261
CDUS45 KRIW 140045
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
645 PM MDT SAT SEP 13 2025
...............................
..THE CASPER WY CLIMATE SUMMARY FOR SEPTEMBER 13 2025
VALID TODAY AS OF 0600 PM LOCAL TIME.
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)
TODAY
MAXIMUM 77 2:54 PM 89 1981 77 0 74
2006
MINIMUM 46 5:40 AM 23 1949 43 3 41
AVERAGE 62 60 2 58
PRECIPITATION (IN)
TODAY T 0.95 1982 0.03 -0.03 0.00
MONTH TO DATE 0.01 0.33 -0.32 0.17
SINCE SEP 1 0.01 0.33 -0.32 0.17
SINCE JAN 1 7.32 9.16 -1.84 7.15
SNOWFALL (IN)
TODAY MM 0.1 MM 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 MM
DEGREE DAYS
HEATING
TODAY 3 6 -3 7
MONTH TO DATE 39 55 -16 14
SINCE SEP 1 39 55 -16 14
SINCE JUL 1 49 100 -51 52
COOLING
TODAY 0 1 -1 0
MONTH TO DATE 15 23 -8 51
SINCE SEP 1 15 23 -8 51
SINCE JAN 1 465 435 30 526
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 22 HIGHEST WIND DIRECTION SW (210)
HIGHEST GUST SPEED 28 HIGHEST GUST DIRECTION SW (210)
AVERAGE WIND SPEED 12.0
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 80
LOWEST 22
AVERAGE 51
......................................................
THE CASPER WY CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 77 92 1948
MINIMUM TEMPERATURE (F) 43 28 1961
SUNRISE AND SUNSET
SEPTEMBER 13 2025.....SUNRISE 6:44 AM MDT SUNSET 7:19 PM MDT
SEPTEMBER 14 2025.....SUNRISE 6:45 AM MDT SUNSET 7:17 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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