556
CDUS45 KRIW 180733
CLIP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
133 AM MDT MON MAY 18 2026
...............................
..THE LAKE YELLOWSTONE 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 39 1:46 PM 69 2007 51 -12 48
MINIMUM 24 6:05 AM 18 1999 27 -3 32
AVERAGE 32 39 -7 40
PRECIPITATION (IN)
YESTERDAY 0.01 0.50 2017 0.07 -0.06 0.12
MONTH TO DATE 0.09 1.15 -1.06 0.84
SINCE MAR 1 4.01 5.33 -1.32 3.92
SINCE JAN 1 7.36 8.83 -1.47 7.62
DEGREE DAYS
HEATING
YESTERDAY 33 26 7 25
MONTH TO DATE 394 488 -94 416
SINCE MAR 1 2466 2934 -468 1611
SINCE JUL 1 9436 11138 -1702 8531
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 NW (310)
HIGHEST GUST SPEED 29 HIGHEST GUST DIRECTION N (340)
AVERAGE WIND SPEED 4.6
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 81 2:00 AM
LOWEST 34 1:00 PM
AVERAGE 58
......................................................
THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 51 69 2007
2009
MINIMUM TEMPERATURE (F) 27 20 2003
2011
SUNRISE AND SUNSET
MAY 18 2026...........SUNRISE 5:51 AM MDT SUNSET 8:46 PM MDT
MAY 19 2026...........SUNRISE 5:50 AM MDT SUNSET 8:47 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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