854
CDUS45 KRIW 180726
CLIGEY
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
126 AM MDT FRI SEP 18 2026
...............................
..THE GREYBULL WY CLIMATE SUMMARY FOR SEPTEMBER 17 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 74 1:57 PM 89 2004 76 -2 72
MINIMUM 48 6:21 AM 34 2003 45 3 44
AVERAGE 61 60 1 58
PRECIPITATION (IN)
YESTERDAY T 0.62 2019 0.03 -0.03 0.00
MONTH TO DATE 0.02 0.41 -0.39 0.12
SINCE SEP 1 0.02 0.41 -0.39 0.12
SINCE JAN 1 2.36 4.23 -1.87 4.32
DEGREE DAYS
HEATING
YESTERDAY 4 6 -2 7
MONTH TO DATE 27 60 -33 36
SINCE SEP 1 27 60 -33 36
SINCE JUL 1 29 79 -50 36
COOLING
YESTERDAY 0 1 -1 0
MONTH TO DATE 55 40 15 45
SINCE SEP 1 55 40 15 45
SINCE JAN 1 853 736 117 786
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION E (100)
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION E (100)
AVERAGE WIND SPEED 3.5
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.2
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 74 10:00 PM
LOWEST 32 2:00 PM
AVERAGE 53
......................................................
THE GREYBULL WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 76 90 2004
2021
MINIMUM TEMPERATURE (F) 44 27 2003
SUNRISE AND SUNSET
SEPTEMBER 18 2026.....SUNRISE 6:55 AM MDT SUNSET 7:17 PM MDT
SEPTEMBER 19 2026.....SUNRISE 6:56 AM MDT SUNSET 7:15 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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