558
CDUS45 KRIW 180733
CLIGEY
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
133 AM MDT MON MAY 18 2026
...............................
..THE GREYBULL WY CLIMATE SUMMARY FOR MAY 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 58 MM 89 2006 71 -13 72
MINIMUM 41 4:00 AM 35 1999 44 -3 44
AVERAGE 50 58 -8 58
PRECIPITATION (IN)
YESTERDAY 0.00 0.69 2005 0.05 -0.05 T
MONTH TO DATE 0.22 0.62 -0.40 1.35
SINCE MAR 1 1.12 1.37 -0.25 2.27
SINCE JAN 1 1.16 1.64 -0.48 2.48
DEGREE DAYS
HEATING
YESTERDAY 15 8 7 7
MONTH TO DATE 146 187 -41 136
SINCE MAR 1 1265 1577 -312 1416
SINCE JUL 1 5653 7401 -1748 6901
COOLING
YESTERDAY 0 1 -1 0
MONTH TO DATE 10 3 7 9
SINCE MAR 1 10 4 6 9
SINCE JAN 1 10 4 6 9
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WIND (MPH)
HIGHEST WIND SPEED 35 HIGHEST WIND DIRECTION NW (330)
HIGHEST GUST SPEED 47 HIGHEST GUST DIRECTION NW (320)
AVERAGE WIND SPEED 21.9
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.4
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 65 4:00 AM
LOWEST 23 4:00 PM
AVERAGE 44
......................................................
THE GREYBULL WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 71 92 2009
MINIMUM TEMPERATURE (F) 45 37 2024
SUNRISE AND SUNSET
MAY 18 2026...........SUNRISE 5:41 AM MDT SUNSET 8:37 PM MDT
MAY 19 2026...........SUNRISE 5:40 AM MDT SUNSET 8:38 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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