886
CDUS45 KRIW 290731
CLIP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
131 AM MDT TUE SEP 29 2026
...............................
..THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR SEPTEMBER 28 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 52 1:05 PM 73 2010 55 -3 64
2024
MINIMUM 31 11:41 PM 19 2020 27 4 31
AVERAGE 42 41 1 48
PRECIPITATION (IN)
YESTERDAY 0.14 0.70 2019 0.05 0.09 0.07
MONTH TO DATE 1.71 1.46 0.25 1.43
SINCE SEP 1 1.71 1.46 0.25 1.43
SINCE JAN 1 15.63 16.72 -1.09 13.14
DEGREE DAYS
HEATING
YESTERDAY 23 24 -1 17
MONTH TO DATE 470 539 -69 451
SINCE SEP 1 470 539 -69 451
SINCE JUL 1 838 1181 -343 967
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 13 HIGHEST WIND DIRECTION NW (330)
HIGHEST GUST SPEED 25 HIGHEST GUST DIRECTION N (340)
AVERAGE WIND SPEED 2.3
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 100 10:00 PM
LOWEST 68 3:00 AM
AVERAGE 84
......................................................
THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 54 72 2024
MINIMUM TEMPERATURE (F) 27 24 2005
2020
SUNRISE AND SUNSET
SEPTEMBER 29 2026.....SUNRISE 7:17 AM MDT SUNSET 7:06 PM MDT
SEPTEMBER 30 2026.....SUNRISE 7:18 AM MDT SUNSET 7:04 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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