In December, Plymouth typically sees daytime highs of -3.1°C and overnight lows around -12.0°C. Compared to the annual average high of 12.2°C, December runs -15.3°C.
December in Plymouth averages a daytime high of -3.1°C and an overnight low of -12.0°C.
December runs -15.3°C compared to Plymouth's annual average high of 12.2°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near -3.1°C and cooler evenings around -12.0°C.