202  
CDUS42 KKEY 212116  
CLIMTH  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE KEY WEST FL  
416 PM EST THU DEC 21 2023  
   
...............................  
 
   
..THE MARATHON CLIMATE SUMMARY FOR DECEMBER 21 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 MM MM 87 1986 77 MM 84  
MINIMUM MM MM 47 1954 67 MM 69  
AVERAGE MM 72 MM 77  
 
PRECIPITATION (IN)  
TODAY T 0.98 1962 0.07 -0.07 0.00  
MONTH TO DATE 3.37 1.62 1.75 2.81  
SINCE DEC 1 3.37 1.62 1.75 2.81  
SINCE JAN 1 47.35 39.14 8.21 34.30  
 
DEGREE DAYS  
HEATING  
TODAY MM 1 MM 0  
MONTH TO DATE 1 7 -6 0  
SINCE DEC 1 1 7 -6 0  
SINCE JUL 1 1 8 -7 0  
 
COOLING  
TODAY MM 8 MM 12  
MONTH TO DATE 163 185 -22 263  
SINCE DEC 1 163 185 -22 263  
SINCE JAN 1 6033 5056 977 5745    
...............................................................  
 
WIND (MPH)  
HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION NE (50)  
HIGHEST GUST SPEED 27 HIGHEST GUST DIRECTION NE (60)  
AVERAGE WIND SPEED 11.9  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.9  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST MM  
LOWEST MM  
AVERAGE MM  
   
......................................................  
 
THE MARATHON CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 77 84 1999  
2022  
MINIMUM TEMPERATURE (F) 67 45 1954  
1960  
 
SUNRISE AND SUNSET  
DECEMBER 21 2023......SUNRISE 704 AM EST SUNSET 541 PM EST  
DECEMBER 22 2023......SUNRISE 705 AM EST SUNSET 541 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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