In December, Pontiac typically sees daytime highs of 1.1°C and overnight lows around -6.1°C. Compared to the annual average high of 13.9°C, December runs -12.8°C.
December in Pontiac averages a daytime high of 1.1°C and an overnight low of -6.1°C.
December runs -12.8°C compared to Pontiac's annual average high of 13.9°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 1.1°C and cooler evenings around -6.1°C.