494
CDUS45 KRIW 130730
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1230 AM MST SAT DEC 13 2025
...............................
..THE CASPER WY CLIMATE SUMMARY FOR DECEMBER 12 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 45 11:59 PM 60 2014 35 10 44
MINIMUM 23 6:40 PM -14 2000 15 8 18
AVERAGE 34 25 9
PRECIPITATION (IN)
YESTERDAY 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)
YESTERDAY 0.0 3.2 1992 0.3 -0.3 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 0
DEGREE DAYS
HEATING
YESTERDAY 31 40 -9 34
MONTH TO DATE 375 468 -93 379
SINCE DEC 1 375 468 -93 379
SINCE JUL 1 1801 2270 -469 1879
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 23 HIGHEST WIND DIRECTION SW (230)
HIGHEST GUST SPEED 32 HIGHEST GUST DIRECTION SW (230)
AVERAGE WIND SPEED 7.4
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.6
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 96 5:00 AM
LOWEST 53 11:00 PM
AVERAGE 75
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THE CASPER WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 34 57 2014
MINIMUM TEMPERATURE (F) 15 -16 1967
SUNRISE AND SUNSET
DECEMBER 13 2025......SUNRISE 7:29 AM MST SUNSET 4:32 PM MST
DECEMBER 14 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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