In December, New Brunswick typically sees daytime highs of 5.7°C and overnight lows around -3.4°C. Compared to the annual average high of 17.0°C, December runs -11.3°C.
December in New Brunswick averages a daytime high of 5.7°C and an overnight low of -3.4°C.
December runs -11.3°C compared to New Brunswick's annual average high of 17.0°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 5.7°C and cooler evenings around -3.4°C.