803
CDUS45 KRIW 170731
CLIGEY
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
131 AM MDT THU SEP 17 2026
...............................
..THE GREYBULL WY CLIMATE SUMMARY FOR SEPTEMBER 16 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 81 4:12 PM 96 2000 77 4 72
MINIMUM 42 5:57 AM 38 1999 45 -3 41
2005
AVERAGE 62 61 1 57
PRECIPITATION (IN)
YESTERDAY 0.00 0.25 2006 0.02 -0.02 0.00
MONTH TO DATE 0.02 0.38 -0.36 0.12
SINCE SEP 1 0.02 0.38 -0.36 0.12
SINCE JAN 1 2.36 4.20 -1.84 4.32
DEGREE DAYS
HEATING
YESTERDAY 3 5 -2 8
MONTH TO DATE 23 54 -31 29
SINCE SEP 1 23 54 -31 29
SINCE JUL 1 25 73 -48 29
COOLING
YESTERDAY 0 1 -1 0
MONTH TO DATE 55 39 16 45
SINCE SEP 1 55 39 16 45
SINCE JAN 1 853 735 118 786
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION NW (330)
HIGHEST GUST SPEED 19 HIGHEST GUST DIRECTION NW (330)
AVERAGE WIND SPEED 4.6
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 73 6:00 AM
LOWEST 20 3:00 PM
AVERAGE 47
......................................................
THE GREYBULL WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 76 89 2004
MINIMUM TEMPERATURE (F) 45 34 2003
SUNRISE AND SUNSET
SEPTEMBER 17 2026.....SUNRISE 6:54 AM MDT SUNSET 7:19 PM MDT
SEPTEMBER 18 2026.....SUNRISE 6:55 AM MDT SUNSET 7:17 PM MDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page