878
CDUS45 KRIW 090730
CLIP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
130 AM MDT TUE SEP 09 2025
...............................
..THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR SEPTEMBER 8 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 67 4:14 PM 79 2021 64 3 73
MINIMUM 34 6:29 AM 21 2020 32 2 33
AVERAGE 51 48 3 53
PRECIPITATION (IN)
YESTERDAY 0.00 0.19 2003 0.06 -0.06 0.00
MONTH TO DATE 0.76 0.40 0.36 0.14
SINCE SEP 1 0.76 0.40 0.36 0.14
SINCE JAN 1 12.47 15.66 -3.19 15.33
DEGREE DAYS
HEATING
YESTERDAY 14 17 -3 12
MONTH TO DATE 92 128 -36 85
SINCE SEP 1 92 128 -36 85
SINCE JUL 1 608 770 -162 662
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 14 HIGHEST WIND DIRECTION W (270)
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION W (260)
AVERAGE WIND SPEED 2.1
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 1:00 AM
LOWEST 20 4:00 PM
AVERAGE 60
......................................................
THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 64 81 2021
MINIMUM TEMPERATURE (F) 32 18 2020
SUNRISE AND SUNSET
SEPTEMBER 9 2025.....SUNRISE 6:54 AM MDT SUNSET 7:43 PM MDT
SEPTEMBER 10 2025.....SUNRISE 6:55 AM MDT SUNSET 7:41 PM MDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page