


Climatological Report (Daily)
Issued by NWS
Issued by NWS
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866 CDUS45 KRIW 190731 CLIRKS CLIMATE REPORT NATIONAL WEATHER SERVICE RIVERTON WY 131 AM MDT TUE AUG 19 2025 ................................... ...THE ROCK SPRINGS WY CLIMATE SUMMARY FOR AUGUST 18 2025... CLIMATE NORMAL PERIOD: 1991 TO 2020 CLIMATE RECORD PERIOD: 1948 TO 2025 WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST VALUE (LST) VALUE VALUE FROM YEAR NORMAL ................................................................... TEMPERATURE (F) YESTERDAY MAXIMUM 87 2:38 PM 94 2020 81 6 84 MINIMUM 50 5:54 AM 39 1978 53 -3 55 AVERAGE 69 67 2 PRECIPITATION (IN) YESTERDAY 0.00 0.51 1996 0.01 -0.01 0.06 MONTH TO DATE 0.03 0.32 -0.29 0.69 SINCE JUN 1 0.43 1.49 -1.06 1.20 SINCE JAN 1 2.74 5.00 -2.26 4.07 DEGREE DAYS HEATING YESTERDAY 0 1 -1 0 MONTH TO DATE 10 9 1 7 SINCE JUN 1 79 189 -110 69 SINCE JUL 1 10 30 -20 14 COOLING YESTERDAY 4 3 1 5 MONTH TO DATE 87 83 4 101 SINCE JUN 1 369 281 88 373 SINCE JAN 1 373 283 90 373 ................................................................... WIND (MPH) HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION W (280) HIGHEST GUST SPEED 31 HIGHEST GUST DIRECTION SW (240) AVERAGE WIND SPEED 4.6 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 63 5:00 AM LOWEST 12 3:00 PM AVERAGE 38 .......................................................... THE ROCK SPRINGS WY CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 81 90 1973 2013 2020 MINIMUM TEMPERATURE (F) 53 38 1978 SUNRISE AND SUNSET AUGUST 19 2025........SUNRISE 6:29 AM MDT SUNSET 8:09 PM MDT AUGUST 20 2025........SUNRISE 6:30 AM MDT SUNSET 8:08 PM MDT - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$