In December, Watsonville typically sees daytime highs of 17.2°C and overnight lows around 5.8°C. Compared to the annual average high of 20.1°C, December runs -2.9°C.
December in Watsonville averages a daytime high of 17.2°C and an overnight low of 5.8°C.
December runs -2.9°C compared to Watsonville's annual average high of 20.1°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 17.2°C and cooler evenings around 5.8°C.