083
CDUS45 KRIW 190731
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1231 AM MST FRI DEC 19 2025
...............................
..THE CASPER WY CLIMATE SUMMARY FOR DECEMBER 18 2025
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)
YESTERDAY
MAXIMUM 39 11:49 PM 52 1994 34 5 46
MINIMUM 18 5:53 AM -18 1983 14 4 20
AVERAGE 29 24 5
PRECIPITATION (IN)
YESTERDAY 0.00 0.19 1961 0.01 -0.01 0.00
MONTH TO DATE 0.11 0.35 -0.24 0.01
SINCE DEC 1 0.11 0.35 -0.24 0.01
SINCE JAN 1 11.80 11.96 -0.16 9.13
SNOWFALL (IN)
YESTERDAY 0.0 4.0 2016 0.4 -0.4 0.0
MONTH TO DATE 1.0 6.4 -5.4 T
SINCE DEC 1 1.0 6.4 -5.4 T
SINCE JUL 1 5.3 23.8 -18.5 T
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 36 41 -5 32
MONTH TO DATE 514 713 -199 572
SINCE DEC 1 514 713 -199 572
SINCE JUL 1 1940 2515 -575 2072
COOLING
YESTERDAY 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
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WIND (MPH)
HIGHEST WIND SPEED 32 HIGHEST WIND DIRECTION SW (220)
HIGHEST GUST SPEED 46 HIGHEST GUST DIRECTION SW (220)
AVERAGE WIND SPEED 18.5
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT SNOW
RELATIVE HUMIDITY (PERCENT)
HIGHEST 53 6:00 AM
LOWEST 23 12:00 AM
AVERAGE 38
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THE CASPER WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 34 55 2023
MINIMUM TEMPERATURE (F) 14 -24 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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