447
CDUS45 KRIW 170727
CLIGEY
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
127 AM MDT SUN MAY 17 2026
...............................
..THE GREYBULL WY CLIMATE SUMMARY FOR MAY 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 75 3:10 PM 90 2012 71 4 66
MINIMUM 40 4:57 AM 36 2009 44 -4 41
AVERAGE 58 57 1 54
PRECIPITATION (IN)
YESTERDAY 0.00 0.30 2016 0.04 -0.04 T
MONTH TO DATE 0.22 0.57 -0.35 1.35
SINCE MAR 1 1.12 1.32 -0.20 2.27
SINCE JAN 1 1.16 1.59 -0.43 2.48
DEGREE DAYS
HEATING
YESTERDAY 7 8 -1 11
MONTH TO DATE 131 179 -48 129
SINCE MAR 1 1250 1569 -319 1409
SINCE JUL 1 5638 7393 -1755 6894
COOLING
YESTERDAY 0 1 -1 0
MONTH TO DATE 10 2 8 9
SINCE MAR 1 10 3 7 9
SINCE JAN 1 10 3 7 9
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WIND (MPH)
HIGHEST WIND SPEED 39 HIGHEST WIND DIRECTION NW (330)
HIGHEST GUST SPEED 52 HIGHEST GUST DIRECTION NW (330)
AVERAGE WIND SPEED 10.3
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.2
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 55 5:00 AM
LOWEST 12 2:00 PM
AVERAGE 34
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THE GREYBULL WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 71 89 2006
MINIMUM TEMPERATURE (F) 44 35 1999
SUNRISE AND SUNSET
MAY 17 2026...........SUNRISE 5:42 AM MDT SUNSET 8:36 PM MDT
MAY 18 2026...........SUNRISE 5:41 AM MDT SUNSET 8:37 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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