869
CDUS45 KRIW 100728
CLIP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
128 AM MDT SUN MAY 10 2026
...............................
..THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR MAY 9 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 4:42 PM 64 2007 48 6 63
MINIMUM 28 11:59 PM 9 2002 24 4 27
AVERAGE 41 36 5 45
PRECIPITATION (IN)
YESTERDAY 0.00 0.69 2014 0.07 -0.07 0.00
MONTH TO DATE 0.06 0.57 -0.51 0.02
SINCE MAR 1 3.98 4.75 -0.77 3.10
SINCE JAN 1 7.33 8.25 -0.92 6.80
DEGREE DAYS
HEATING
YESTERDAY 24 29 -5 20
MONTH TO DATE 236 271 -35 226
SINCE MAR 1 2308 2717 -409 1421
SINCE JUL 1 9278 10921 -1643 8341
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 12 HIGHEST WIND DIRECTION W (270)
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION SW (240)
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 82 6:00 AM
LOWEST 25 5:00 PM
AVERAGE 54
......................................................
THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 49 68 2025
MINIMUM TEMPERATURE (F) 25 8 2022
SUNRISE AND SUNSET
MAY 10 2026...........SUNRISE 6:00 AM MDT SUNSET 8:37 PM MDT
MAY 11 2026...........SUNRISE 5:58 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.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page