In December, Fairfield typically sees daytime highs of 4.6°C and overnight lows around -4.4°C. Compared to the annual average high of 15.8°C, December runs -11.2°C.
December in Fairfield averages a daytime high of 4.6°C and an overnight low of -4.4°C.
December runs -11.2°C compared to Fairfield's annual average high of 15.8°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 4.6°C and cooler evenings around -4.4°C.