Taking into account the local weather in Northport is an important factor for planning your visit, especially if you plan to spend your trip poolside. The hottest months are usually July and August with an average temp of 65°F, while the coldest months are December and January with an average of 26°F. The snowiest months in Northport are January, December, October, and February, with each month seeing an average of 11 inches of snowfall.