124 



Monthly and annual Mean Surface IVater Temperatures, °F 

 DRY TORTUGAS LIGHT TTATION, FLORIDA 24°38'04"N. 82°55'42"W. 



Year Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Ann. 



1925 - - - - - 81.9 83.6 84.7 84.0 81.0 76.8 73.0 - 



1926 70.0 67.9 67.5 71.7 76.4 78.9 80.1 83.1 83.4 81.2 76.2 74.3 75.9 



28 71.5 - 73.6 74.2 76.2 83.5 84.6 84.4 85.0 83.2 76.5 72.2 (78.1) 



29 71.7 73.7 73.9 79.6 80.6 81.7 83.0 - - 76.9 77.0 - 



1930 70.1 72.1 74.2 74.5 80.7 82.1 85.2 85.2 83.9 81.0 74.7 71.8 78.0 



1931 66.0 69.5 71.8 73.2 79.0 83.2 84.7 84.6 84.4 81.8 76.6 78.8 77.8 



32 74.3 77.8 74.5 74.8 80.3 83.2 85.2 85.2 84.8 84.7 75.7 74.4 79.6 



33 76.2 73.3 74.5 80.1 80.4 82.8 85.8 85.9 85.1 82.5 78.1 72.5 79.8 



34 72.2 69.8 72.6 75.2 79.8 80.0 85.0 84.3 83.4 81.6 74.4 73.4 77.6 



(8) (7) (8) (8) (8) (9) (9) (8) (8) (9) (9) (8) 



Mean 71.5 72.0 72.8 75.4 79.2 81.9 84.1 84.7 84.2 81.5 76.2 73-8 78.1 



Readings at 8 a.m. and 6 p.m. 

 Source - USBF 



