In December, Fairfield typically sees daytime highs of 12.7°C and overnight lows around 3.6°C. Compared to the annual average high of 21.5°C, December runs -8.9°C.
December in Fairfield averages a daytime high of 12.7°C and an overnight low of 3.6°C.
December runs -8.9°C compared to Fairfield's annual average high of 21.5°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 12.7°C and cooler evenings around 3.6°C.