924
CDUS45 KRIW 120728
CLIP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
128 AM MDT FRI SEP 12 2025
...............................
..THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR SEPTEMBER 11 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 MM MM 73 2017 63 MM 59
2022
MINIMUM MM MM 22 2014 31 MM 44
AVERAGE MM 47 MM 52
PRECIPITATION (IN)
YESTERDAY MM 0.37 2019 0.05 MM 0.19
MONTH TO DATE 0.84 0.55 0.29 0.33
SINCE SEP 1 0.84 0.55 0.29 0.33
SINCE JAN 1 12.55 15.81 -3.26 15.52
DEGREE DAYS
HEATING
YESTERDAY MM 18 MM 13
MONTH TO DATE 119 181 -62 120
SINCE SEP 1 119 181 -62 120
SINCE JUL 1 635 823 -188 697
COOLING
YESTERDAY MM 0 MM 0
MONTH TO DATE 0 0 0 0
SINCE SEP 1 0 0 0 0
SINCE JAN 1 1 0 1 0
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WIND (MPH)
HIGHEST WIND SPEED MM HIGHEST WIND DIRECTION MM
HIGHEST GUST SPEED MM HIGHEST GUST DIRECTION MM
AVERAGE WIND SPEED MM
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER MM
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST MM
LOWEST MM
AVERAGE MM
......................................................
THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 62 75 2017
MINIMUM TEMPERATURE (F) 31 18 2014
SUNRISE AND SUNSET
SEPTEMBER 12 2025.....SUNRISE 6:58 AM MDT SUNSET 7:37 PM MDT
SEPTEMBER 13 2025.....SUNRISE 6:59 AM MDT SUNSET 7:35 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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