In January, Fairfield typically sees daytime highs of 12.1°C and overnight lows around 3.4°C. Compared to the annual average high of 21.5°C, January runs -9.4°C.
January in Fairfield averages a daytime high of 12.1°C and an overnight low of 3.4°C.
January runs -9.4°C compared to Fairfield's annual average high of 21.5°C, ranking #12 of 12 months by warmth.
Plan for daytime highs near 12.1°C and cooler evenings around 3.4°C.