073
CDUS45 KRIW 140729
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
129 AM MDT MON SEP 14 2026
...............................
..THE CASPER WY CLIMATE SUMMARY FOR SEPTEMBER 13 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 85 2:44 PM 89 1981 77 8 77
2006
MINIMUM 40 5:13 AM 23 1949 43 -3 46
AVERAGE 63 60 3
PRECIPITATION (IN)
YESTERDAY 0.35 0.95 1982 0.03 0.32 T
MONTH TO DATE 0.36 0.33 0.03 0.01
SINCE SEP 1 0.36 0.33 0.03 0.01
SINCE JAN 1 6.70 9.16 -2.46 7.32
SNOWFALL (IN)
YESTERDAY 0.0 0.4 1993 0.1 -0.1 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 0
DEGREE DAYS
HEATING
YESTERDAY 2 6 -4 3
MONTH TO DATE 15 55 -40 39
SINCE SEP 1 15 55 -40 39
SINCE JUL 1 20 100 -80 49
COOLING
YESTERDAY 0 1 -1 0
MONTH TO DATE 41 23 18 15
SINCE SEP 1 41 23 18 15
SINCE JAN 1 634 435 199 465
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WIND (MPH)
HIGHEST WIND SPEED 28 HIGHEST WIND DIRECTION SW (210)
HIGHEST GUST SPEED 37 HIGHEST GUST DIRECTION SW (210)
AVERAGE WIND SPEED 6.1
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
THUNDERSTORM
RAIN
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 87 10:00 PM
LOWEST 26 3:00 PM
AVERAGE 57
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THE CASPER WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 77 92 1948
MINIMUM TEMPERATURE (F) 43 28 1961
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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