In December, Peoria typically sees daytime highs of 18.8°C and overnight lows around 4.6°C. Compared to the annual average high of 29.4°C, December runs -10.6°C.
December in Peoria averages a daytime high of 18.8°C and an overnight low of 4.6°C.
December runs -10.6°C compared to Peoria's annual average high of 29.4°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 18.8°C and cooler evenings around 4.6°C.