669
CDUS45 KRIW 010045
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
645 PM MDT WED SEP 30 2026
...............................
..THE CASPER WY CLIMATE SUMMARY FOR SEPTEMBER 30 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 77 3:45 PM 88 1980 68 9 77
MINIMUM 36 6:14 AM 17 1985 37 -1 50
AVERAGE 57 52 5 64
PRECIPITATION (IN)
TODAY 0.00 0.66 1982 0.04 -0.04 0.00
MONTH TO DATE 0.76 0.95 -0.19 2.55
SINCE SEP 1 0.76 0.95 -0.19 2.55
SINCE JAN 1 7.10 9.78 -2.68 9.86
SNOWFALL (IN)
TODAY MM 0.1 MM 0.0
MONTH TO DATE 0.0 1.5 -1.5 0.0
SINCE SEP 1 0.0 1.5 -1.5 0.0
SINCE JUL 1 0.0 1.5 -1.5 0.0
SNOW DEPTH MM
DEGREE DAYS
HEATING
TODAY 8 13 -5 1
MONTH TO DATE 108 213 -105 113
SINCE SEP 1 108 213 -105 113
SINCE JUL 1 113 258 -145 123
COOLING
TODAY 0 0 0 0
MONTH TO DATE 45 30 15 17
SINCE SEP 1 45 30 15 17
SINCE JAN 1 638 442 196 467
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION SW (220)
HIGHEST GUST SPEED 15 HIGHEST GUST DIRECTION NW (320)
AVERAGE WIND SPEED 5.4
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 85
LOWEST 20
AVERAGE 53
......................................................
THE CASPER WY CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 67 87 1992
MINIMUM TEMPERATURE (F) 36 20 1985
SUNRISE AND SUNSET
SEPTEMBER 30 2026.....SUNRISE 7:02 AM MDT SUNSET 6:49 PM MDT
OCTOBER 1 2026.......SUNRISE 7:03 AM MDT SUNSET 6:47 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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