196
CDUS45 KRIW 100731
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
131 AM MDT WED SEP 10 2025
...............................
..THE CASPER WY CLIMATE SUMMARY FOR SEPTEMBER 9 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 82 3:27 PM 95 2021 79 3 88
MINIMUM 44 5:31 AM 24 2020 45 -1 57
AVERAGE 63 62 1
PRECIPITATION (IN)
YESTERDAY T 0.46 1940 0.02 -0.02 0.00
MONTH TO DATE 0.01 0.21 -0.20 0.15
SINCE SEP 1 0.01 0.21 -0.20 0.15
SINCE JAN 1 7.32 9.04 -1.72 7.13
SNOWFALL (IN)
YESTERDAY 0.0 0.0 2020 0.0 0.0 0.0
MONTH TO DATE 0.0 0.1 -0.1 0.0
SINCE SEP 1 0.0 0.1 -0.1 0.0
SINCE JUL 1 0.0 0.1 -0.1 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 2 5 -3 0
MONTH TO DATE 32 33 -1 7
SINCE SEP 1 32 33 -1 7
SINCE JUL 1 42 78 -36 45
COOLING
YESTERDAY 0 2 -2 8
MONTH TO DATE 7 19 -12 39
SINCE SEP 1 7 19 -12 39
SINCE JAN 1 457 431 26 514
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 28 HIGHEST WIND DIRECTION S (170)
HIGHEST GUST SPEED 37 HIGHEST GUST DIRECTION S (160)
AVERAGE WIND SPEED 8.2
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
THUNDERSTORM
LIGHT RAIN
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 71 6:00 AM
LOWEST 19 3:00 PM
AVERAGE 45
......................................................
THE CASPER WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 79 95 2021
MINIMUM TEMPERATURE (F) 44 27 2020
SUNRISE AND SUNSET
SEPTEMBER 10 2025.....SUNRISE 6:41 AM MDT SUNSET 7:24 PM MDT
SEPTEMBER 11 2025.....SUNRISE 6:42 AM MDT SUNSET 7:22 PM MDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page