908
CDUS45 KRIW 170045
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
645 PM MDT TUE SEP 16 2025
...............................
..THE CASPER WY CLIMATE SUMMARY FOR SEPTEMBER 16 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 68 2:00 PM 94 2000 76 -8 88
MINIMUM 46 4:01 AM 19 1965 42 4 41
AVERAGE 57 59 -2 65
PRECIPITATION (IN)
TODAY 0.01 0.56 2006 0.03 -0.02 T
MONTH TO DATE 0.06 0.42 -0.36 0.17
SINCE SEP 1 0.06 0.42 -0.36 0.17
SINCE JAN 1 7.37 9.25 -1.88 7.15
SNOWFALL (IN)
TODAY MM 0.1 MM 0.0
MONTH TO DATE 0.0 0.4 -0.4 0.0
SINCE SEP 1 0.0 0.4 -0.4 0.0
SINCE JUL 1 0.0 0.4 -0.4 0.0
SNOW DEPTH MM
DEGREE DAYS
HEATING
TODAY 8 7 1 0
MONTH TO DATE 49 74 -25 25
SINCE SEP 1 49 74 -25 25
SINCE JUL 1 59 119 -60 63
COOLING
TODAY 0 1 -1 0
MONTH TO DATE 15 26 -11 51
SINCE SEP 1 15 26 -11 51
SINCE JAN 1 465 438 27 526
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 26 HIGHEST WIND DIRECTION NE (60)
HIGHEST GUST SPEED 34 HIGHEST GUST DIRECTION NE (60)
AVERAGE WIND SPEED 7.7
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.5
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
THUNDERSTORM
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97
LOWEST 39
AVERAGE 68
......................................................
THE CASPER WY CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 75 89 2000
MINIMUM TEMPERATURE (F) 42 19 1965
SUNRISE AND SUNSET
SEPTEMBER 16 2025.....SUNRISE 6:47 AM MDT SUNSET 7:13 PM MDT
SEPTEMBER 17 2025.....SUNRISE 6:48 AM MDT SUNSET 7:11 PM MDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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