650
CDUS45 KRIW 150734
CLIP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
134 AM MDT FRI MAY 15 2026
...............................
..THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR MAY 14 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 54 3:51 PM 64 2006 50 4 43
2013
MINIMUM 28 5:37 AM 16 1999 26 2 30
AVERAGE 41 38 3 37
PRECIPITATION (IN)
YESTERDAY 0.00 0.32 2009 0.08 -0.08 0.11
MONTH TO DATE 0.08 0.93 -0.85 0.27
SINCE MAR 1 4.00 5.11 -1.11 3.35
SINCE JAN 1 7.35 8.61 -1.26 7.05
DEGREE DAYS
HEATING
YESTERDAY 24 27 -3 28
MONTH TO DATE 310 409 -99 332
SINCE MAR 1 2382 2855 -473 1527
SINCE JUL 1 9352 11059 -1707 8447
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 20 HIGHEST WIND DIRECTION W (280)
HIGHEST GUST SPEED 34 HIGHEST GUST DIRECTION SW (220)
AVERAGE WIND SPEED 6.6
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 71 5:00 AM
LOWEST 22 2:00 PM
AVERAGE 47
......................................................
THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 50 65 2013
MINIMUM TEMPERATURE (F) 26 19 1999
SUNRISE AND SUNSET
MAY 15 2026...........SUNRISE 5:54 AM MDT SUNSET 8:43 PM MDT
MAY 16 2026...........SUNRISE 5:53 AM MDT SUNSET 8:44 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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