356
CDUS45 KRIW 190731
CLIP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
131 AM MDT TUE AUG 19 2025
...............................
..THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR AUGUST 18 2025
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1998 TO 2025
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...............................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 78 4:16 PM 83 2020 71 7 77
MINIMUM 37 5:43 AM 29 2015 37 0 44
AVERAGE 58 54 4 61
PRECIPITATION (IN)
YESTERDAY 0.00 1.06 2005 0.05 -0.05 0.00
MONTH TO DATE 0.09 0.77 -0.68 0.96
SINCE JUN 1 1.48 4.66 -3.18 2.70
SINCE JAN 1 10.71 14.69 -3.98 14.90
DEGREE DAYS
HEATING
YESTERDAY 7 11 -4 4
MONTH TO DATE 162 174 -12 163
SINCE JUN 1 835 1008 -173 854
SINCE JUL 1 393 470 -77 425
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE JUN 1 1 0 1 0
SINCE JAN 1 1 0 1 0
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION W (280)
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION S (190)
AVERAGE WIND SPEED 2.0
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 97 3:00 AM
LOWEST 16 4:00 PM
AVERAGE 57
......................................................
THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 70 81 2013
MINIMUM TEMPERATURE (F) 37 28 2015
SUNRISE AND SUNSET
AUGUST 19 2025........SUNRISE 6:30 AM MDT SUNSET 8:20 PM MDT
AUGUST 20 2025........SUNRISE 6:31 AM MDT SUNSET 8:18 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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