In December, Champaign typically sees daytime highs of 3.1°C and overnight lows around -5.5°C. Compared to the annual average high of 16.4°C, December runs -13.3°C.
December in Champaign averages a daytime high of 3.1°C and an overnight low of -5.5°C.
December runs -13.3°C compared to Champaign's annual average high of 16.4°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 3.1°C and cooler evenings around -5.5°C.