


Climatological Report (Daily)
Issued by NWS
Issued by NWS
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125 CDUS45 KRIW 080741 CLIP60 CLIMATE REPORT NATIONAL WEATHER SERVICE RIVERTON WY 141 AM MDT WED OCT 08 2025 ................................... ...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR OCTOBER 7 2025... CLIMATE NORMAL PERIOD: 1991 TO 2020 CLIMATE RECORD PERIOD: 1998 TO 2025 WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST VALUE (LST) VALUE VALUE FROM YEAR NORMAL ................................................................... TEMPERATURE (F) YESTERDAY MAXIMUM 52 4:30 PM 66 2020 50 2 64 MINIMUM 23 7:03 AM 11 2000 25 -2 26 AVERAGE 38 37 1 45 PRECIPITATION (IN) YESTERDAY 0.00 0.37 2006 0.05 -0.05 0.00 MONTH TO DATE 0.96 0.38 0.58 0.00 SINCE SEP 1 2.42 1.95 0.47 1.43 SINCE JAN 1 14.13 17.21 -3.08 16.62 DEGREE DAYS HEATING YESTERDAY 27 28 -1 20 MONTH TO DATE 173 185 -12 143 SINCE SEP 1 657 773 -116 622 SINCE JUL 1 1173 1415 -242 1199 COOLING YESTERDAY 0 0 0 0 MONTH TO DATE 0 0 0 0 SINCE SEP 1 0 0 0 0 SINCE JAN 1 1 0 1 0 ................................................................... WIND (MPH) HIGHEST WIND SPEED 7 HIGHEST WIND DIRECTION SE (130) HIGHEST GUST SPEED 13 HIGHEST GUST DIRECTION E (70) AVERAGE WIND SPEED 1.7 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 96 12:00 AM LOWEST 48 5:00 PM AVERAGE 72 .......................................................... THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 49 65 2020 2024 MINIMUM TEMPERATURE (F) 25 7 2009 SUNRISE AND SUNSET OCTOBER 8 2025.......SUNRISE 7:29 AM MDT SUNSET 6:49 PM MDT OCTOBER 9 2025.......SUNRISE 7:30 AM MDT SUNSET 6:47 PM MDT - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$