December 2024 Weather Forecast Nyc. On warmer days, the highest temperatures can reach about 43.5°f. Get the monthly weather forecast for manhattan, ny, including daily high/low, historical averages, to help you plan ahead.

Daily low temperatures decrease by 7°f, from 38°f to 31°f, rarely falling. Weather.com brings you the most accurate monthly weather forecast for manhattan, ny with average/record and high/low temperatures, precipitation and more.