264
CDUS45 KRIW 240045
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
645 PM MDT WED SEP 23 2026
...............................
..THE CASPER WY CLIMATE SUMMARY FOR SEPTEMBER 23 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 75 2:54 PM 90 1992 72 3 63
MINIMUM 52 6:21 AM 24 2000 40 12 46
AVERAGE 64 56 8 55
PRECIPITATION (IN)
TODAY T 0.38 2025 0.04 -0.04 0.38
MONTH TO DATE 0.69 0.66 0.03 2.49
SINCE SEP 1 0.69 0.66 0.03 2.49
SINCE JAN 1 7.03 9.49 -2.46 9.80
SNOWFALL (IN)
TODAY MM 0.0 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 1 10 -9 10
MONTH TO DATE 58 133 -75 93
SINCE SEP 1 58 133 -75 93
SINCE JUL 1 63 178 -115 103
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 35 HIGHEST GUST DIRECTION SW (240)
AVERAGE WIND SPEED 14.3
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 74
LOWEST 26
AVERAGE 50
......................................................
THE CASPER WY CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 71 87 1966
2020
MINIMUM TEMPERATURE (F) 39 22 1984
SUNRISE AND SUNSET
SEPTEMBER 23 2026.....SUNRISE 6:54 AM MDT SUNSET 7:01 PM MDT
SEPTEMBER 24 2026.....SUNRISE 6:56 AM MDT SUNSET 6:59 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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