458
CDUS45 KRIW 210732
CLIRIW
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
132 AM MDT MON SEP 21 2026
...............................
..THE RIVERTON WY CLIMATE SUMMARY FOR SEPTEMBER 20 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 62 4:36 PM 86 2016 72 -10 79
MINIMUM 46 7:16 AM 34 2000 43 3 51
AVERAGE 54 57 -3 65
PRECIPITATION (IN)
YESTERDAY 0.57R 0.39 0.04 0.53 0.00
MONTH TO DATE 1.53 0.43 1.10 0.08
SINCE SEP 1 1.53 0.43 1.10 0.08
SINCE JAN 1 4.50 6.79 -2.29 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 11 8 3 0
MONTH TO DATE 41 100 -59 55
SINCE SEP 1 41 100 -59 55
SINCE JUL 1 43 136 -93 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 12 HIGHEST WIND DIRECTION NE (50)
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION E (70)
AVERAGE WIND SPEED 5.5
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
RAIN
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 12:00 AM
LOWEST 56 4:00 PM
AVERAGE 77
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THE RIVERTON WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 71 84 2001
MINIMUM TEMPERATURE (F) 43 30 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.
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