890
CDUS45 KRIW 100727
CLIP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1227 AM MST WED DEC 10 2025
...............................
..THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR DECEMBER 9 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 34 3:27 PM 39 2014 24 10 21
2020
MINIMUM 22 11:56 PM -28 2013 4 18 3
AVERAGE 28 14 14 12
PRECIPITATION (IN)
YESTERDAY 0.12 0.58 2003 0.07 0.05 0.01
MONTH TO DATE 0.83 0.65 0.18 0.07
SINCE DEC 1 0.83 0.65 0.18 0.07
SINCE JAN 1 18.57 21.39 -2.82 18.45
DEGREE DAYS
HEATING
YESTERDAY 37 51 -14 53
MONTH TO DATE 397 453 -56 409
SINCE DEC 1 397 453 -56 409
SINCE JUL 1 3355 3960 -605 3516
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE DEC 1 0 0 0 0
SINCE JAN 1 1 0 1 0
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION W (260)
HIGHEST GUST SPEED 32 HIGHEST GUST DIRECTION W (260)
AVERAGE WIND SPEED 6.9
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 92 9:00 AM
LOWEST 61 6:00 PM
AVERAGE 77
......................................................
THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 24 36 2004
2014
MINIMUM TEMPERATURE (F) 3 -24 2009
SUNRISE AND SUNSET
DECEMBER 10 2025......SUNRISE 7:48 AM MST SUNSET 4:42 PM MST
DECEMBER 11 2025......SUNRISE 7:48 AM MST SUNSET 4:42 PM MST
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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