331
CDUS45 KRIW 140730
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1230 AM MST SUN DEC 14 2025
...............................
..THE CASPER WY CLIMATE SUMMARY FOR DECEMBER 13 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 5:55 AM 57 2014 34 11 46
MINIMUM 20 6:18 PM -16 1967 15 5 20
AVERAGE 33 24 9
PRECIPITATION (IN)
YESTERDAY 0.00 0.37 2022 0.02 -0.02 0.00
MONTH TO DATE 0.11 0.26 -0.15 0.01
SINCE DEC 1 0.11 0.26 -0.15 0.01
SINCE JAN 1 11.80 11.87 -0.07 9.13
SNOWFALL (IN)
YESTERDAY 0.0 9.2 2022 0.4 -0.4 0.0
MONTH TO DATE 1.0 4.6 -3.6 T
SINCE DEC 1 1.0 4.6 -3.6 T
SINCE JUL 1 5.3 22.0 -16.7 T
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 32 40 -8 32
MONTH TO DATE 407 508 -101 411
SINCE DEC 1 407 508 -101 411
SINCE JUL 1 1833 2310 -477 1911
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 26 HIGHEST WIND DIRECTION SW (230)
HIGHEST GUST SPEED 35 HIGHEST GUST DIRECTION SW (220)
AVERAGE WIND SPEED 9.4
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.6
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 88 8:00 PM
LOWEST 35 7:00 AM
AVERAGE 62
......................................................
THE CASPER WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 34 55 1998
MINIMUM TEMPERATURE (F) 14 -19 2008
SUNRISE AND SUNSET
DECEMBER 14 2025......SUNRISE 7:29 AM MST SUNSET 4:32 PM MST
DECEMBER 15 2025......SUNRISE 7:30 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