079
CDUS45 KRIW 190731
CLIP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1231 AM MST FRI DEC 19 2025
...............................
..THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR DECEMBER 18 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 23 11:59 PM 34 2013 23 0 31
MINIMUM 10 7:08 AM -23 2016 2 8 18
AVERAGE 17 12 5 25
PRECIPITATION (IN)
YESTERDAY 0.28 0.35 2015 0.08 0.20 0.05
MONTH TO DATE 1.59 1.32 0.27 0.58
SINCE DEC 1 1.59 1.32 0.27 0.58
SINCE JAN 1 19.33 22.06 -2.73 18.96
DEGREE DAYS
HEATING
YESTERDAY 48 53 -5 40
MONTH TO DATE 725 923 -198 825
SINCE DEC 1 725 923 -198 825
SINCE JUL 1 3683 4430 -747 3932
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
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WIND (MPH)
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION W (280)
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION W (270)
AVERAGE WIND SPEED 3.3
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 PM
LOWEST 64 12:00 AM
AVERAGE 78
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THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 23 39 2023
MINIMUM TEMPERATURE (F) 2 -20 2012
SUNRISE AND SUNSET
DECEMBER 19 2025......SUNRISE 7:54 AM MST SUNSET 4:44 PM MST
DECEMBER 20 2025......SUNRISE 7:55 AM MST SUNSET 4:44 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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