833
CDUS45 KRIW 170727
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1227 AM MST WED DEC 17 2025
...............................
..THE CASPER WY CLIMATE SUMMARY FOR DECEMBER 16 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 60R 2:30 PM 59 1980 34 26 44
MINIMUM 36 6:56 PM -31 1964 14 22 17
AVERAGE 48 24 24
PRECIPITATION (IN)
YESTERDAY T 0.36 2016 0.02 -0.02 0.00
MONTH TO DATE 0.11 0.32 -0.21 0.01
SINCE DEC 1 0.11 0.32 -0.21 0.01
SINCE JAN 1 11.80 11.93 -0.13 9.13
SNOWFALL (IN)
YESTERDAY MM 5.2 2016 0.4 MM 0.0
MONTH TO DATE 1.0 5.7 -4.7 T
SINCE DEC 1 1.0 5.7 -4.7 T
SINCE JUL 1 5.3 23.1 -17.8 T
SNOW DEPTH MM
DEGREE DAYS
HEATING
YESTERDAY 17 41 -24 34
MONTH TO DATE 455 631 -176 503
SINCE DEC 1 455 631 -176 503
SINCE JUL 1 1881 2433 -552 2003
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
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 35 HIGHEST WIND DIRECTION W (250)
HIGHEST GUST SPEED 46 HIGHEST GUST DIRECTION W (250)
AVERAGE WIND SPEED 17.5
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 53 11:00 PM
LOWEST 22 2:00 PM
AVERAGE 38
......................................................
THE CASPER WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 34 60 1980
MINIMUM TEMPERATURE (F) 14 -31 1964
SUNRISE AND SUNSET
DECEMBER 17 2025......SUNRISE 7:31 AM MST SUNSET 4:33 PM MST
DECEMBER 18 2025......SUNRISE 7:32 AM MST SUNSET 4:33 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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