892
CDUS45 KRIW 240728
CLIP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
128 AM MDT THU SEP 24 2026
...............................
..THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR SEPTEMBER 23 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 57 4:36 PM 73 2011 57 0 60
MINIMUM 34 11:59 PM 18 2000 29 5 27
AVERAGE 46 43 3 44
PRECIPITATION (IN)
YESTERDAY 0.03 0.37 2016 0.05 -0.02 0.00
MONTH TO DATE 1.57 1.18 0.39 1.36
SINCE SEP 1 1.57 1.18 0.39 1.36
SINCE JAN 1 15.49 16.44 -0.95 13.07
DEGREE DAYS
HEATING
YESTERDAY 19 22 -3 21
MONTH TO DATE 378 423 -45 365
SINCE SEP 1 378 423 -45 365
SINCE JUL 1 746 1065 -319 881
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 7 HIGHEST WIND DIRECTION E (70)
HIGHEST GUST SPEED 13 HIGHEST GUST DIRECTION W (280)
AVERAGE WIND SPEED 1.2
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 11:00 PM
LOWEST 53 5:00 PM
AVERAGE 77
......................................................
THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 57 74 2009
2011
MINIMUM TEMPERATURE (F) 28 13 2000
SUNRISE AND SUNSET
SEPTEMBER 24 2026.....SUNRISE 7:11 AM MDT SUNSET 7:15 PM MDT
SEPTEMBER 25 2026.....SUNRISE 7:12 AM MDT SUNSET 7:13 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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