298
CDUS45 KRIW 180728
CLIP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
128 AM MDT TUE AUG 18 2026
...............................
..THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR AUGUST 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 68 4:07 PM 85 2020 71 -3 72
MINIMUM 45 11:59 PM 28 2009 37 8 40
AVERAGE 57 54 3 56
PRECIPITATION (IN)
YESTERDAY 0.17 0.62 2007 0.04 0.13 0.02
MONTH TO DATE 1.92 0.72 1.20 0.09
SINCE JUN 1 4.88 4.61 0.27 1.48
SINCE JAN 1 13.12 14.64 -1.52 10.71
DEGREE DAYS
HEATING
YESTERDAY 8 11 -3 9
MONTH TO DATE 137 163 -26 155
SINCE JUN 1 767 997 -230 828
SINCE JUL 1 253 459 -206 386
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE JUN 1 2 0 2 1
SINCE JAN 1 2 0 2 1
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WIND (MPH)
HIGHEST WIND SPEED 10 HIGHEST WIND DIRECTION W (280)
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION N (20)
AVERAGE WIND SPEED 1.9
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 52 1:00 PM
AVERAGE 75
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THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 71 83 2020
MINIMUM TEMPERATURE (F) 37 29 2015
SUNRISE AND SUNSET
AUGUST 18 2026........SUNRISE 6:28 AM MDT SUNSET 8:22 PM MDT
AUGUST 19 2026........SUNRISE 6:29 AM MDT SUNSET 8:20 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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