601
CDUS45 KRIW 290045
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
645 PM MDT SUN SEP 28 2025
...............................
..THE CASPER WY CLIMATE SUMMARY FOR SEPTEMBER 28 2025
VALID TODAY AS OF 0600 PM LOCAL TIME.
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)
TODAY
MAXIMUM 80 2:56 PM 92 2010 69 11 89
MINIMUM 48 2:20 AM 15 1945 38 10 40
AVERAGE 64 53 11 65
PRECIPITATION (IN)
TODAY T 0.34 2019 0.04 -0.04 0.00
MONTH TO DATE 2.49 0.87 1.62 0.24
SINCE SEP 1 2.49 0.87 1.62 0.24
SINCE JAN 1 9.80 9.70 0.10 7.22
SNOWFALL (IN)
TODAY MM 0.1 MM 0.0
MONTH TO DATE 0.0 1.3 -1.3 0.0
SINCE SEP 1 0.0 1.3 -1.3 0.0
SINCE JUL 1 0.0 1.3 -1.3 0.0
SNOW DEPTH MM
DEGREE DAYS
HEATING
TODAY 1 12 -11 0
MONTH TO DATE 111 188 -77 86
SINCE SEP 1 111 188 -77 86
SINCE JUL 1 121 233 -112 124
COOLING
TODAY 0 0 0 0
MONTH TO DATE 17 29 -12 57
SINCE SEP 1 17 29 -12 57
SINCE JAN 1 467 441 26 532
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION S (200)
HIGHEST GUST SPEED 26 HIGHEST GUST DIRECTION S (200)
AVERAGE WIND SPEED 9.6
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.2
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
THUNDERSTORM
RELATIVE HUMIDITY (PERCENT)
HIGHEST 83
LOWEST 27
AVERAGE 55
......................................................
THE CASPER WY CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 68 91 2024
MINIMUM TEMPERATURE (F) 37 18 1984
SUNRISE AND SUNSET
SEPTEMBER 28 2025.....SUNRISE 7:00 AM MDT SUNSET 6:52 PM MDT
SEPTEMBER 29 2025.....SUNRISE 7:01 AM MDT SUNSET 6:50 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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