603
CDUS45 KRIW 200734
CLIRIW
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
134 AM MDT SUN SEP 20 2026
...............................
..THE RIVERTON WY CLIMATE SUMMARY FOR SEPTEMBER 19 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 70 MM 90 2010 73 -3 78
MINIMUM 49 MM 32 1996 43 6 46
AVERAGE 60 58 2 62
PRECIPITATION (IN)
YESTERDAY 0.77R 0.46 0.02 0.75 0.00
MONTH TO DATE 0.96 0.39 0.57 0.08
SINCE SEP 1 0.96 0.39 0.57 0.08
SINCE JAN 1 3.93 6.75 -2.82 6.33
SNOWFALL (IN)
YESTERDAY MM 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 MM
DEGREE DAYS
HEATING
YESTERDAY 5 8 -3 3
MONTH TO DATE 30 92 -62 55
SINCE SEP 1 30 92 -62 55
SINCE JUL 1 32 128 -96 58
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 43 28 15 36
SINCE SEP 1 43 28 15 36
SINCE JAN 1 756 496 260 610
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WIND (MPH)
HIGHEST WIND SPEED 25 HIGHEST WIND DIRECTION N (20)
HIGHEST GUST SPEED 39 HIGHEST GUST DIRECTION N (360)
AVERAGE WIND SPEED 9.7
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.3
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
THUNDERSTORM
RAIN
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 96 6:00 AM
LOWEST 44 3:00 PM
AVERAGE 70
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THE RIVERTON WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 72 86 2016
MINIMUM TEMPERATURE (F) 43 34 2000
SUNRISE AND SUNSET
SEPTEMBER 20 2026.....SUNRISE 6:59 AM MDT SUNSET 7:14 PM MDT
SEPTEMBER 21 2026.....SUNRISE 7:00 AM MDT SUNSET 7:13 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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