889
CDUS45 KRIW 260734
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
134 AM MDT FRI SEP 26 2025
...............................
..THE CASPER WY CLIMATE SUMMARY FOR SEPTEMBER 25 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 78 3:32 PM 90 2014 71 7 88
MINIMUM 45 6:09 AM 20 1984 39 6 42
AVERAGE 62 55 7
PRECIPITATION (IN)
YESTERDAY 0.00 0.21 1967 0.04 -0.04 0.00
MONTH TO DATE 2.49 0.74 1.75 0.24
SINCE SEP 1 2.49 0.74 1.75 0.24
SINCE JAN 1 9.80 9.57 0.23 7.22
SNOWFALL (IN)
YESTERDAY 0.0 1.5 1996 0.1 -0.1 0.0
MONTH TO DATE 0.0 1.0 -1.0 0.0
SINCE SEP 1 0.0 1.0 -1.0 0.0
SINCE JUL 1 0.0 1.0 -1.0 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 3 10 -7 0
MONTH TO DATE 102 153 -51 85
SINCE SEP 1 102 153 -51 85
SINCE JUL 1 112 198 -86 123
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 21 HIGHEST WIND DIRECTION SW (210)
HIGHEST GUST SPEED 26 HIGHEST GUST DIRECTION S (200)
AVERAGE WIND SPEED 10.5
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 76 6:00 AM
LOWEST 21 3:00 PM
AVERAGE 49
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THE CASPER WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 70 91 2015
MINIMUM TEMPERATURE (F) 38 21 1972
SUNRISE AND SUNSET
SEPTEMBER 26 2025.....SUNRISE 6:58 AM MDT SUNSET 6:55 PM MDT
SEPTEMBER 27 2025.....SUNRISE 6:59 AM MDT SUNSET 6:53 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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