In December, Peoria typically sees daytime highs of 2.6°C and overnight lows around -6.1°C. Compared to the annual average high of 16.3°C, December runs -13.7°C.
December in Peoria averages a daytime high of 2.6°C and an overnight low of -6.1°C.
December runs -13.7°C compared to Peoria's annual average high of 16.3°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 2.6°C and cooler evenings around -6.1°C.