929
CDUS45 KRIW 120728
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
128 AM MDT FRI SEP 12 2025
...............................
..THE CASPER WY CLIMATE SUMMARY FOR SEPTEMBER 11 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 89 2:03 PM 91 1993 78 11 85
MINIMUM 53 11:56 PM 26 2014 44 9 56
AVERAGE 71 61 10
PRECIPITATION (IN)
YESTERDAY T 0.63 1973 0.03 -0.03 0.02
MONTH TO DATE 0.01 0.27 -0.26 0.17
SINCE SEP 1 0.01 0.27 -0.26 0.17
SINCE JAN 1 7.32 9.10 -1.78 7.15
SNOWFALL (IN)
YESTERDAY 0.0 3.0 1974 0.0 0.0 0.0
MONTH TO DATE 0.0 0.2 -0.2 0.0
SINCE SEP 1 0.0 0.2 -0.2 0.0
SINCE JUL 1 0.0 0.2 -0.2 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 0 5 -5 0
MONTH TO DATE 32 43 -11 7
SINCE SEP 1 32 43 -11 7
SINCE JUL 1 42 88 -46 45
COOLING
YESTERDAY 6 1 5 6
MONTH TO DATE 15 21 -6 51
SINCE SEP 1 15 21 -6 51
SINCE JAN 1 465 433 32 526
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WIND (MPH)
HIGHEST WIND SPEED 44 HIGHEST WIND DIRECTION SW (220)
HIGHEST GUST SPEED 67 HIGHEST GUST DIRECTION S (190)
AVERAGE WIND SPEED 13.0
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.2
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 67 11:00 PM
LOWEST 12 2:00 PM
AVERAGE 40
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THE CASPER WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 78 94 1990
MINIMUM TEMPERATURE (F) 44 25 2014
SUNRISE AND SUNSET
SEPTEMBER 12 2025.....SUNRISE 6:43 AM MDT SUNSET 7:20 PM MDT
SEPTEMBER 13 2025.....SUNRISE 6:44 AM MDT SUNSET 7:19 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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