January weather forecast and climate
New Jersey, USA

January is the peak of the winter season in New Jersey, with cold days and freezing nights. Trenton, the capital in the lower north, registers temperatures in the cold 23°F (-5°C) to 39°F (3.9°C), while Atlantic City in the south is a few degrees milder between 29°F (-1.7°C) to 42°F (5.6°C). Nights rarely rise above freezing, and occasionally even day temperatures are below the freezing mark.
Although the coast is relatively warmer than the highlands, the ocean water is cold to the tune of 42°F (5.6°C) and unsuitable for swimming. The fishing season is a net gainer in the winter with plenty of lobsters and crabs for the taking in the high seas.
The snowfall is in the range of 4" (102mm) to 8" (203mm) in the majority of the regions, with icy precipitation of 4" (102mm) to 5" (127mm) compounding the conditions. Expect the daily sunlight to last only for 5 hours and the daylight at its lowest of the year. January seldom attracts people to New Jersey except for business trips.