390
CDUS45 KRIW 280727
CLIP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
127 AM MDT MON SEP 28 2026
...............................
..THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR SEPTEMBER 27 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 64 1:49 PM 73 2001 55 9 66
MINIMUM 33 2:44 AM 24 2000 28 5 28
2020
AVERAGE 49 41 8 47
PRECIPITATION (IN)
YESTERDAY 0.00 0.39 2014 0.06 -0.06 0.00
MONTH TO DATE 1.57 1.41 0.16 1.36
SINCE SEP 1 1.57 1.41 0.16 1.36
SINCE JAN 1 15.49 16.67 -1.18 13.07
DEGREE DAYS
HEATING
YESTERDAY 16 24 -8 18
MONTH TO DATE 447 515 -68 434
SINCE SEP 1 447 515 -68 434
SINCE JUL 1 815 1157 -342 950
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE SEP 1 0 0 0 0
SINCE JAN 1 2 0 2 1
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 9 HIGHEST WIND DIRECTION W (270)
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION SW (210)
AVERAGE WIND SPEED 1.8
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 89 5:00 AM
LOWEST 31 2:00 PM
AVERAGE 60
......................................................
THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 55 73 2010
2024
MINIMUM TEMPERATURE (F) 27 19 2020
SUNRISE AND SUNSET
SEPTEMBER 28 2026.....SUNRISE 7:16 AM MDT SUNSET 7:08 PM MDT
SEPTEMBER 29 2026.....SUNRISE 7:17 AM MDT SUNSET 7:06 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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