CDUS45 KRIW 210732 CLICPR CLIMATE REPORT NATIONAL WEATHER SERVICE RIVERTON WY 132 AM MDT MON SEP 21 2026 ................................... ...THE CASPER WY CLIMATE SUMMARY FOR SEPTEMBER 20 2026... CLIMATE NORMAL PERIOD: 1991 TO 2020 CLIMATE RECORD PERIOD: 1939 TO 2026 WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST VALUE (LST) VALUE VALUE FROM YEAR NORMAL ................................................................... TEMPERATURE (F) YESTERDAY MAXIMUM 62 12:42 PM 89 1956 74 -12 76 MINIMUM 47 8:18 AM 16 1983 41 6 46 AVERAGE 55 57 -2 PRECIPITATION (IN) YESTERDAY 0.27 2.01 1989 0.04 0.23 0.00 MONTH TO DATE 0.69 0.55 0.14 2.11 SINCE SEP 1 0.69 0.55 0.14 2.11 SINCE JAN 1 7.03 9.38 -2.35 9.42 SNOWFALL (IN) YESTERDAY MM 6.9 1995 0.1 MM 0.0 MONTH TO DATE 0.0 0.6 -0.6 0.0 SINCE SEP 1 0.0 0.6 -0.6 0.0 SINCE JUL 1 0.0 0.6 -0.6 0.0 SNOW DEPTH MM DEGREE DAYS HEATING YESTERDAY 10 8 2 4 MONTH TO DATE 46 105 -59 74 SINCE SEP 1 46 105 -59 74 SINCE JUL 1 51 150 -99 84 COOLING YESTERDAY 0 0 0 0 MONTH TO DATE 43 29 14 15 SINCE SEP 1 43 29 14 15 SINCE JAN 1 636 441 195 465 ................................................................... WIND (MPH) HIGHEST WIND SPEED 23 HIGHEST WIND DIRECTION W (290) HIGHEST GUST SPEED 32 HIGHEST GUST DIRECTION W (280) AVERAGE WIND SPEED 9.4 SKY COVER POSSIBLE SUNSHINE MM AVERAGE SKY COVER 1.0 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED YESTERDAY. LIGHT RAIN FOG RELATIVE HUMIDITY (PERCENT) HIGHEST 97 2:00 AM LOWEST 62 1:00 PM AVERAGE 80 .......................................................... THE CASPER WY CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 73 85 1966 MINIMUM TEMPERATURE (F) 40 21 1983 SUNRISE AND SUNSET SEPTEMBER 21 2026.....SUNRISE 6:52 AM MDT SUNSET 7:05 PM MDT SEPTEMBER 22 2026.....SUNRISE 6:53 AM MDT SUNSET 7:03 PM MDT - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$