285
CDUS45 KRIW 300734
CLIGEY
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
134 AM MDT WED SEP 30 2026
...............................
..THE GREYBULL WY CLIMATE SUMMARY FOR SEPTEMBER 29 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 76 4:50 PM 97 2024 69 7 83
MINIMUM 42 6:18 AM 27 1999 40 2 55
AVERAGE 59 55 4 69
PRECIPITATION (IN)
YESTERDAY 0.00 0.26 2014 0.03 -0.03 0.00
MONTH TO DATE 0.17 0.80 -0.63 0.65
SINCE SEP 1 0.17 0.80 -0.63 0.65
SINCE JAN 1 2.51 4.62 -2.11 4.85
DEGREE DAYS
HEATING
YESTERDAY 6 11 -5 0
MONTH TO DATE 66 159 -93 61
SINCE SEP 1 66 159 -93 61
SINCE JUL 1 68 178 -110 61
COOLING
YESTERDAY 0 0 0 4
MONTH TO DATE 57 44 13 50
SINCE SEP 1 57 44 13 50
SINCE JAN 1 855 740 115 791
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 10 HIGHEST WIND DIRECTION S (180)
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION S (170)
AVERAGE WIND SPEED 3.5
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 86 5:00 AM
LOWEST 21 4:00 PM
AVERAGE 54
......................................................
THE GREYBULL WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 69 86 2015
MINIMUM TEMPERATURE (F) 40 29 2021
SUNRISE AND SUNSET
SEPTEMBER 30 2026.....SUNRISE 7:09 AM MDT SUNSET 6:54 PM MDT
OCTOBER 1 2026.......SUNRISE 7:10 AM MDT SUNSET 6:53 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