In January, Plymouth typically sees daytime highs of -6.7°C and overnight lows around -16.9°C. Compared to the annual average high of 12.2°C, January runs -18.9°C.
January in Plymouth averages a daytime high of -6.7°C and an overnight low of -16.9°C.
January runs -18.9°C compared to Plymouth's annual average high of 12.2°C, ranking #12 of 12 months by warmth.
Plan for daytime highs near -6.7°C and cooler evenings around -16.9°C.