687
CDUS45 KRIW 080731
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
131 AM MDT TUE SEP 08 2026
...............................
..THE CASPER WY CLIMATE SUMMARY FOR SEPTEMBER 7 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 83 2:57 PM 96 2022 80 3 78
MINIMUM 52 11:57 PM 28 2010 45 7 39
AVERAGE 68 63 5
PRECIPITATION (IN)
YESTERDAY T 0.68 1946 0.03 -0.03 T
MONTH TO DATE 0.01 0.16 -0.15 0.01
SINCE SEP 1 0.01 0.16 -0.15 0.01
SINCE JAN 1 6.35 8.99 -2.64 7.32
SNOWFALL (IN)
YESTERDAY 0.0 2.3 2020 0.0 0.0 0.0
MONTH TO DATE 0.0 0.1 -0.1 0.0
SINCE SEP 1 0.0 0.1 -0.1 0.0
SINCE JUL 1 0.0 0.1 -0.1 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 0 4 -4 6
MONTH TO DATE 0 24 -24 30
SINCE SEP 1 0 24 -24 30
SINCE JUL 1 5 69 -64 40
COOLING
YESTERDAY 3 2 1 0
MONTH TO DATE 37 15 22 4
SINCE SEP 1 37 15 22 4
SINCE JAN 1 630 427 203 454
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 37 HIGHEST WIND DIRECTION W (250)
HIGHEST GUST SPEED 50 HIGHEST GUST DIRECTION SW (240)
AVERAGE WIND SPEED 19.7
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 50 6:00 AM
LOWEST 15 4:00 PM
AVERAGE 33
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THE CASPER WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 80 92 1994
1998
2005
MINIMUM TEMPERATURE (F) 45 29 1962
2020
SUNRISE AND SUNSET
SEPTEMBER 8 2026.....SUNRISE 6:38 AM MDT SUNSET 7:28 PM MDT
SEPTEMBER 9 2026.....SUNRISE 6:39 AM MDT SUNSET 7:26 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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