270
CDUS45 KRIW 010732
CLIP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
132 AM MDT THU OCT 01 2026
...............................
..THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR SEPTEMBER 30 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 63 3:40 PM 72 2011 53 10 58
MINIMUM 30 7:00 AM 20 2021 27 3 35
AVERAGE 47 40 7 47
PRECIPITATION (IN)
YESTERDAY 0.00 0.70 2013 0.05 -0.05 0.03
MONTH TO DATE 1.71 1.57 0.14 1.46
SINCE SEP 1 1.71 1.57 0.14 1.46
SINCE JAN 1 15.63 16.83 -1.20 13.17
DEGREE DAYS
HEATING
YESTERDAY 18 25 -7 18
MONTH TO DATE 507 588 -81 484
SINCE SEP 1 507 588 -81 484
SINCE JUL 1 875 1230 -355 1000
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 12 HIGHEST WIND DIRECTION W (260)
HIGHEST GUST SPEED 19 HIGHEST GUST DIRECTION W (270)
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 96 4:00 AM
LOWEST 30 4:00 PM
AVERAGE 63
......................................................
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 2026.......SUNRISE 7:20 AM MDT SUNSET 7:02 PM MDT
OCTOBER 2 2026.......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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