450  
CDUS45 KRIW 210729  
CLIP60  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE RIVERTON WY  
1229 AM MST SAT DEC 21 2024  
   
...............................  
 
   
..THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR DECEMBER 20 2024  
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1998 TO 2024  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................  
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 37R 3:07 PM 34 2023 23 14 34  
MINIMUM 8 4:58 AM -28 1998 2 6 19  
AVERAGE 23 12 11 27  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.44 2017 0.07 -0.07 0.04  
MONTH TO DATE 0.58 1.47 -0.89 1.07  
SINCE DEC 1 0.58 1.47 -0.89 1.07  
SINCE JAN 1 18.96 22.21 -3.25 27.17  
 
DEGREE DAYS  
HEATING  
YESTERDAY 42 53 -11 38  
MONTH TO DATE 913 1029 -116 911  
SINCE DEC 1 913 1029 -116 911  
SINCE JUL 1 4020 4536 -516 3985  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 0 0 0 0    
...............................................................  
 
WIND (MPH)  
HIGHEST WIND SPEED 6 HIGHEST WIND DIRECTION NW (300)  
HIGHEST GUST SPEED 10 HIGHEST GUST DIRECTION SW (210)  
AVERAGE WIND SPEED 0.9  
 
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 88 6:00 PM  
LOWEST 56 3:00 PM  
AVERAGE 72  
   
......................................................  
 
THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 23 37 2019  
2023  
MINIMUM TEMPERATURE (F) 2 -34 1998  
 
SUNRISE AND SUNSET  
DECEMBER 21 2024......SUNRISE 7:55 AM MST SUNSET 4:45 PM MST  
DECEMBER 22 2024......SUNRISE 7:56 AM MST SUNSET 4:45 PM MST  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 
 
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