Climatological Report (Daily)
Issued by NWS
Issued by NWS
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975
CDUS45 KRIW 220045
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
645 PM MDT MON JUL 21 2025
...................................
...THE CASPER WY CLIMATE SUMMARY FOR JULY 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 96 1:14 PM 100 1982 90 6 86
MINIMUM 51 4:58 AM 39 1949 54 -3 53
AVERAGE 74 72 2 70
PRECIPITATION (IN)
TODAY 0.00 1.33 1951 0.04 -0.04 0.00
MONTH TO DATE 0.45 0.82 -0.37 0.41
SINCE JUN 1 0.98 2.16 -1.18 1.21
SINCE JAN 1 5.90 7.67 -1.77 6.47
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 0 0 0
MONTH TO DATE 5 9 -4 16
SINCE JUN 1 96 135 -39 70
SINCE JUL 1 5 9 -4 16
COOLING
TODAY 9 7 2 5
MONTH TO DATE 152 123 29 119
SINCE JUN 1 227 174 53 222
SINCE JAN 1 227 178 49 225
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 30 HIGHEST WIND DIRECTION SW (210)
HIGHEST GUST SPEED 40 HIGHEST GUST DIRECTION SW (220)
AVERAGE WIND SPEED 9.1
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 89
LOWEST 11
AVERAGE 50
..........................................................
THE CASPER WY CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 90 103 2005
MINIMUM TEMPERATURE (F) 54 44 1978
SUNRISE AND SUNSET
JULY 21 2025..........SUNRISE 5:46 AM MDT SUNSET 8:38 PM MDT
JULY 22 2025..........SUNRISE 5:47 AM MDT SUNSET 8:37 PM MDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$