290
CDUS45 KRIW 200045
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
545 PM MST FRI DEC 19 2025
...............................
..THE CASPER WY CLIMATE SUMMARY FOR DECEMBER 19 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 59R 12:36 PM 55 2023 34 25 46
MINIMUM 38 12:44 AM -24 1990 14 24 17
AVERAGE 49 24 25 32
PRECIPITATION (IN)
TODAY T 0.50 2013 0.02 -0.02 0.00
MONTH TO DATE 0.11 0.37 -0.26 0.01
SINCE DEC 1 0.11 0.37 -0.26 0.01
SINCE JAN 1 11.80 11.98 -0.18 9.13
SNOWFALL (IN)
TODAY MM 0.3 MM 0.0
MONTH TO DATE 1.0 6.7 -5.7 T
SINCE DEC 1 1.0 6.7 -5.7 T
SINCE JUL 1 5.3 24.1 -18.8 T
SNOW DEPTH MM
DEGREE DAYS
HEATING
TODAY 16 41 -25 33
MONTH TO DATE 530 754 -224 605
SINCE DEC 1 530 754 -224 605
SINCE JUL 1 1956 2556 -600 2105
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 58 HIGHEST WIND DIRECTION W (250)
HIGHEST GUST SPEED 76 HIGHEST GUST DIRECTION W (250)
AVERAGE WIND SPEED 29.2
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 57
LOWEST 25
AVERAGE 41
......................................................
THE CASPER WY CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 34 56 1941
2024
MINIMUM TEMPERATURE (F) 14 -36 1990
SUNRISE AND SUNSET
DECEMBER 19 2025......SUNRISE 7:33 AM MST SUNSET 4:34 PM MST
DECEMBER 20 2025......SUNRISE 7:33 AM MST SUNSET 4:34 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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