Climatological Report (Daily)
Issued by NWS
Issued by NWS
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016
CDUS45 KRIW 160731
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
131 AM MDT TUE SEP 16 2025
...................................
...THE CASPER WY CLIMATE SUMMARY FOR SEPTEMBER 15 2025...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1939 TO 2025
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...................................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 80 2:08 PM 92 2000 76 4 86
MINIMUM 48 2:05 AM 28 1947 43 5 37
1965
AVERAGE 64 59 5
PRECIPITATION (IN)
YESTERDAY 0.04 0.47 2017 0.04 0.00 0.00
MONTH TO DATE 0.05 0.39 -0.34 0.17
SINCE SEP 1 0.05 0.39 -0.34 0.17
SINCE JAN 1 7.36 9.22 -1.86 7.15
SNOWFALL (IN)
YESTERDAY 0.0 0.7 1965 0.0 0.0 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 1 6 -5 3
MONTH TO DATE 41 67 -26 25
SINCE SEP 1 41 67 -26 25
SINCE JUL 1 51 112 -61 63
COOLING
YESTERDAY 0 1 -1 0
MONTH TO DATE 15 25 -10 51
SINCE SEP 1 15 25 -10 51
SINCE JAN 1 465 437 28 526
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 29 HIGHEST WIND DIRECTION W (290)
HIGHEST GUST SPEED 42 HIGHEST GUST DIRECTION W (290)
AVERAGE WIND SPEED 9.4
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.3
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
THUNDERSTORM
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 83 10:00 PM
LOWEST 21 2:00 PM
AVERAGE 52
..........................................................
THE CASPER WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 76 94 2000
MINIMUM TEMPERATURE (F) 42 19 1965
SUNRISE AND SUNSET
SEPTEMBER 16 2025.....SUNRISE 6:47 AM MDT SUNSET 7:13 PM MDT
SEPTEMBER 17 2025.....SUNRISE 6:48 AM MDT SUNSET 7:11 PM MDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$