In December, St. John's typically sees daytime highs of 2.0°C and overnight lows around -4.3°C. Compared to the annual average high of 9.1°C, December runs -7.1°C.
December in St. John's averages a daytime high of 2.0°C and an overnight low of -4.3°C.
December runs -7.1°C compared to St. John's's annual average high of 9.1°C, ranking #9 of 12 months by warmth.
Plan for daytime highs near 2.0°C and cooler evenings around -4.3°C.