526
CDUS45 KRIW 210727
CLIP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
127 AM MDT THU MAY 21 2026
...............................
..THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR MAY 20 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 50 3:52 PM 66 2002 52 -2 44
MINIMUM 26 5:13 AM 17 2003 28 -2 27
AVERAGE 38 40 -2 36
PRECIPITATION (IN)
YESTERDAY 0.00 0.49 2025 0.08 -0.08 0.49
MONTH TO DATE 0.09 1.39 -1.30 2.26
SINCE MAR 1 4.01 5.57 -1.56 5.34
SINCE JAN 1 7.36 9.07 -1.71 9.04
DEGREE DAYS
HEATING
YESTERDAY 27 25 2 29
MONTH TO DATE 487 564 -77 504
SINCE MAR 1 2559 3010 -451 1699
SINCE JUL 1 9529 11214 -1685 8619
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE MAR 1 0 0 0 0
SINCE JAN 1 0 0 0 0
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION W (280)
HIGHEST GUST SPEED 26 HIGHEST GUST DIRECTION NW (300)
AVERAGE WIND SPEED 3.2
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 92 11:00 PM
LOWEST 29 2:00 PM
AVERAGE 61
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THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 52 68 2012
MINIMUM TEMPERATURE (F) 28 17 2001
SUNRISE AND SUNSET
MAY 21 2026...........SUNRISE 5:48 AM MDT SUNSET 8:49 PM MDT
MAY 22 2026...........SUNRISE 5:47 AM MDT SUNSET 8:50 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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