146 CDUS45 KRIW 250727 CLICPR CLIMATE REPORT NATIONAL WEATHER SERVICE RIVERTON WY 127 AM MDT THU SEP 25 2025 ................................... ...THE CASPER WY CLIMATE SUMMARY FOR SEPTEMBER 24 2025... CLIMATE NORMAL PERIOD: 1991 TO 2020 CLIMATE RECORD PERIOD: 1939 TO 2025 WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST VALUE (LST) VALUE VALUE FROM YEAR NORMAL ................................................................... TEMPERATURE (F) YESTERDAY MAXIMUM 73 3:16 PM 87 1966 71 2 79 2020 MINIMUM 44 4:39 AM 22 1984 39 5 46 AVERAGE 59 55 4 PRECIPITATION (IN) YESTERDAY 0.00 0.62 1986 0.04 -0.04 0.00 MONTH TO DATE 2.49 0.70 1.79 0.24 SINCE SEP 1 2.49 0.70 1.79 0.24 SINCE JAN 1 9.80 9.53 0.27 7.22 SNOWFALL (IN) YESTERDAY 0.0 2.9 1984 0.1 -0.1 0.0 MONTH TO DATE 0.0 0.9 -0.9 0.0 SINCE SEP 1 0.0 0.9 -0.9 0.0 SINCE JUL 1 0.0 0.9 -0.9 0.0 SNOW DEPTH MM DEGREE DAYS HEATING YESTERDAY 6 10 -4 2 MONTH TO DATE 99 143 -44 85 SINCE SEP 1 99 143 -44 85 SINCE JUL 1 109 188 -79 123 COOLING YESTERDAY 0 0 0 0 MONTH TO DATE 17 29 -12 51 SINCE SEP 1 17 29 -12 51 SINCE JAN 1 467 441 26 526 ................................................................... WIND (MPH) HIGHEST WIND SPEED 22 HIGHEST WIND DIRECTION SW (210) HIGHEST GUST SPEED 29 HIGHEST GUST DIRECTION SW (210) AVERAGE WIND SPEED 11.6 SKY COVER POSSIBLE SUNSHINE MM AVERAGE SKY COVER 0.0 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED YESTERDAY. NO SIGNIFICANT WEATHER WAS OBSERVED. RELATIVE HUMIDITY (PERCENT) HIGHEST 93 1:00 AM LOWEST 32 2:00 PM AVERAGE 63 .......................................................... THE CASPER WY CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 71 90 2014 MINIMUM TEMPERATURE (F) 39 20 1984 SUNRISE AND SUNSET SEPTEMBER 25 2025.....SUNRISE 6:57 AM MDT SUNSET 6:57 PM MDT SEPTEMBER 26 2025.....SUNRISE 6:58 AM MDT SUNSET 6:55 PM MDT - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$