161
CDUS45 KRIW 270728
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
128 AM MDT SUN SEP 27 2026
...............................
..THE CASPER WY CLIMATE SUMMARY FOR SEPTEMBER 26 2026
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)
YESTERDAY
MAXIMUM 83 3:14 PM 91 2015 70 13 79
MINIMUM 51 2:21 AM 21 1972 38 13 46
AVERAGE 67 54 13
PRECIPITATION (IN)
YESTERDAY 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)
YESTERDAY 0.0 T 2013 0.1 -0.1 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 0
DEGREE DAYS
HEATING
YESTERDAY 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
YESTERDAY 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
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WIND (MPH)
HIGHEST WIND SPEED 26 HIGHEST WIND DIRECTION SW (240)
HIGHEST GUST SPEED 35 HIGHEST GUST DIRECTION SW (230)
AVERAGE WIND SPEED 11.2
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 55 1:00 AM
LOWEST 14 4:00 PM
AVERAGE 35
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THE CASPER WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 70 89 2015
MINIMUM TEMPERATURE (F) 38 22 1945
1964
SUNRISE AND SUNSET
SEPTEMBER 27 2026.....SUNRISE 6:59 AM MDT SUNSET 6:54 PM MDT
SEPTEMBER 28 2026.....SUNRISE 7:00 AM MDT SUNSET 6:52 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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