Climatological Report (Daily)
Issued by NWS
Issued by NWS
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CDUS45 KRIW 110734
CLIP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
134 AM MDT THU SEP 11 2025
...................................
...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR SEPTEMBER 10 2025...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1998 TO 2025
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...................................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 70 MM 75 2021 63 7 74
MINIMUM 35 MM 22 2007 32 3 33
AVERAGE 53 47 6 54
PRECIPITATION (IN)
YESTERDAY 0.04 0.24 2014 0.05 -0.01 0.00
MONTH TO DATE 0.84 0.50 0.34 0.14
SINCE SEP 1 0.84 0.50 0.34 0.14
SINCE JAN 1 12.55 15.76 -3.21 15.33
DEGREE DAYS
HEATING
YESTERDAY 12 18 -6 11
MONTH TO DATE 119 163 -44 107
SINCE SEP 1 119 163 -44 107
SINCE JUL 1 635 805 -170 684
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE SEP 1 0 0 0 0
SINCE JAN 1 1 0 1 0
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 5 HIGHEST WIND DIRECTION W (250)
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION E (99)
AVERAGE WIND SPEED 1.6
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 12:00 AM
LOWEST 26 3:00 PM
AVERAGE 63
..........................................................
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 2025.....SUNRISE 6:56 AM MDT SUNSET 7:39 PM MDT
SEPTEMBER 12 2025.....SUNRISE 6:58 AM MDT SUNSET 7:37 PM MDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$