Climatological Report (Daily)
Issued by NWS
Issued by NWS
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CDUS45 KRIW 280727
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
127 AM MDT MON SEP 28 2026
...................................
...THE CASPER WY CLIMATE SUMMARY FOR SEPTEMBER 27 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 71 4:18 PM 89 2015 70 1 81
MINIMUM 39 6:07 AM 22 1945 38 1 37
1964
AVERAGE 55 54 1
PRECIPITATION (IN)
YESTERDAY T 0.58 2013 0.04 -0.04 0.00
MONTH TO DATE 0.69 0.83 -0.14 2.49
SINCE SEP 1 0.69 0.83 -0.14 2.49
SINCE JAN 1 7.03 9.66 -2.63 9.80
SNOWFALL (IN)
YESTERDAY 0.0 4.8 2013 0.1 -0.1 0.0
MONTH TO DATE 0.0 1.2 -1.2 0.0
SINCE SEP 1 0.0 1.2 -1.2 0.0
SINCE JUL 1 0.0 1.2 -1.2 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 10 12 -2 6
MONTH TO DATE 82 176 -94 110
SINCE SEP 1 82 176 -94 110
SINCE JUL 1 87 221 -134 120
COOLING
YESTERDAY 0 0 0 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 30 HIGHEST WIND DIRECTION SW (230)
HIGHEST GUST SPEED 54 HIGHEST GUST DIRECTION SW (240)
AVERAGE WIND SPEED 7.8
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 83 5:00 AM
LOWEST 31 1:00 PM
AVERAGE 57
..........................................................
THE CASPER WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 69 92 2010
MINIMUM TEMPERATURE (F) 38 15 1945
SUNRISE AND SUNSET
SEPTEMBER 28 2026.....SUNRISE 7:00 AM MDT SUNSET 6:52 PM MDT
SEPTEMBER 29 2026.....SUNRISE 7:01 AM MDT SUNSET 6:50 PM MDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$