Climatological Report (Daily)
Issued by NWS
Issued by NWS
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CDUS45 KRIW 220045
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
645 PM MDT THU AUG 21 2025
...................................
...THE CASPER WY CLIMATE SUMMARY FOR AUGUST 21 2025...
VALID TODAY AS OF 0600 PM LOCAL TIME.
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1939 TO 2025
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...................................................................
TEMPERATURE (F)
TODAY
MAXIMUM 86 1:00 PM 96 2024 86 0 96
MINIMUM 55 4:43 AM 38 2016 50 5 60
AVERAGE 71 68 3 78
PRECIPITATION (IN)
TODAY T 0.28 1987 0.02 -0.02 T
MONTH TO DATE 0.23 0.58 -0.35 0.19
SINCE JUN 1 1.90 3.11 -1.21 1.52
SINCE JAN 1 6.82 8.62 -1.80 6.78
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 4 9 -5 6
SINCE JUN 1 100 149 -49 76
SINCE JUL 1 9 23 -14 22
COOLING
TODAY 6 4 2 13
MONTH TO DATE 133 122 11 149
SINCE JUN 1 435 373 62 437
SINCE JAN 1 435 377 58 440
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION NE (30)
HIGHEST GUST SPEED 25 HIGHEST GUST DIRECTION NE (30)
AVERAGE WIND SPEED 7.0
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 62
LOWEST 28
AVERAGE 45
..........................................................
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 2025........SUNRISE 6:19 AM MDT SUNSET 7:58 PM MDT
AUGUST 22 2025........SUNRISE 6:20 AM MDT SUNSET 7:56 PM MDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$