Climatological Report (Daily)
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
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CDUS45 KRIW 210045
CLIRIW
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
645 PM MDT SAT SEP 20 2025
...................................
...THE RIVERTON WY CLIMATE SUMMARY FOR SEPTEMBER 20 2025...
VALID TODAY AS OF 0600 PM LOCAL TIME.
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1995 TO 2025
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...................................................................
TEMPERATURE (F)
TODAY
MAXIMUM 79 4:06 PM 86 2016 72 7 79
MINIMUM 51 3:38 AM 34 2000 43 8 47
AVERAGE 65 57 8 63
PRECIPITATION (IN)
TODAY 0.00 0.39 1998 0.04 -0.04 0.00
MONTH TO DATE 0.08 0.43 -0.35 0.07
SINCE SEP 1 0.08 0.43 -0.35 0.07
SINCE JAN 1 6.33 6.79 -0.46 5.50
SNOWFALL (IN)
TODAY MM 0.0
MONTH TO DATE 0.0 0.0
SINCE SEP 1 0.0 0.0
SINCE JUL 1 0.0 0.0
SNOW DEPTH MM
DEGREE DAYS
HEATING
TODAY 0 8 -8 2
MONTH TO DATE 55 100 -45 47
SINCE SEP 1 55 100 -45 47
SINCE JUL 1 58 136 -78 65
COOLING
TODAY 0 0 0 0
MONTH TO DATE 36 28 8 47
SINCE SEP 1 36 28 8 47
SINCE JAN 1 610 496 114 589
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION E (100)
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION SE (150)
AVERAGE WIND SPEED 4.6
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 53
LOWEST 16
AVERAGE 35
..........................................................
THE RIVERTON WY CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 71 84 2001
MINIMUM TEMPERATURE (F) 43 30 2000
SUNRISE AND SUNSET
SEPTEMBER 20 2025.....SUNRISE 6:59 AM MDT SUNSET 7:14 PM MDT
SEPTEMBER 21 2025.....SUNRISE 7:00 AM MDT SUNSET 7:12 PM MDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$