Climatological Report (Daily)
Issued by NWS
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683
CDUS45 KRIW 200734
CLIGEY
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
134 AM MDT SUN SEP 20 2026
...................................
...THE GREYBULL WY CLIMATE SUMMARY FOR SEPTEMBER 19 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 69 MM 92 2010 75 -6 80
MINIMUM 54 MM 30 2003 44 10 45
AVERAGE 62 59 3 63
PRECIPITATION (IN)
YESTERDAY 0.00 0.22 2018 0.03 -0.03 0.00
MONTH TO DATE 0.03 0.47 -0.44 0.12
SINCE SEP 1 0.03 0.47 -0.44 0.12
SINCE JAN 1 2.37 4.29 -1.92 4.32
DEGREE DAYS
HEATING
YESTERDAY 3 6 -3 2
MONTH TO DATE 31 72 -41 41
SINCE SEP 1 31 72 -41 41
SINCE JUL 1 33 91 -58 41
COOLING
YESTERDAY 0 1 -1 0
MONTH TO DATE 55 42 13 45
SINCE SEP 1 55 42 13 45
SINCE JAN 1 853 738 115 786
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 24 HIGHEST WIND DIRECTION NW (300)
HIGHEST GUST SPEED 33 HIGHEST GUST DIRECTION W (290)
AVERAGE WIND SPEED 11.3
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 12:00 AM
LOWEST 52 4:00 PM
AVERAGE 73
..........................................................
THE GREYBULL WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 75 85 2016
MINIMUM TEMPERATURE (F) 43 31 1999
SUNRISE AND SUNSET
SEPTEMBER 20 2026.....SUNRISE 6:57 AM MDT SUNSET 7:13 PM MDT
SEPTEMBER 21 2026.....SUNRISE 6:58 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.
$$