181
CDUS45 KRIW 300734
CLIP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
134 AM MDT WED SEP 30 2026
...............................
..THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR SEPTEMBER 29 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 60 4:12 PM 72 2024 54 6 63
MINIMUM 32 6:38 AM 24 2005 27 5 37
2020
AVERAGE 46 41 5 50
PRECIPITATION (IN)
YESTERDAY 0.00 0.33 2002 0.06 -0.06 0.00
MONTH TO DATE 1.71 1.52 0.19 1.43
SINCE SEP 1 1.71 1.52 0.19 1.43
SINCE JAN 1 15.63 16.78 -1.15 13.14
DEGREE DAYS
HEATING
YESTERDAY 19 24 -5 15
MONTH TO DATE 489 563 -74 466
SINCE SEP 1 489 563 -74 466
SINCE JUL 1 857 1205 -348 982
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 9 HIGHEST WIND DIRECTION W (290)
HIGHEST GUST SPEED 14 HIGHEST GUST DIRECTION NW (330)
AVERAGE WIND SPEED 2.6
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 37 4:00 PM
AVERAGE 69
......................................................
THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 53 72 2011
MINIMUM TEMPERATURE (F) 27 20 2021
SUNRISE AND SUNSET
SEPTEMBER 30 2026.....SUNRISE 7:18 AM MDT SUNSET 7:04 PM MDT
OCTOBER 1 2026.......SUNRISE 7:20 AM MDT SUNSET 7:02 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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