In December, Milwaukee typically sees daytime highs of 0.3°C and overnight lows around -7.1°C. Compared to the annual average high of 12.6°C, December runs -12.3°C.
December in Milwaukee averages a daytime high of 0.3°C and an overnight low of -7.1°C.
December runs -12.3°C compared to Milwaukee's annual average high of 12.6°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 0.3°C and cooler evenings around -7.1°C.