891
CDUS45 KRIW 290731
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
131 AM MDT TUE SEP 29 2026
...............................
..THE CASPER WY CLIMATE SUMMARY FOR SEPTEMBER 28 2026
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)
YESTERDAY
MAXIMUM 66 2:03 PM 92 2010 69 -3 80
MINIMUM 44 11:45 PM 15 1945 38 6 48
AVERAGE 55 53 2
PRECIPITATION (IN)
YESTERDAY 0.07 0.34 2019 0.04 0.03 0.06
MONTH TO DATE 0.76 0.87 -0.11 2.55
SINCE SEP 1 0.76 0.87 -0.11 2.55
SINCE JAN 1 7.10 9.70 -2.60 9.86
SNOWFALL (IN)
YESTERDAY 0.0 1.7 1985 0.1 -0.1 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 0
DEGREE DAYS
HEATING
YESTERDAY 10 12 -2 1
MONTH TO DATE 92 188 -96 111
SINCE SEP 1 92 188 -96 111
SINCE JUL 1 97 233 -136 121
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 45 29 16 17
SINCE SEP 1 45 29 16 17
SINCE JAN 1 638 441 197 467
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WIND (MPH)
HIGHEST WIND SPEED 24 HIGHEST WIND DIRECTION SW (220)
HIGHEST GUST SPEED 31 HIGHEST GUST DIRECTION SW (210)
AVERAGE WIND SPEED 9.5
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.6
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
THUNDERSTORM
RAIN
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 10:00 PM
LOWEST 54 12:00 AM
AVERAGE 76
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THE CASPER WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 68 91 2024
MINIMUM TEMPERATURE (F) 37 18 1984
SUNRISE AND SUNSET
SEPTEMBER 29 2026.....SUNRISE 7:01 AM MDT SUNSET 6:50 PM MDT
SEPTEMBER 30 2026.....SUNRISE 7:02 AM MDT SUNSET 6:49 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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