913
CDUS45 KRIW 120731
CLIP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1231 AM MST FRI DEC 12 2025
...............................
..THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR DECEMBER 11 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 37 2:12 PM 41 2014 23 14 18
MINIMUM 34 11:59 PM -17 2007 3 31 10
AVERAGE 36 13 23 14
PRECIPITATION (IN)
YESTERDAY 0.00 0.08 2015 0.07 -0.07 0.00
MONTH TO DATE 0.95 0.79 0.16 0.07
SINCE DEC 1 0.95 0.79 0.16 0.07
SINCE JAN 1 18.69 21.53 -2.84 18.45
DEGREE DAYS
HEATING
YESTERDAY 29 52 -23 51
MONTH TO DATE 462 557 -95 514
SINCE DEC 1 462 557 -95 514
SINCE JUL 1 3420 4064 -644 3621
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 13 HIGHEST WIND DIRECTION W (260)
HIGHEST GUST SPEED 28 HIGHEST GUST DIRECTION S (200)
AVERAGE WIND SPEED 5.3
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 85 2:00 AM
LOWEST 62 2:00 PM
AVERAGE 74
......................................................
THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 23 46 2014
MINIMUM TEMPERATURE (F) 3 -9 2020
SUNRISE AND SUNSET
DECEMBER 12 2025......SUNRISE 7:49 AM MST SUNSET 4:42 PM MST
DECEMBER 13 2025......SUNRISE 7:50 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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