Climatological Report (Daily)
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
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CDUS45 KRIW 220045
CLIRIW
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
645 PM MDT MON SEP 21 2026
...................................
...THE RIVERTON WY CLIMATE SUMMARY FOR SEPTEMBER 21 2026...
VALID TODAY AS OF 0600 PM LOCAL TIME.
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1995 TO 2026
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...................................................................
TEMPERATURE (F)
TODAY
MAXIMUM 70 3:21 PM 84 2001 71 -1 80
MINIMUM 46 6:10 AM 30 2000 43 3 51
AVERAGE 58 57 1 66
PRECIPITATION (IN)
TODAY 0.00 0.37 1997 0.03 -0.03 T
MONTH TO DATE 1.53 0.46 1.07 0.08
SINCE SEP 1 1.53 0.46 1.07 0.08
SINCE JAN 1 4.50 6.82 -2.32 6.33
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 7 8 -1 0
MONTH TO DATE 48 108 -60 55
SINCE SEP 1 48 108 -60 55
SINCE JUL 1 50 144 -94 58
COOLING
TODAY 0 0 0 1
MONTH TO DATE 43 28 15 37
SINCE SEP 1 43 28 15 37
SINCE JAN 1 756 496 260 611
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION NE (50)
HIGHEST GUST SPEED 15 HIGHEST GUST DIRECTION SE (130)
AVERAGE WIND SPEED 5.4
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97
LOWEST 43
AVERAGE 70
..........................................................
THE RIVERTON WY CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 71 86 2007
MINIMUM TEMPERATURE (F) 42 25 2000
SUNRISE AND SUNSET
SEPTEMBER 21 2026.....SUNRISE 7:00 AM MDT SUNSET 7:13 PM MDT
SEPTEMBER 22 2026.....SUNRISE 7:01 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.
$$