In December, Dayton typically sees daytime highs of 4.3°C and overnight lows around -4.6°C. Compared to the annual average high of 16.6°C, December runs -12.3°C.
December in Dayton averages a daytime high of 4.3°C and an overnight low of -4.6°C.
December runs -12.3°C compared to Dayton's annual average high of 16.6°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 4.3°C and cooler evenings around -4.6°C.