146  
CDUS42 KKEY 182118  
CLIMTH  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE KEY WEST FL  
418 PM EST MON DEC 18 2023  
   
...............................  
 
   
..THE MARATHON CLIMATE SUMMARY FOR DECEMBER 18 2023  
 
VALID TODAY AS OF 0400 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD 1991 TO 2020  
CLIMATE RECORD PERIOD 1950 TO 2023  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................  
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 75 144 PM 88 2016 78 -3 82  
MINIMUM 65 608 AM 50 1982 67 -2 71  
AVERAGE 70 72 -2 77  
 
PRECIPITATION (IN)  
TODAY 0.00 0.79 2009 0.08 -0.08 0.67  
MONTH TO DATE 3.37 1.40 1.97 1.72  
SINCE DEC 1 3.37 1.40 1.97 1.72  
SINCE JAN 1 47.35 38.92 8.43 33.21  
 
DEGREE DAYS  
HEATING  
TODAY 0 0 0 0  
MONTH TO DATE 0 5 -5 0  
SINCE DEC 1 0 5 -5 0  
SINCE JUL 1 0 6 -6 0  
 
COOLING  
TODAY 5 8 -3 12  
MONTH TO DATE 161 161 0 231  
SINCE DEC 1 161 161 0 231  
SINCE JAN 1 6031 5032 999 5713    
...............................................................  
 
WIND (MPH)  
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION NW (320)  
HIGHEST GUST SPEED 24 HIGHEST GUST DIRECTION NW (320)  
AVERAGE WIND SPEED 6.8  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.3  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93  
LOWEST 62  
AVERAGE 78  
   
......................................................  
 
THE MARATHON CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 78 88 2016  
MINIMUM TEMPERATURE (F) 67 49 1950  
 
SUNRISE AND SUNSET  
DECEMBER 18 2023......SUNRISE 703 AM EST SUNSET 539 PM EST  
DECEMBER 19 2023......SUNRISE 703 AM EST SUNSET 540 PM EST  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 
 
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