Climatological Report (Daily)
Issued by NWS
Issued by NWS
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CDUS45 KRIW 260726
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
126 AM MDT SAT SEP 26 2026
...................................
...THE CASPER WY CLIMATE SUMMARY FOR SEPTEMBER 25 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 76 3:20 PM 90 2014 71 5 78
MINIMUM 42 3:25 AM 20 1984 39 3 45
AVERAGE 59 55 4
PRECIPITATION (IN)
YESTERDAY 0.00 0.21 1967 0.04 -0.04 0.00
MONTH TO DATE 0.69 0.74 -0.05 2.49
SINCE SEP 1 0.69 0.74 -0.05 2.49
SINCE JAN 1 7.03 9.57 -2.54 9.80
SNOWFALL (IN)
YESTERDAY 0.0 1.5 1996 0.1 -0.1 0.0
MONTH TO DATE 0.0 1.0 -1.0 0.0
SINCE SEP 1 0.0 1.0 -1.0 0.0
SINCE JUL 1 0.0 1.0 -1.0 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 6 10 -4 3
MONTH TO DATE 72 153 -81 102
SINCE SEP 1 72 153 -81 102
SINCE JUL 1 77 198 -121 112
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 43 29 14 17
SINCE SEP 1 43 29 14 17
SINCE JAN 1 636 441 195 467
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION SW (210)
HIGHEST GUST SPEED 25 HIGHEST GUST DIRECTION SW (210)
AVERAGE WIND SPEED 7.7
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.2
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 3:00 AM
LOWEST 35 5:00 PM
AVERAGE 66
..........................................................
THE CASPER WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 70 91 2015
MINIMUM TEMPERATURE (F) 38 21 1972
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.
$$