918
CDUS45 KRIW 120731
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1231 AM MST FRI DEC 12 2025
...............................
..THE CASPER WY CLIMATE SUMMARY FOR DECEMBER 11 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 1:40 PM 59 1939 35 25 38
MINIMUM 25 11:20 PM -19 1985 15 10 25
AVERAGE 43 25 18
PRECIPITATION (IN)
YESTERDAY 0.00 0.15 1984 0.02 -0.02 0.00
MONTH TO DATE 0.11 0.22 -0.11 0.01
SINCE DEC 1 0.11 0.22 -0.11 0.01
SINCE JAN 1 11.80 11.83 -0.03 9.13
SNOWFALL (IN)
YESTERDAY 0.0 2.6 1984 0.4 -0.4 0.0
MONTH TO DATE 1.0 3.9 -2.9 T
SINCE DEC 1 1.0 3.9 -2.9 T
SINCE JUL 1 5.3 21.3 -16.0 T
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 22 40 -18 33
MONTH TO DATE 344 428 -84 345
SINCE DEC 1 344 428 -84 345
SINCE JUL 1 1770 2230 -460 1845
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 38 HIGHEST WIND DIRECTION SW (220)
HIGHEST GUST SPEED 49 HIGHEST GUST DIRECTION SW (220)
AVERAGE WIND SPEED 19.6
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 96 11:00 PM
LOWEST 25 2:00 PM
AVERAGE 61
......................................................
THE CASPER WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 35 60 2014
MINIMUM TEMPERATURE (F) 15 -14 2000
SUNRISE AND SUNSET
DECEMBER 12 2025......SUNRISE 7:28 AM MST SUNSET 4:32 PM MST
DECEMBER 13 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.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page