314
CDUS45 KRIW 230045
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
645 PM MDT TUE SEP 22 2026
...............................
..THE CASPER WY CLIMATE SUMMARY FOR SEPTEMBER 22 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 82 2:57 PM 87 1966 72 10 64
1992
2007
MINIMUM 42 5:50 AM 25 2000 40 2 47
AVERAGE 62 56 6 56
PRECIPITATION (IN)
TODAY 0.00 0.60 1976 0.03 -0.03 T
MONTH TO DATE 0.69 0.62 0.07 2.11
SINCE SEP 1 0.69 0.62 0.07 2.11
SINCE JAN 1 7.03 9.45 -2.42 9.42
SNOWFALL (IN)
TODAY MM 0.1 MM 0.0
MONTH TO DATE 0.0 0.8 -0.8 0.0
SINCE SEP 1 0.0 0.8 -0.8 0.0
SINCE JUL 1 0.0 0.8 -0.8 0.0
SNOW DEPTH MM
DEGREE DAYS
HEATING
TODAY 3 9 -6 9
MONTH TO DATE 57 123 -66 83
SINCE SEP 1 57 123 -66 83
SINCE JUL 1 62 168 -106 93
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 26 HIGHEST WIND DIRECTION SW (240)
HIGHEST GUST SPEED 37 HIGHEST GUST DIRECTION SW (240)
AVERAGE WIND SPEED 7.0
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 100
LOWEST 20
AVERAGE 60
......................................................
THE CASPER WY CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 72 90 1992
MINIMUM TEMPERATURE (F) 40 24 2000
SUNRISE AND SUNSET
SEPTEMBER 22 2026.....SUNRISE 6:53 AM MDT SUNSET 7:03 PM MDT
SEPTEMBER 23 2026.....SUNRISE 6:54 AM MDT SUNSET 7:01 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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