In December, Chelmsford typically sees daytime highs of 7.1°C and overnight lows around 2.5°C. Compared to the annual average high of 13.3°C, December runs -6.2°C.
December in Chelmsford averages a daytime high of 7.1°C and an overnight low of 2.5°C.
December runs -6.2°C compared to Chelmsford's annual average high of 13.3°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 7.1°C and cooler evenings around 2.5°C.