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Monthly and Annual Mean Surface Aater Temperatures, °F 



CH.'iRLLSTON LIGHTSHIP 32°40.7'N 79°42.9'W (1925-28) 



32 41.0 N 79 43.0 W (1929-33) 



Apr. May June July Aug. Sept. Oct. Nov. Dec. Ann. 



71.7 77.4 81.9 81.5 81.6 75.5 62.0 54.1 - 



59.5 68.0 75.4 79.2 82.1 81.4 73.6 60.0 54.8 65.5 



61.6 66.2 74.3 76.8 80.3 76.5 73.7 62.5 54.4 64.6 

 66.6 71.3 76.1 79.9 80.5 77.3 70.1 65.5 54.5 66.9 



62.6 72.3 76.6 79.4 78.7 81.6 71.7 60.7 52.8 66.6 



60.8 70.1 77.2 83.2 79.2 80.3 74.1 66.1 62.8 67.2 



63.0 71.8 77.8 81.6 79.8 78.5 72.4 63.3 55.7 68.5 



63.7 72.4 78.8 - - - - - - - 



(7) (7) (7) (7) (8) (8) (7) (7) (7) (7) (7) (7) 



Mean 52.4 52.8 55.2 62.5 70.5 76.7 80.3 80.3 79.6 73.0 62.9 55.6 66.8 



Readings at 8 am. and 6 pm. 

 Source - USBF 



