In December, Temecula typically sees daytime highs of 19.6°C and overnight lows around 4.5°C. Compared to the annual average high of 24.6°C, December runs -5.0°C.
December in Temecula averages a daytime high of 19.6°C and an overnight low of 4.5°C.
December runs -5.0°C compared to Temecula's annual average high of 24.6°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 19.6°C and cooler evenings around 4.5°C.