572
CDUS45 KRIW 180730
CLIRIW
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
130 AM MDT THU SEP 18 2025
...............................
..THE RIVERTON WY CLIMATE SUMMARY FOR SEPTEMBER 17 2025
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1995 TO 2025
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...............................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 69 3:42 PM 85 2004 74 -5 68
2018
MINIMUM 45 6:34 AM 34 1996 44 1 46
AVERAGE 57 59 -2 57
PRECIPITATION (IN)
YESTERDAY 0.00 0.44 0.02 -0.02 0.01
MONTH TO DATE 0.08 0.34 -0.26 0.07
SINCE SEP 1 0.08 0.34 -0.26 0.07
SINCE JAN 1 6.33 6.70 -0.37 5.50
SNOWFALL (IN)
YESTERDAY 0.0 1.5 2003 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 8 7 1 8
MONTH TO DATE 45 77 -32 32
SINCE SEP 1 45 77 -32 32
SINCE JUL 1 48 113 -65 50
COOLING
YESTERDAY 0 1 -1 0
MONTH TO DATE 36 27 9 47
SINCE SEP 1 36 27 9 47
SINCE JAN 1 610 495 115 589
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION NE (30)
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION NE (40)
AVERAGE WIND SPEED 6.1
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.3
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 82 6:00 AM
LOWEST 29 5:00 PM
AVERAGE 56
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THE RIVERTON WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 73 90 2014
MINIMUM TEMPERATURE (F) 44 28 2003
SUNRISE AND SUNSET
SEPTEMBER 18 2025.....SUNRISE 6:57 AM MDT SUNSET 7:18 PM MDT
SEPTEMBER 19 2025.....SUNRISE 6:58 AM MDT SUNSET 7:16 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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