Climatological Report (Daily)
Issued by NWS
Issued by NWS
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CDUS45 KRIW 100727
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
127 AM MDT THU SEP 10 2026
...................................
...THE CASPER WY CLIMATE SUMMARY FOR SEPTEMBER 9 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 84 3:23 PM 95 2021 79 5 82
MINIMUM 36 5:03 AM 24 2020 45 -9 44
AVERAGE 60 62 -2
PRECIPITATION (IN)
YESTERDAY 0.00 0.46 1940 0.02 -0.02 T
MONTH TO DATE 0.01 0.21 -0.20 0.01
SINCE SEP 1 0.01 0.21 -0.20 0.01
SINCE JAN 1 6.35 9.04 -2.69 7.32
SNOWFALL (IN)
YESTERDAY 0.0 0.0 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 5 5 0 2
MONTH TO DATE 8 33 -25 32
SINCE SEP 1 8 33 -25 32
SINCE JUL 1 13 78 -65 42
COOLING
YESTERDAY 0 2 -2 0
MONTH TO DATE 37 19 18 7
SINCE SEP 1 37 19 18 7
SINCE JAN 1 630 431 199 457
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION NW (310)
HIGHEST GUST SPEED 28 HIGHEST GUST DIRECTION W (290)
AVERAGE WIND SPEED 8.0
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 85 5:00 AM
LOWEST 7 4:00 PM
AVERAGE 46
..........................................................
THE CASPER WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 79 95 2021
MINIMUM TEMPERATURE (F) 44 27 2020
SUNRISE AND SUNSET
SEPTEMBER 10 2026.....SUNRISE 6:40 AM MDT SUNSET 7:24 PM MDT
SEPTEMBER 11 2026.....SUNRISE 6:41 AM MDT SUNSET 7:23 PM MDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$