376
CDUS45 KRIW 150735
CLIGEY
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
135 AM MDT TUE SEP 15 2026
...............................
..THE GREYBULL WY CLIMATE SUMMARY FOR SEPTEMBER 14 2026
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1998 TO 2026
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...............................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 75 2:41 PM 90 2015 78 -3 80
2020
MINIMUM 51 6:08 AM 35 2003 46 5 44
2007
2012
AVERAGE 63 62 1 62
PRECIPITATION (IN)
YESTERDAY 0.02 0.60 2017 0.03 -0.01 0.00
MONTH TO DATE 0.02 0.33 -0.31 0.09
SINCE SEP 1 0.02 0.33 -0.31 0.09
SINCE JAN 1 2.36 4.15 -1.79 4.29
DEGREE DAYS
HEATING
YESTERDAY 2 5 -3 3
MONTH TO DATE 12 44 -32 16
SINCE SEP 1 12 44 -32 16
SINCE JUL 1 14 63 -49 16
COOLING
YESTERDAY 0 1 -1 0
MONTH TO DATE 55 37 18 45
SINCE SEP 1 55 37 18 45
SINCE JAN 1 853 733 120 786
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 31 HIGHEST WIND DIRECTION NW (320)
HIGHEST GUST SPEED 46 HIGHEST GUST DIRECTION NW (320)
AVERAGE WIND SPEED 13.3
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.2
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
THUNDERSTORM
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 83 6:00 AM
LOWEST 17 4:00 PM
AVERAGE 50
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THE GREYBULL WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 77 96 2000
MINIMUM TEMPERATURE (F) 45 35 2003
SUNRISE AND SUNSET
SEPTEMBER 15 2026.....SUNRISE 6:51 AM MDT SUNSET 7:23 PM MDT
SEPTEMBER 16 2026.....SUNRISE 6:53 AM MDT SUNSET 7:21 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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