032
CDUS45 KRIW 220732
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
132 AM MDT MON SEP 22 2025
...............................
..THE CASPER WY CLIMATE SUMMARY FOR SEPTEMBER 21 2025
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)
YESTERDAY
MAXIMUM 80 3:24 PM 85 1966 73 7 63
MINIMUM 53 11:11 PM 21 1983 40 13 37
AVERAGE 67 57 10
PRECIPITATION (IN)
YESTERDAY T 1.09 1962 0.04 -0.04 0.00
MONTH TO DATE 2.11 0.59 1.52 0.24
SINCE SEP 1 2.11 0.59 1.52 0.24
SINCE JAN 1 9.42 9.42 0.00 7.22
SNOWFALL (IN)
YESTERDAY 0.0 4.9 1994 0.1 -0.1 0.0
MONTH TO DATE 0.0 0.7 -0.7 0.0
SINCE SEP 1 0.0 0.7 -0.7 0.0
SINCE JUL 1 0.0 0.7 -0.7 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 0 9 -9 15
MONTH TO DATE 74 114 -40 61
SINCE SEP 1 74 114 -40 61
SINCE JUL 1 84 159 -75 99
COOLING
YESTERDAY 2 0 2 0
MONTH TO DATE 17 29 -12 51
SINCE SEP 1 17 29 -12 51
SINCE JAN 1 467 441 26 526
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WIND (MPH)
HIGHEST WIND SPEED 24 HIGHEST WIND DIRECTION SW (210)
HIGHEST GUST SPEED 32 HIGHEST GUST DIRECTION W (260)
AVERAGE WIND SPEED 11.9
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
THUNDERSTORM
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 64 11:00 PM
LOWEST 23 4:00 PM
AVERAGE 44
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THE CASPER WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 72 87 1966
1992
2007
MINIMUM TEMPERATURE (F) 40 25 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.
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