580  
CDUS42 KCHS 202106  
CLICXM  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHARLESTON SC  
506 PM EDT TUE MAY 20 2025  
   
...............................
 
 
   
..THE DOWNTOWN CHARLESTON SC CLIMATE SUMMARY FOR MAY 20 2025
 
 
VALID TODAY AS OF 0500 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD 1991 TO 2020  
CLIMATE RECORD PERIOD 1870 TO 2025  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 88 1200 PM 95 1938 80 8 78  
MINIMUM 77 1240 AM 45 1894 69 8 68  
AVERAGE 83 74 9 73  
 
PRECIPITATION (IN)  
TODAY 0.00 4.39 1932 0.07 -0.07 0.00  
MONTH TO DATE 5.33 1.45 3.88 2.89  
SINCE MAR 1 8.36 7.44 0.92 14.90  
SINCE JAN 1 11.03 12.56 -1.53 19.51  
 
DEGREE DAYS  
HEATING  
TODAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE MAR 1 172 275 -103 131  
SINCE JUL 1 1512 1619 -107 1291  
 
COOLING  
TODAY 18 10 8 8  
MONTH TO DATE 215 152 63 190  
SINCE MAR 1 380 265 115 341  
SINCE JAN 1 388 270 118 341    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION S (200)  
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION S (200)  
AVERAGE WIND SPEED 6.9  
   
......................................................
 
 
THE DOWNTOWN CHARLESTON SC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 80 99 1938  
MINIMUM TEMPERATURE (F) 69 51 1894  
 
SUNRISE AND SUNSET  
MAY 20 2025...........SUNRISE 617 AM EDT SUNSET 815 PM EDT  
MAY 21 2025...........SUNRISE 617 AM EDT SUNSET 816 PM EDT  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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