


Climatological Report (Daily)
Issued by NWS
Issued by NWS
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914 CDUS45 KRIW 220727 CLIP60 CLIMATE REPORT NATIONAL WEATHER SERVICE RIVERTON WY 127 AM MDT THU MAY 22 2025 ................................... ...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR MAY 21 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 46 4:48 PM 68 2012 52 -6 45 MINIMUM 27 11:59 PM 17 2001 28 -1 28 AVERAGE 37 40 -3 37 PRECIPITATION (IN) YESTERDAY 0.06 0.72 2008 0.08 -0.02 0.01 MONTH TO DATE 2.32 1.47 0.85 1.09 SINCE MAR 1 5.40 5.65 -0.25 6.42 SINCE JAN 1 9.10 9.15 -0.05 10.89 DEGREE DAYS HEATING YESTERDAY 28 25 3 28 MONTH TO DATE 532 589 -57 516 SINCE MAR 1 1727 3035 -1308 2668 SINCE JUL 1 8647 11239 -2592 10142 COOLING YESTERDAY 0 0 0 0 MONTH TO DATE 0 0 0 0 SINCE MAR 1 0 0 0 0 SINCE JAN 1 0 0 0 0 ................................................................... WIND (MPH) HIGHEST WIND SPEED 9 HIGHEST WIND DIRECTION W (270) HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION SW (240) AVERAGE WIND SPEED 2.7 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 2:00 AM LOWEST 45 5:00 PM AVERAGE 71 .......................................................... THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 53 64 2001 2023 MINIMUM TEMPERATURE (F) 28 22 2022 SUNRISE AND SUNSET MAY 22 2025...........SUNRISE 5:47 AM MDT SUNSET 8:51 PM MDT MAY 23 2025...........SUNRISE 5:46 AM MDT SUNSET 8:52 PM MDT - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$