058
CDUS45 KRIW 220728
CLIGEY
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1228 AM MST MON DEC 22 2025
...............................
..THE GREYBULL WY CLIMATE SUMMARY FOR DECEMBER 21 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 38 3:33 PM 52 2020 29 9 40
MINIMUM 17 8:36 AM -26 2022 7 10 18
AVERAGE 28 18 10 29
PRECIPITATION (IN)
YESTERDAY 0.00 0.11 2011 0.01 -0.01 0.00
MONTH TO DATE 0.20 0.08 0.12 T
SINCE DEC 1 0.20 0.08 0.12 T
SINCE JAN 1 7.03 5.52 1.51 6.28
DEGREE DAYS
HEATING
YESTERDAY 37 47 -10 36
MONTH TO DATE 678 941 -263 735
SINCE DEC 1 678 941 -263 735
SINCE JUL 1 2051 2718 -667 2130
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE DEC 1 0 0 0 0
SINCE JAN 1 791 744 47 832
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 9 HIGHEST WIND DIRECTION W (260)
HIGHEST GUST SPEED 12 HIGHEST GUST DIRECTION NW (310)
AVERAGE WIND SPEED 2.8
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.5
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 92 2:00 AM
LOWEST 54 3:00 PM
AVERAGE 73
......................................................
THE GREYBULL WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 29 54 2020
MINIMUM TEMPERATURE (F) 6 -36 2022
SUNRISE AND SUNSET
DECEMBER 22 2025......SUNRISE 7:46 AM MST SUNSET 4:36 PM MST
DECEMBER 23 2025......SUNRISE 7:47 AM MST SUNSET 4:37 PM MST
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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