3A 



o 

 Uonthly and Annual Mean Surface Water Tonperatures, F 



Ann. 



1956 40.1 38.9 38.3 39.4 ----- _-__ 



(9) (9) (9) (7) (2) (2) (5) (8) (7) (8) (8) (8) 

 Mean 42.1 40.5 39.9 41.1 45.9 51.7 57.2 62.7 59.9 55.0 51.2 45.2 49.3 



Readings at 0130, 0730, 1330 and 1930 EST 

 Source - NIfRC 



