In December, Houston typically sees daytime highs of 18.3°C and overnight lows around 6.7°C. Compared to the annual average high of 26.2°C, December runs -7.8°C.
December in Houston averages a daytime high of 18.3°C and an overnight low of 6.7°C.
December runs -7.8°C compared to Houston's annual average high of 26.2°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 18.3°C and cooler evenings around 6.7°C.