994
CDUS45 KRIW 210045
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
545 PM MST SAT DEC 20 2025
...............................
..THE CASPER WY CLIMATE SUMMARY FOR DECEMBER 20 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 39 3:02 PM 56 1941 34 5 56
2024
MINIMUM 15 8:07 AM -36 1990 14 1 31
AVERAGE 27 24 3 44
PRECIPITATION (IN)
TODAY 0.10 0.15 1968 0.02 0.08 0.00
MONTH TO DATE 0.21 0.39 -0.18 0.01
SINCE DEC 1 0.21 0.39 -0.18 0.01
SINCE JAN 1 11.90 12.00 -0.10 9.13
SNOWFALL (IN)
TODAY MM 0.4 MM 0.0
MONTH TO DATE 1.0 7.1 -6.1 T
SINCE DEC 1 1.0 7.1 -6.1 T
SINCE JUL 1 5.3 24.5 -19.2 T
SNOW DEPTH MM
DEGREE DAYS
HEATING
TODAY 38 41 -3 21
MONTH TO DATE 572 795 -223 626
SINCE DEC 1 572 795 -223 626
SINCE JUL 1 1998 2597 -599 2126
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 20 HIGHEST WIND DIRECTION N (20)
HIGHEST GUST SPEED 26 HIGHEST GUST DIRECTION NE (30)
AVERAGE WIND SPEED 7.9
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.5
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
FOG
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 96
LOWEST 52
AVERAGE 74
......................................................
THE CASPER WY CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 34 57 2024
MINIMUM TEMPERATURE (F) 14 -41 1990
SUNRISE AND SUNSET
DECEMBER 20 2025......SUNRISE 7:33 AM MST SUNSET 4:34 PM MST
DECEMBER 21 2025......SUNRISE 7:34 AM MST SUNSET 4:35 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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