719
CDUS45 KRIW 180726
CLIP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
126 AM MDT FRI SEP 18 2026
...............................
..THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR SEPTEMBER 17 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 54 5:19 PM 73 2009 60 -6 60
2020
MINIMUM 39 3:45 AM 24 2003 30 9 29
2017
AVERAGE 47 45 2 45
PRECIPITATION (IN)
YESTERDAY 0.32 0.68 2013 0.05 0.27 0.00
MONTH TO DATE 0.67 0.85 -0.18 1.19
SINCE SEP 1 0.67 0.85 -0.18 1.19
SINCE JAN 1 14.59 16.11 -1.52 12.90
DEGREE DAYS
HEATING
YESTERDAY 18 20 -2 20
MONTH TO DATE 279 296 -17 254
SINCE SEP 1 279 296 -17 254
SINCE JUL 1 647 938 -291 770
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 7 HIGHEST WIND DIRECTION NW (300)
HIGHEST GUST SPEED 12 HIGHEST GUST DIRECTION SE (130)
AVERAGE WIND SPEED 1.3
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 100 9:00 PM
LOWEST 79 12:00 AM
AVERAGE 90
......................................................
THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 60 75 2009
MINIMUM TEMPERATURE (F) 30 18 2003
SUNRISE AND SUNSET
SEPTEMBER 18 2026.....SUNRISE 7:04 AM MDT SUNSET 7:26 PM MDT
SEPTEMBER 19 2026.....SUNRISE 7:05 AM MDT SUNSET 7:24 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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