143
CDUS45 KRIW 090728
CLIP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
128 AM MDT WED SEP 09 2026
...............................
..THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR SEPTEMBER 8 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 59 3:02 PM 79 2021 64 -5 67
MINIMUM 27 6:33 AM 21 2020 32 -5 34
AVERAGE 43 48 -5 51
PRECIPITATION (IN)
YESTERDAY 0.00 0.19 2003 0.06 -0.06 0.00
MONTH TO DATE 0.33 0.40 -0.07 0.76
SINCE SEP 1 0.33 0.40 -0.07 0.76
SINCE JAN 1 14.25 15.66 -1.41 12.47
DEGREE DAYS
HEATING
YESTERDAY 22 17 5 14
MONTH TO DATE 120 128 -8 92
SINCE SEP 1 120 128 -8 92
SINCE JUL 1 488 770 -282 608
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 17 HIGHEST WIND DIRECTION W (280)
HIGHEST GUST SPEED 29 HIGHEST GUST DIRECTION SW (230)
AVERAGE WIND SPEED 4.3
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 89 7:00 AM
LOWEST 23 5:00 PM
AVERAGE 56
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THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 64 81 2021
MINIMUM TEMPERATURE (F) 32 18 2020
SUNRISE AND SUNSET
SEPTEMBER 9 2026.....SUNRISE 6:54 AM MDT SUNSET 7:43 PM MDT
SEPTEMBER 10 2026.....SUNRISE 6:55 AM MDT SUNSET 7:41 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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