In December, Cincinnati typically sees daytime highs of 6.1°C and overnight lows around -3.3°C. Compared to the annual average high of 18.1°C, December runs -12.0°C.
December in Cincinnati averages a daytime high of 6.1°C and an overnight low of -3.3°C.
December runs -12.0°C compared to Cincinnati's annual average high of 18.1°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 6.1°C and cooler evenings around -3.3°C.