In December, Decatur typically sees daytime highs of 11.9°C and overnight lows around 0.5°C. Compared to the annual average high of 22.1°C, December runs -10.2°C.
December in Decatur averages a daytime high of 11.9°C and an overnight low of 0.5°C.
December runs -10.2°C compared to Decatur's annual average high of 22.1°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 11.9°C and cooler evenings around 0.5°C.