799
CDUS45 KRIW 170731
CLIRIW
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
131 AM MDT THU SEP 17 2026
...............................
..THE RIVERTON WY CLIMATE SUMMARY FOR SEPTEMBER 16 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 80 4:37 PM 93 2000 74 6 68
MINIMUM 48 3:38 AM 35 2006 44 4 40
AVERAGE 64 59 5 54
PRECIPITATION (IN)
YESTERDAY T 0.10 0.03 -0.03 0.01
MONTH TO DATE T 0.32 -0.32 0.08
SINCE SEP 1 T 0.32 -0.32 0.08
SINCE JAN 1 2.97 6.68 -3.71 6.33
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 1 6 -5 11
MONTH TO DATE 21 70 -49 37
SINCE SEP 1 21 70 -49 37
SINCE JUL 1 23 106 -83 40
COOLING
YESTERDAY 0 1 -1 0
MONTH TO DATE 43 26 17 36
SINCE SEP 1 43 26 17 36
SINCE JAN 1 756 494 262 610
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION S (180)
HIGHEST GUST SPEED 26 HIGHEST GUST DIRECTION S (180)
AVERAGE WIND SPEED 9.8
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 72 8:00 AM
LOWEST 28 4:00 PM
AVERAGE 50
......................................................
THE RIVERTON WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 74 85 2004
2018
MINIMUM TEMPERATURE (F) 44 34 1996
SUNRISE AND SUNSET
SEPTEMBER 17 2026.....SUNRISE 6:56 AM MDT SUNSET 7:20 PM MDT
SEPTEMBER 18 2026.....SUNRISE 6:57 AM MDT SUNSET 7:18 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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