In December, Weymouth typically sees daytime highs of 4.5°C and overnight lows around -4.5°C. Compared to the annual average high of 15.1°C, December runs -10.6°C.
December in Weymouth averages a daytime high of 4.5°C and an overnight low of -4.5°C.
December runs -10.6°C compared to Weymouth's annual average high of 15.1°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 4.5°C and cooler evenings around -4.5°C.