   10   Rank: Cold to Warm (124 yrs)   119 59 100 91 120 107 105 74 121 40 43 61   115   Precipitation   0.67 0.78 0.90 0.83 1.76 1.22 0.89 0.75 0.22 1.25 1.17 0.48   10.92   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   84 94 86 53 99 96 81 79 20 115 141 59   83   Rank: Dry to Wet (124 yrs)   45 60 50 18 69 64 51 49 6 77 105 22   24   Rank: Wet to Dry (124 yrs)   80 65 75 107 56 61 74 76 119 48 20 103   101      Station Name:   Jan 2018 Feb 2018 Mar 2018 Apr 2018 May 2018 Jun 2018 Jul 2018 Aug 2018 Sep 2018 Oct 2018 Nov 2018 Dec 2018   Total for 2018  click on location   D0 D1                                for graph D2 D3 D4                               Jeffrey City  None   0.57 0.45 0.54 0.40 2.12 1.54 0.94 0.34 T 1.42 0.29 0.32   8.93   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    184 110 63 31 115 134 106 57 0 156 49 76   89 Snowfall   8.5 4.0 5.0 3.0 0.0 0.0 0.0 0.0 0.0 7.0 3.5 4.0   35.0 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    185 60 53 29 0 0 0 0 0 96 53 73    61 2017-18 Water Year 2018 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... 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