862
CDUS45 KRIW 290728
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1228 AM MST MON DEC 29 2025
...............................
..THE CASPER WY CLIMATE SUMMARY FOR DECEMBER 28 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 19 2:49 PM 53 2005 34 -15 44
MINIMUM -10 6:49 AM -26 1983 14 -24 23
AVERAGE 5 24 -19
PRECIPITATION (IN)
YESTERDAY T 0.16 1955 0.02 -0.02 0.00
MONTH TO DATE 0.36 0.55 -0.19 0.02
SINCE DEC 1 0.36 0.55 -0.19 0.02
SINCE JAN 1 12.05 12.16 -0.11 9.14
SNOWFALL (IN)
YESTERDAY 1.5 2.4 1955 0.4 1.1 0.0
MONTH TO DATE 5.5 10.0 -4.5 T
SINCE DEC 1 5.5 10.0 -4.5 T
SINCE JUL 1 9.8 27.4 -17.6 T
SNOW DEPTH 3
DEGREE DAYS
HEATING
YESTERDAY 60 41 19 31
MONTH TO DATE 770 1123 -353 858
SINCE DEC 1 770 1123 -353 858
SINCE JUL 1 2196 2925 -729 2358
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 21 HIGHEST WIND DIRECTION W (260)
HIGHEST GUST SPEED 26 HIGHEST GUST DIRECTION W (250)
AVERAGE WIND SPEED 11.2
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.3
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT SNOW
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 91 1:00 AM
LOWEST 51 4:00 PM
AVERAGE 71
......................................................
THE CASPER WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 34 51 1965
1980
2024
MINIMUM TEMPERATURE (F) 14 -25 1990
SUNRISE AND SUNSET
DECEMBER 29 2025......SUNRISE 7:37 AM MST SUNSET 4:40 PM MST
DECEMBER 30 2025......SUNRISE 7:37 AM MST SUNSET 4:41 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