Climatological Report (Daily)
Issued by NWS
Issued by NWS
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CDUS45 KRIW 100727
CLIP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
127 AM MDT THU SEP 10 2026
...................................
...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR SEPTEMBER 9 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 64 4:07 PM 81 2021 64 0 67
MINIMUM 27 6:15 AM 18 2020 32 -5 33
AVERAGE 46 48 -2 50
PRECIPITATION (IN)
YESTERDAY 0.00 0.28 2014 0.05 -0.05 0.04
MONTH TO DATE 0.33 0.45 -0.12 0.80
SINCE SEP 1 0.33 0.45 -0.12 0.80
SINCE JAN 1 14.25 15.71 -1.46 12.51
DEGREE DAYS
HEATING
YESTERDAY 19 17 2 15
MONTH TO DATE 139 145 -6 107
SINCE SEP 1 139 145 -6 107
SINCE JUL 1 507 787 -280 623
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 15 HIGHEST WIND DIRECTION W (280)
HIGHEST GUST SPEED 26 HIGHEST GUST DIRECTION W (280)
AVERAGE WIND SPEED 3.5
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 21 1:00 PM
AVERAGE 55
..........................................................
THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 63 75 2021
MINIMUM TEMPERATURE (F) 32 22 2007
SUNRISE AND SUNSET
SEPTEMBER 10 2026.....SUNRISE 6:55 AM MDT SUNSET 7:41 PM MDT
SEPTEMBER 11 2026.....SUNRISE 6:56 AM MDT SUNSET 7:39 PM MDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$