Climatological Report (Daily)
Issued by NWS
Issued by NWS
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CDUS45 KRIW 010730
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
130 AM MDT TUE SEP 01 2026
...................................
...THE CASPER WY CLIMATE SUMMARY FOR AUGUST 31 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 85 3:57 PM 94 1954 83 2 82
2007
MINIMUM 51 5:39 AM 33 1965 47 4 49
1977
2020
AVERAGE 68 65 3
PRECIPITATION (IN)
YESTERDAY 0.00 0.14 1972 0.02 -0.02 0.00
MONTH TO DATE 2.01 0.79 1.22 0.72
SINCE JUN 1 2.69 3.32 -0.63 2.39
SINCE JAN 1 6.34 8.83 -2.49 7.31
SNOWFALL (IN)
YESTERDAY 0.0 0.0 2020 0.0 0.0 0.0
MONTH TO DATE 0.0 0.0 0.0 0.0
SINCE JUN 1 0.0 0.1 -0.1 0.0
SINCE JUL 1 0.0 0.0 0.0 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 0 3 -3 0
MONTH TO DATE 5 28 -23 5
SINCE JUN 1 97 168 -71 101
SINCE JUL 1 5 42 -37 10
COOLING
YESTERDAY 3 3 0 1
MONTH TO DATE 215 157 58 148
SINCE JUN 1 592 408 184 450
SINCE JAN 1 593 412 181 450
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 22 HIGHEST WIND DIRECTION W (260)
HIGHEST GUST SPEED 40 HIGHEST GUST DIRECTION W (250)
AVERAGE WIND SPEED 9.3
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 77 2:00 AM
LOWEST 11 4:00 PM
AVERAGE 44
..........................................................
THE CASPER WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 82 97 1995
MINIMUM TEMPERATURE (F) 47 32 1965
SUNRISE AND SUNSET
SEPTEMBER 1 2026.....SUNRISE 6:31 AM MDT SUNSET 7:40 PM MDT
SEPTEMBER 2 2026.....SUNRISE 6:32 AM MDT SUNSET 7:38 PM MDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$