Climatological Report (Daily)
Issued by NWS
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CDUS45 KRIW 230728
CLIGEY
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
128 AM MDT TUE SEP 23 2025
...................................
...THE GREYBULL WY CLIMATE SUMMARY FOR SEPTEMBER 22 2025...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1998 TO 2025
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...................................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 67 3:58 AM 90 2007 73 -6 77
MINIMUM 50 11:57 PM 30 2002 43 7 35
2003
AVERAGE 59 58 1 56
PRECIPITATION (IN)
YESTERDAY 0.53R 0.31 2023 0.03 0.50 0.00
MONTH TO DATE 0.65 0.57 0.08 0.38
SINCE SEP 1 0.65 0.57 0.08 0.38
SINCE JAN 1 4.85 4.39 0.46 5.69
DEGREE DAYS
HEATING
YESTERDAY 6 8 -2 9
MONTH TO DATE 47 94 -47 51
SINCE SEP 1 47 94 -47 51
SINCE JUL 1 47 113 -66 64
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 46 44 2 69
SINCE SEP 1 46 44 2 69
SINCE JAN 1 787 740 47 810
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 32 HIGHEST WIND DIRECTION NW (310)
HIGHEST GUST SPEED 44 HIGHEST GUST DIRECTION NW (310)
AVERAGE WIND SPEED 12.7
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 10:00 PM
LOWEST 38 12:00 AM
AVERAGE 66
..........................................................
THE GREYBULL WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 73 89 2015
MINIMUM TEMPERATURE (F) 42 29 2000
SUNRISE AND SUNSET
SEPTEMBER 23 2025.....SUNRISE 7:01 AM MDT SUNSET 7:07 PM MDT
SEPTEMBER 24 2025.....SUNRISE 7:02 AM MDT SUNSET 7:05 PM MDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$