CXUS55 KRIW 011337 CLMCPR CLIMATE REPORT NATIONAL WEATHER SERVICE RIVERTON WY 637 AM MST THU JAN 01 2026 ................................... ...THE CASPER WY CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2025... CLIMATE NORMAL PERIOD: 1991 TO 2020 CLIMATE RECORD PERIOD: 1939 TO 2025 WEATHER OBSERVED NORMAL DEPART LAST YEAR'S VALUE DATE(S) VALUE FROM VALUE NORMAL .............................................................. TEMPERATURE (F) RECORD HIGH 66 12/02/2021 LOW -42 12/22/2022 HIGHEST 63 12/23 12/24 LOWEST -10 12/28 AVG. MAXIMUM 48.1 34.7 13.4 AVG. MINIMUM 25.6 14.8 10.8 MEAN 36.9 24.8 12.1 DAYS MAX >= 90 0 DAYS MAX <= 32 3 DAYS MIN <= 32 24 DAYS MIN <= 0 1 PRECIPITATION (INCHES) RECORD MAXIMUM 3.71 1982 MINIMUM 0.03 1952 TOTALS 0.36 0.61 -0.25 0.16 DAILY AVG. 0.01 0.02 -0.01 DAYS >= .01 6 DAYS >= .10 2 DAYS >= .50 0 DAYS >= 1.00 0 GREATEST 24 HR. TOTAL 0.15 12/26 TO 12/27 STORM TOTAL 0.13 SNOWFALL (INCHES) TOTALS 5.5 11.0 -5.5 SINCE 7/1 9.8 28.4 -18.6 SNOWDEPTH AVG. 0 DAYS >= 1.0 4 DEGREE DAYS HEATING TOTAL 863 1248 -385 SINCE 7/1 2289 3048 -759 COOLING TOTAL 0 0 0 SINCE 1/1 467 443 24 .............................................................. WIND (MPH) AVERAGE WIND SPEED 17.1 RESULTANT WIND SPEED/DIRECTION 15/230 HIGHEST WIND SPEED/DIRECTION 58/250 DATE 12/19 HIGHEST GUST SPEED/DIRECTION 78/290 DATE 12/17 SKY COVER POSSIBLE SUNSHINE (PERCENT) MM AVERAGE SKY COVER 0.23 NUMBER OF DAYS FAIR 22 NUMBER OF DAYS PC 9 NUMBER OF DAYS CLOUDY 0 AVERAGE RH (PERCENT) 56 WEATHER CONDITIONS. NUMBER OF DAYS WITH THUNDERSTORM 1 MIXED PRECIP 0 HEAVY RAIN 0 RAIN 0 LIGHT RAIN 6 FREEZING RAIN 0 LT FREEZING RAIN 0 HAIL 0 HEAVY SNOW 0 SNOW 1 LIGHT SNOW 10 SLEET 0 FOG 8 FOG W/VIS <= 1/4 MILE 0 HAZE 3 - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$