709
CDUS45 KRIW 130732
CLIP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
132 AM MDT SUN SEP 13 2026
...............................
..THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR SEPTEMBER 12 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 67 1:20 PM 75 2017 62 5 64
MINIMUM 28 6:18 AM 18 2014 31 -3 32
AVERAGE 48 47 1 48
PRECIPITATION (IN)
YESTERDAY 0.00 0.76 2016 0.05 -0.05 0.00
MONTH TO DATE 0.33 0.60 -0.27 1.13
SINCE SEP 1 0.33 0.60 -0.27 1.13
SINCE JAN 1 14.25 15.86 -1.61 12.84
DEGREE DAYS
HEATING
YESTERDAY 17 18 -1 17
MONTH TO DATE 186 199 -13 154
SINCE SEP 1 186 199 -13 154
SINCE JUL 1 554 841 -287 670
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 14 HIGHEST WIND DIRECTION W (270)
HIGHEST GUST SPEED 27 HIGHEST GUST DIRECTION W (260)
AVERAGE WIND SPEED 3.0
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 89 6:00 AM
LOWEST 21 1:00 PM
AVERAGE 55
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THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 62 73 2015
MINIMUM TEMPERATURE (F) 31 24 2003
2012
2014
SUNRISE AND SUNSET
SEPTEMBER 13 2026.....SUNRISE 6:58 AM MDT SUNSET 7:36 PM MDT
SEPTEMBER 14 2026.....SUNRISE 7:00 AM MDT SUNSET 7:34 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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