23 



Monthly and Annual Mean Surface Water Temperatures, F 



1941 -------- 54.5 



Mean 37.2 34.8 34.8 37.6 44.6 52.7 57.7 58.8 56.4 50.3 48.7 40.8 46.2 

 Two readings per day at 8 A.M. and 6 P.M. 



Source - USBF 



