The coldest, recorded temperature in New Jersey is -34 degreesF. It was observed in River Vale on January 5, 1904.
A bit of a trivia, the coldest temperature ever officially recorded in the USA was in Alaska. It was -79.8 degrees rounded off to 80 degrees and was observed at Prospect Creek Camp in the Endicott Mountains of northern Alaska on Jan. 23, 1971. Find a list of state by state low temperature records at USA Today.
Find the daily weather forecast and view current conditions for New Jersey at the National Weather Service - New Jersey Forecast.