584
CDUS45 KRIW 140727
CLIP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
127 AM MDT SUN SEP 14 2025
...............................
..THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR SEPTEMBER 13 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 58 12:35 PM 73 2015 62 -4 50
MINIMUM 35 11:59 PM 24 2003 31 4 29
2012
2014
AVERAGE 47 46 1 40
PRECIPITATION (IN)
YESTERDAY 0.02 0.68 2023 0.05 -0.03 0.00
MONTH TO DATE 0.86 0.65 0.21 0.54
SINCE SEP 1 0.86 0.65 0.21 0.54
SINCE JAN 1 12.57 15.91 -3.34 15.73
DEGREE DAYS
HEATING
YESTERDAY 18 19 -1 25
MONTH TO DATE 154 218 -64 172
SINCE SEP 1 154 218 -64 172
SINCE JUL 1 670 860 -190 749
COOLING
YESTERDAY 0 0 0 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 10 HIGHEST WIND DIRECTION W (290)
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION NW (300)
AVERAGE WIND SPEED 0.9
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 9:00 PM
LOWEST 45 2:00 PM
AVERAGE 71
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THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 62 74 2020
MINIMUM TEMPERATURE (F) 31 22 2003
SUNRISE AND SUNSET
SEPTEMBER 14 2025.....SUNRISE 7:00 AM MDT SUNSET 7:33 PM MDT
SEPTEMBER 15 2025.....SUNRISE 7:01 AM MDT SUNSET 7:32 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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