Climatological Report (Daily)
Issued by NWS
Issued by NWS
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CDUS45 KRIW 190045
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
645 PM MDT SAT OCT 18 2025
...................................
...THE CASPER WY CLIMATE SUMMARY FOR OCTOBER 18 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 48 3:59 PM 78 2003 59 -11 38
MINIMUM 32 8:57 AM 16 2006 30 2 28
AVERAGE 40 44 -4 33
PRECIPITATION (IN)
TODAY 0.14 0.35 1971 0.04 0.10 0.20
MONTH TO DATE 1.46 0.78 0.68 0.45
SINCE SEP 1 4.01 1.73 2.28 0.69
SINCE JAN 1 11.32 10.56 0.76 7.67
SNOWFALL (IN)
TODAY MM 0.3 MM T
MONTH TO DATE 0.0 3.7 -3.7 T
SINCE SEP 1 0.0 5.2 -5.2 T
SINCE JUL 1 0.0 5.2 -5.2 T
SNOW DEPTH MM
DEGREE DAYS
HEATING
TODAY 25 21 4 32
MONTH TO DATE 264 310 -46 198
SINCE SEP 1 377 524 -147 300
SINCE JUL 1 387 569 -182 338
COOLING
TODAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE SEP 1 17 30 -13 63
SINCE JAN 1 467 442 25 538
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION SW (220)
HIGHEST GUST SPEED 27 HIGHEST GUST DIRECTION W (260)
AVERAGE WIND SPEED 7.2
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.6
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
SNOW
LIGHT SNOW
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 100
LOWEST 42
AVERAGE 71
..........................................................
THE CASPER WY CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 58 79 2003
MINIMUM TEMPERATURE (F) 30 17 1949
SUNRISE AND SUNSET
OCTOBER 18 2025.......SUNRISE 7:23 AM MDT SUNSET 6:18 PM MDT
OCTOBER 19 2025.......SUNRISE 7:25 AM MDT SUNSET 6:16 PM MDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$