Weather For December 2025 Houston Weather. Commonly rain, from time to time fog, at times thunderstorm, uncommonly snow and expect refreshing weather. Get the monthly weather forecast for houston, tx, including daily high/low, historical averages, to help you plan ahead.

The average temperature is 15.0°c (59°f), with highs of 18.9°c (65.9°f) and lows of 11.5°c (52.6°f). December weather in houston texas, united states.