Climatological Report (Daily)
Issued by NWS
Issued by NWS
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CDUS45 KRIW 110813
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
213 AM MDT FRI SEP 11 2026
...................................
...THE CASPER WY CLIMATE SUMMARY FOR SEPTEMBER 10 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 87 4:08 PM 95 2021 79 8 90
MINIMUM 44 3:28 AM 27 2020 44 0 43
AVERAGE 66 62 4
PRECIPITATION (IN)
YESTERDAY 0.00 0.40 1986 0.03 -0.03 0.00
MONTH TO DATE 0.01 0.24 -0.23 0.01
SINCE SEP 1 0.01 0.24 -0.23 0.01
SINCE JAN 1 6.35 9.07 -2.72 7.32
SNOWFALL (IN)
YESTERDAY 0.0 0.0 2020 0.1 -0.1 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 8 38 -30 32
SINCE SEP 1 8 38 -30 32
SINCE JUL 1 13 83 -70 42
COOLING
YESTERDAY 1 1 0 2
MONTH TO DATE 38 20 18 9
SINCE SEP 1 38 20 18 9
SINCE JAN 1 631 432 199 459
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 25 HIGHEST WIND DIRECTION SW (210)
HIGHEST GUST SPEED 32 HIGHEST GUST DIRECTION SW (210)
AVERAGE WIND SPEED 13.2
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 45 12:00 AM
LOWEST 8 4:00 PM
AVERAGE 27
..........................................................
THE CASPER WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 78 91 1993
MINIMUM TEMPERATURE (F) 44 26 2014
SUNRISE AND SUNSET
SEPTEMBER 11 2026.....SUNRISE 6:41 AM MDT SUNSET 7:23 PM MDT
SEPTEMBER 12 2026.....SUNRISE 6:42 AM MDT SUNSET 7:21 PM MDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$