915
CDUS45 KRIW 130045
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
545 PM MST FRI DEC 12 2025
...............................
..THE CASPER WY CLIMATE SUMMARY FOR DECEMBER 12 2025
VALID TODAY AS OF 0500 PM LOCAL TIME.
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1939 TO 2025
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...............................................................
TEMPERATURE (F)
TODAY
MAXIMUM 35 4:33 AM 60 2014 35 0 44
MINIMUM 25 4:59 PM -14 2000 15 10 18
AVERAGE 30 25 5 31
PRECIPITATION (IN)
TODAY 0.00 0.26 1940 0.02 -0.02 0.00
1992
MONTH TO DATE 0.11 0.24 -0.13 0.01
SINCE DEC 1 0.11 0.24 -0.13 0.01
SINCE JAN 1 11.80 11.85 -0.05 9.13
SNOWFALL (IN)
TODAY MM 0.3 MM 0.0
MONTH TO DATE 1.0 4.2 -3.2 T
SINCE DEC 1 1.0 4.2 -3.2 T
SINCE JUL 1 5.3 21.6 -16.3 T
SNOW DEPTH MM
DEGREE DAYS
HEATING
TODAY 35 40 -5 34
MONTH TO DATE 379 468 -89 379
SINCE DEC 1 379 468 -89 379
SINCE JUL 1 1805 2270 -465 1879
COOLING
TODAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE DEC 1 0 0 0 0
SINCE JAN 1 467 443 24 538
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 10 HIGHEST WIND DIRECTION N (20)
HIGHEST GUST SPEED 12 HIGHEST GUST DIRECTION NE (40)
AVERAGE WIND SPEED 4.8
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 96
LOWEST 75
AVERAGE 86
......................................................
THE CASPER WY CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 34 57 2014
MINIMUM TEMPERATURE (F) 15 -16 1967
SUNRISE AND SUNSET
DECEMBER 12 2025......SUNRISE 7:28 AM MST SUNSET 4:32 PM MST
DECEMBER 13 2025......SUNRISE 7:29 AM MST SUNSET 4:32 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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