In December, Weymouth typically sees daytime highs of 8.2°C and overnight lows around 4.3°C. Compared to the annual average high of 12.9°C, December runs -4.7°C.
December in Weymouth averages a daytime high of 8.2°C and an overnight low of 4.3°C.
December runs -4.7°C compared to Weymouth's annual average high of 12.9°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 8.2°C and cooler evenings around 4.3°C.