091
CDUS45 KRIW 150045
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
645 PM MDT MON SEP 14 2026
...............................
..THE CASPER WY CLIMATE SUMMARY FOR SEPTEMBER 14 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 3:42 PM 92 1948 77 0 79
MINIMUM 55 6:42 AM 28 1961 43 12 48
AVERAGE 66 60 6 64
PRECIPITATION (IN)
TODAY T 0.52 1982 0.02 -0.02 0.00
MONTH TO DATE 0.36 0.35 0.01 0.01
SINCE SEP 1 0.36 0.35 0.01 0.01
SINCE JAN 1 6.70 9.18 -2.48 7.32
SNOWFALL (IN)
TODAY MM 0.0 MM 0.0
MONTH TO DATE 0.0 0.3 -0.3 0.0
SINCE SEP 1 0.0 0.3 -0.3 0.0
SINCE JUL 1 0.0 0.3 -0.3 0.0
SNOW DEPTH MM
DEGREE DAYS
HEATING
TODAY 0 6 -6 1
MONTH TO DATE 15 61 -46 40
SINCE SEP 1 15 61 -46 40
SINCE JUL 1 20 106 -86 50
COOLING
TODAY 1 1 0 0
MONTH TO DATE 42 24 18 15
SINCE SEP 1 42 24 18 15
SINCE JAN 1 635 436 199 465
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 32 HIGHEST WIND DIRECTION W (270)
HIGHEST GUST SPEED 59 HIGHEST GUST DIRECTION SW (240)
AVERAGE WIND SPEED 10.9
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.2
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 83
LOWEST 14
AVERAGE 49
......................................................
THE CASPER WY CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 76 92 2000
MINIMUM TEMPERATURE (F) 43 28 1947
1965
SUNRISE AND SUNSET
SEPTEMBER 14 2026.....SUNRISE 6:45 AM MDT SUNSET 7:17 PM MDT
SEPTEMBER 15 2026.....SUNRISE 6:46 AM MDT SUNSET 7:15 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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