December 2024 Weather In New York City. In new york, december temperatures are quite chilly. Get the monthly weather forecast for new york city, ny, including daily high/low, historical averages, to help you plan ahead.
Daily high temperatures decrease by 7°f, from 49°f to 42°f, rarely falling below 29°f or exceeding 60°f. On warmer days, the highest temperatures can reach about 43.5°f.