Climatological Report (Daily)
Issued by NWS
Issued by NWS
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CDUS45 KRIW 230045
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
645 PM MDT MON SEP 22 2025
...................................
...THE CASPER WY CLIMATE SUMMARY FOR SEPTEMBER 22 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 64 11:22 AM 87 1966 72 -8 76
1992
2007
MINIMUM 47 5:31 AM 25 2000 40 7 30
AVERAGE 56 56 0 53
PRECIPITATION (IN)
TODAY T 0.60 1976 0.03 -0.03 0.00
MONTH TO DATE 2.11 0.62 1.49 0.24
SINCE SEP 1 2.11 0.62 1.49 0.24
SINCE JAN 1 9.42 9.45 -0.03 7.22
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 9 9 0 12
MONTH TO DATE 83 123 -40 73
SINCE SEP 1 83 123 -40 73
SINCE JUL 1 93 168 -75 111
COOLING
TODAY 0 0 0 0
MONTH TO DATE 17 29 -12 51
SINCE SEP 1 17 29 -12 51
SINCE JAN 1 467 441 26 526
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 31 HIGHEST WIND DIRECTION N (10)
HIGHEST GUST SPEED 39 HIGHEST GUST DIRECTION N (20)
AVERAGE WIND SPEED 13.1
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.6
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 74
LOWEST 48
AVERAGE 61
..........................................................
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 2025.....SUNRISE 6:54 AM MDT SUNSET 7:02 PM MDT
SEPTEMBER 23 2025.....SUNRISE 6:55 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.
$$