93 



o 



Monthly and Annual Mean Surface Water Temperatures, F 



1956 49.1 62.5 62.2 - - 76.9 79.9 77.6 77.3 



Mean 62.8 61.2 60.8 64.7 70.7 76.2 79.4 80.6 78.4 73.9 69.0 65.8 70.3 



1923- Upr. 1928 Incl., readings at 0000, 0400, 0800, 1200, 1600 and 2000 hours. 



Source - USC&GS, 1955 

 May 1923-1940 incl., readings at 8 a.m. and 6 p.m. Source - USBF 

 1947-1956, readings at 0130, 0730, 1330 and 1930 EST. Source - NITOC. 



