146
CDUS45 KRIW 250727
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
127 AM MDT THU SEP 25 2025
...............................
..THE CASPER WY CLIMATE SUMMARY FOR SEPTEMBER 24 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 73 3:16 PM 87 1966 71 2 79
2020
MINIMUM 44 4:39 AM 22 1984 39 5 46
AVERAGE 59 55 4
PRECIPITATION (IN)
YESTERDAY 0.00 0.62 1986 0.04 -0.04 0.00
MONTH TO DATE 2.49 0.70 1.79 0.24
SINCE SEP 1 2.49 0.70 1.79 0.24
SINCE JAN 1 9.80 9.53 0.27 7.22
SNOWFALL (IN)
YESTERDAY 0.0 2.9 1984 0.1 -0.1 0.0
MONTH TO DATE 0.0 0.9 -0.9 0.0
SINCE SEP 1 0.0 0.9 -0.9 0.0
SINCE JUL 1 0.0 0.9 -0.9 0.0
SNOW DEPTH MM
DEGREE DAYS
HEATING
YESTERDAY 6 10 -4 2
MONTH TO DATE 99 143 -44 85
SINCE SEP 1 99 143 -44 85
SINCE JUL 1 109 188 -79 123
COOLING
YESTERDAY 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
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WIND (MPH)
HIGHEST WIND SPEED 22 HIGHEST WIND DIRECTION SW (210)
HIGHEST GUST SPEED 29 HIGHEST GUST DIRECTION SW (210)
AVERAGE WIND SPEED 11.6
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 1:00 AM
LOWEST 32 2:00 PM
AVERAGE 63
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THE CASPER WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 71 90 2014
MINIMUM TEMPERATURE (F) 39 20 1984
SUNRISE AND SUNSET
SEPTEMBER 25 2025.....SUNRISE 6:57 AM MDT SUNSET 6:57 PM MDT
SEPTEMBER 26 2025.....SUNRISE 6:58 AM MDT SUNSET 6:55 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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