Climatological Report (Daily)
Issued by NWS
Issued by NWS
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081
CDUS45 KRIW 290729
CLIP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
129 AM MDT MON SEP 29 2025
...................................
...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR SEPTEMBER 28 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 64 2:00 PM 73 2010 55 9 73
2024
MINIMUM 31 6:42 AM 19 2020 27 4 30
AVERAGE 48 41 7 52
PRECIPITATION (IN)
YESTERDAY 0.07 0.70 2019 0.05 0.02 0.00
MONTH TO DATE 1.43 1.46 -0.03 1.43
SINCE SEP 1 1.43 1.46 -0.03 1.43
SINCE JAN 1 13.14 16.72 -3.58 16.62
DEGREE DAYS
HEATING
YESTERDAY 17 24 -7 13
MONTH TO DATE 451 539 -88 441
SINCE SEP 1 451 539 -88 441
SINCE JUL 1 967 1181 -214 1018
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 7 HIGHEST WIND DIRECTION S (160)
HIGHEST GUST SPEED 15 HIGHEST GUST DIRECTION S (200)
AVERAGE WIND SPEED 1.0
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 93 9:00 PM
LOWEST 37 2:00 PM
AVERAGE 65
..........................................................
THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 54 72 2024
MINIMUM TEMPERATURE (F) 27 24 2005
2020
SUNRISE AND SUNSET
SEPTEMBER 29 2025.....SUNRISE 7:18 AM MDT SUNSET 7:05 PM MDT
SEPTEMBER 30 2025.....SUNRISE 7:19 AM MDT SUNSET 7:03 PM MDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$