Climatological Report (Daily)
Issued by NWS
Issued by NWS
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042
CDUS45 KRIW 110813
CLIP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
213 AM MDT FRI SEP 11 2026
...................................
...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR SEPTEMBER 10 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 67 3:23 PM 75 2021 63 4 70
MINIMUM 29 6:17 AM 22 2007 32 -3 35
AVERAGE 48 47 1 53
PRECIPITATION (IN)
YESTERDAY 0.00 0.24 2014 0.05 -0.05 0.04
MONTH TO DATE 0.33 0.50 -0.17 0.84
SINCE SEP 1 0.33 0.50 -0.17 0.84
SINCE JAN 1 14.25 15.76 -1.51 12.55
DEGREE DAYS
HEATING
YESTERDAY 17 18 -1 12
MONTH TO DATE 156 163 -7 119
SINCE SEP 1 156 163 -7 119
SINCE JUL 1 524 805 -281 635
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 W (260)
HIGHEST GUST SPEED 25 HIGHEST GUST DIRECTION W (290)
AVERAGE WIND SPEED 3.3
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 6:00 AM
LOWEST 18 2:00 PM
AVERAGE 54
..........................................................
THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 63 73 2017
2022
MINIMUM TEMPERATURE (F) 31 22 2014
SUNRISE AND SUNSET
SEPTEMBER 11 2026.....SUNRISE 6:56 AM MDT SUNSET 7:39 PM MDT
SEPTEMBER 12 2026.....SUNRISE 6:57 AM MDT SUNSET 7:38 PM MDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$