697
CDUS45 KRIW 270045
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
645 PM MDT SAT SEP 26 2026
...............................
..THE CASPER WY CLIMATE SUMMARY FOR SEPTEMBER 26 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 83 3:14 PM 91 2015 70 13 79
MINIMUM 51 2:21 AM 21 1972 38 13 46
AVERAGE 67 54 13 63
PRECIPITATION (IN)
TODAY 0.00 0.29 2013 0.05 -0.05 0.00
MONTH TO DATE 0.69 0.79 -0.10 2.49
SINCE SEP 1 0.69 0.79 -0.10 2.49
SINCE JAN 1 7.03 9.62 -2.59 9.80
SNOWFALL (IN)
TODAY MM 0.1 MM 0.0
MONTH TO DATE 0.0 1.1 -1.1 0.0
SINCE SEP 1 0.0 1.1 -1.1 0.0
SINCE JUL 1 0.0 1.1 -1.1 0.0
SNOW DEPTH MM
DEGREE DAYS
HEATING
TODAY 0 11 -11 2
MONTH TO DATE 72 164 -92 104
SINCE SEP 1 72 164 -92 104
SINCE JUL 1 77 209 -132 114
COOLING
TODAY 2 0 2 0
MONTH TO DATE 45 29 16 17
SINCE SEP 1 45 29 16 17
SINCE JAN 1 638 441 197 467
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 26 HIGHEST WIND DIRECTION SW (240)
HIGHEST GUST SPEED 35 HIGHEST GUST DIRECTION SW (230)
AVERAGE WIND SPEED 11.3
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 55
LOWEST 14
AVERAGE 35
......................................................
THE CASPER WY CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 70 89 2015
MINIMUM TEMPERATURE (F) 38 22 1945
1964
SUNRISE AND SUNSET
SEPTEMBER 26 2026.....SUNRISE 6:58 AM MDT SUNSET 6:56 PM MDT
SEPTEMBER 27 2026.....SUNRISE 6:59 AM MDT SUNSET 6:54 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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