Climatological Report (Daily)
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
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CDUS45 KRIW 300734
CLIRIW
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
134 AM MDT WED SEP 30 2026
...................................
...THE RIVERTON WY CLIMATE SUMMARY FOR SEPTEMBER 29 2026...
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)
YESTERDAY
MAXIMUM 72 3:52 PM 90 2024 67 5 76
MINIMUM 44 6:25 AM 29 1999 39 5 49
AVERAGE 58 53 5 63
PRECIPITATION (IN)
YESTERDAY 0.00 0.36 0.04 -0.04 T
MONTH TO DATE 1.55 0.74 0.81 0.99
SINCE SEP 1 1.55 0.74 0.81 0.99
SINCE JAN 1 4.52 7.10 -2.58 7.24
SNOWFALL (IN)
YESTERDAY 0.0 0.0 2020 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 0
DEGREE DAYS
HEATING
YESTERDAY 7 12 -5 2
MONTH TO DATE 81 192 -111 95
SINCE SEP 1 81 192 -111 95
SINCE JUL 1 83 228 -145 98
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 44 28 16 37
SINCE SEP 1 44 28 16 37
SINCE JAN 1 757 496 261 611
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION NW (310)
HIGHEST GUST SPEED 16 HIGHEST GUST DIRECTION E (110)
AVERAGE WIND SPEED 6.4
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 5:00 AM
LOWEST 29 8:00 PM
AVERAGE 61
..........................................................
THE RIVERTON WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 66 83 2023
MINIMUM TEMPERATURE (F) 39 30 2021
SUNRISE AND SUNSET
SEPTEMBER 30 2026.....SUNRISE 7:10 AM MDT SUNSET 6:56 PM MDT
OCTOBER 1 2026.......SUNRISE 7:11 AM MDT SUNSET 6:55 PM MDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$