955
CDUS45 KRIW 240728
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
128 AM MDT THU SEP 24 2026
...............................
..THE CASPER WY CLIMATE SUMMARY FOR SEPTEMBER 23 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 75 2:54 PM 90 1992 72 3 63
MINIMUM 46 11:05 PM 24 2000 40 6 46
AVERAGE 61 56 5
PRECIPITATION (IN)
YESTERDAY 0.00 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)
YESTERDAY MM 4.5 2000 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
YESTERDAY 4 10 -6 10
MONTH TO DATE 61 133 -72 93
SINCE SEP 1 61 133 -72 93
SINCE JUL 1 66 178 -112 103
COOLING
YESTERDAY 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
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WIND (MPH)
HIGHEST WIND SPEED 26 HIGHEST WIND DIRECTION SW (240)
HIGHEST GUST SPEED 35 HIGHEST GUST DIRECTION SW (240)
AVERAGE WIND SPEED 12.5
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 80 11:00 PM
LOWEST 26 5:00 PM
AVERAGE 53
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THE CASPER WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 71 87 1966
2020
MINIMUM TEMPERATURE (F) 39 22 1984
SUNRISE AND SUNSET
SEPTEMBER 24 2026.....SUNRISE 6:56 AM MDT SUNSET 6:59 PM MDT
SEPTEMBER 25 2026.....SUNRISE 6:57 AM MDT SUNSET 6:57 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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