Climatological Report (Daily)
Issued by NWS
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CDUS45 KRIW 220045
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
645 PM MDT FRI AUG 21 2026
...................................
...THE CASPER WY CLIMATE SUMMARY FOR AUGUST 21 2026...
VALID TODAY AS OF 0600 PM LOCAL TIME.
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)
TODAY
MAXIMUM 99R 2:12 PM 96 2024 86 13 86
MINIMUM 57 2:58 AM 38 2016 50 7 55
AVERAGE 78 68 10 71
PRECIPITATION (IN)
TODAY 0.00 0.28 1987 0.02 -0.02 T
MONTH TO DATE 1.88 0.58 1.30 0.23
SINCE JUN 1 2.56 3.11 -0.55 1.90
SINCE JAN 1 6.21 8.62 -2.41 6.82
SNOWFALL (IN)
TODAY MM 0.0 MM 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 MM
DEGREE DAYS
HEATING
TODAY 0 1 -1 0
MONTH TO DATE 5 9 -4 4
SINCE JUN 1 97 149 -52 100
SINCE JUL 1 5 23 -18 9
COOLING
TODAY 13 4 9 6
MONTH TO DATE 147 122 25 133
SINCE JUN 1 524 373 151 435
SINCE JAN 1 525 377 148 435
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION NW (330)
HIGHEST GUST SPEED 29 HIGHEST GUST DIRECTION NW (310)
AVERAGE WIND SPEED 9.8
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 67
LOWEST 12
AVERAGE 40
..........................................................
THE CASPER WY CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 85 97 2009
2010
MINIMUM TEMPERATURE (F) 50 36 1966
SUNRISE AND SUNSET
AUGUST 21 2026........SUNRISE 6:19 AM MDT SUNSET 7:58 PM MDT
AUGUST 22 2026........SUNRISE 6:20 AM MDT SUNSET 7:57 PM MDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$