Climatological Report (Daily)
Issued by NWS
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911
CDUS45 KRIW 060728
CLIP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
128 AM MDT SUN SEP 06 2026
...................................
...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR SEPTEMBER 5 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 71 4:42 PM 82 2020 65 6 68
MINIMUM 39 6:36 AM 24 2008 33 6 33
AVERAGE 55 49 6 51
PRECIPITATION (IN)
YESTERDAY 0.00 0.21 2015 0.05 -0.05 0.00
MONTH TO DATE 0.20 0.24 -0.04 0.00
SINCE SEP 1 0.20 0.24 -0.04 0.00
SINCE JAN 1 14.12 15.50 -1.38 11.71
DEGREE DAYS
HEATING
YESTERDAY 10 16 -6 14
MONTH TO DATE 65 78 -13 52
SINCE SEP 1 65 78 -13 52
SINCE JUL 1 433 720 -287 568
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 10 HIGHEST WIND DIRECTION W (280)
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION W (270)
AVERAGE WIND SPEED 2.5
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 5:00 AM
LOWEST 22 4:00 PM
AVERAGE 56
..........................................................
THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 65 82 2022
MINIMUM TEMPERATURE (F) 32 22 2010
SUNRISE AND SUNSET
SEPTEMBER 6 2026.....SUNRISE 6:50 AM MDT SUNSET 7:49 PM MDT
SEPTEMBER 7 2026.....SUNRISE 6:51 AM MDT SUNSET 7:47 PM MDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$