696
CDUS45 KRIW 010735
CLIP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
135 AM MDT WED OCT 01 2025
...............................
..THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR SEPTEMBER 30 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 58 1:17 PM 72 2011 53 5 54
MINIMUM 35 4:29 AM 20 2021 27 8 25
AVERAGE 47 40 7 40
PRECIPITATION (IN)
YESTERDAY 0.03 0.70 2013 0.05 -0.02 0.00
MONTH TO DATE 1.46 1.57 -0.11 1.43
SINCE SEP 1 1.46 1.57 -0.11 1.43
SINCE JAN 1 13.17 16.83 -3.66 16.62
DEGREE DAYS
HEATING
YESTERDAY 18 25 -7 25
MONTH TO DATE 484 588 -104 479
SINCE SEP 1 484 588 -104 479
SINCE JUL 1 1000 1230 -230 1056
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 12 HIGHEST WIND DIRECTION W (250)
HIGHEST GUST SPEED 24 HIGHEST GUST DIRECTION W (250)
AVERAGE WIND SPEED 2.3
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 96 7:00 AM
LOWEST 52 5:00 PM
AVERAGE 74
......................................................
THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 53 72 2011
MINIMUM TEMPERATURE (F) 27 22 2002
2021
2024
SUNRISE AND SUNSET
OCTOBER 1 2025.......SUNRISE 7:20 AM MDT SUNSET 7:02 PM MDT
OCTOBER 2 2025.......SUNRISE 7:21 AM MDT SUNSET 7:00 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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