022
CDUS45 KRIW 160732
CLIP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1232 AM MST TUE DEC 16 2025
...............................
..THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR DECEMBER 15 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 42R 2:02 PM 35 2006 23 19 27
MINIMUM 8 6:35 AM -12 2007 2 6 13
AVERAGE 25 13 12 20
PRECIPITATION (IN)
YESTERDAY 0.00 0.97 2006 0.08 -0.08 0.09
MONTH TO DATE 0.96 1.09 -0.13 0.23
SINCE DEC 1 0.96 1.09 -0.13 0.23
SINCE JAN 1 18.70 21.83 -3.13 18.61
DEGREE DAYS
HEATING
YESTERDAY 40 52 -12 45
MONTH TO DATE 607 765 -158 693
SINCE DEC 1 607 765 -158 693
SINCE JUL 1 3565 4272 -707 3800
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 10 HIGHEST WIND DIRECTION W (270)
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION S (190)
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 91 4:00 AM
LOWEST 34 2:00 PM
AVERAGE 63
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THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 23 37 2018
MINIMUM TEMPERATURE (F) 2 -18 2016
SUNRISE AND SUNSET
DECEMBER 16 2025......SUNRISE 7:52 AM MST SUNSET 4:43 PM MST
DECEMBER 17 2025......SUNRISE 7:53 AM MST SUNSET 4:43 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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