In December, Plymouth typically sees daytime highs of 9.0°C and overnight lows around 4.0°C. Compared to the annual average high of 13.4°C, December runs -4.4°C.
December in Plymouth averages a daytime high of 9.0°C and an overnight low of 4.0°C.
December runs -4.4°C compared to Plymouth's annual average high of 13.4°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 9.0°C and cooler evenings around 4.0°C.