225
CDUS45 KRIW 260045
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
645 PM MDT FRI SEP 25 2026
...............................
..THE CASPER WY CLIMATE SUMMARY FOR SEPTEMBER 25 2026
VALID TODAY AS OF 0600 PM LOCAL TIME.
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1939 TO 2026
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...............................................................
TEMPERATURE (F)
TODAY
MAXIMUM 76 3:20 PM 90 2014 71 5 78
MINIMUM 42 3:25 AM 20 1984 39 3 45
AVERAGE 59 55 4 62
PRECIPITATION (IN)
TODAY 0.00 0.21 1967 0.04 -0.04 0.00
MONTH TO DATE 0.69 0.74 -0.05 2.49
SINCE SEP 1 0.69 0.74 -0.05 2.49
SINCE JAN 1 7.03 9.57 -2.54 9.80
SNOWFALL (IN)
TODAY MM 0.1 MM 0.0
MONTH TO DATE 0.0 1.0 -1.0 0.0
SINCE SEP 1 0.0 1.0 -1.0 0.0
SINCE JUL 1 0.0 1.0 -1.0 0.0
SNOW DEPTH MM
DEGREE DAYS
HEATING
TODAY 6 10 -4 3
MONTH TO DATE 72 153 -81 102
SINCE SEP 1 72 153 -81 102
SINCE JUL 1 77 198 -121 112
COOLING
TODAY 0 0 0 0
MONTH TO DATE 43 29 14 17
SINCE SEP 1 43 29 14 17
SINCE JAN 1 636 441 195 467
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION SW (210)
HIGHEST GUST SPEED 24 HIGHEST GUST DIRECTION S (200)
AVERAGE WIND SPEED 5.6
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.2
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97
LOWEST 35
AVERAGE 66
......................................................
THE CASPER WY CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 70 91 2015
MINIMUM TEMPERATURE (F) 38 21 1972
SUNRISE AND SUNSET
SEPTEMBER 25 2026.....SUNRISE 6:57 AM MDT SUNSET 6:57 PM MDT
SEPTEMBER 26 2026.....SUNRISE 6:58 AM MDT SUNSET 6:56 PM MDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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