The start of winter weather and end of pleasant fall weather in this area can be anywere between the end of October and end of December and the begining of pleasant spring weather can be early March or late May.
So no guarantee that if you keep the boat in water you may go sailing between October and April.
The river above Trenton is not tidal and is shallower than below Trenton. This section of the river frequently freezes solid and when it breaks up is the source of our ice chunks further down river.
Washinton Crossing the Delaware about 25 miles up river from Trenton