In December, Dubuque typically sees daytime highs of -0.4°C and overnight lows around -8.9°C. Compared to the annual average high of 13.9°C, December runs -14.2°C.
December in Dubuque averages a daytime high of -0.4°C and an overnight low of -8.9°C.
December runs -14.2°C compared to Dubuque's annual average high of 13.9°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near -0.4°C and cooler evenings around -8.9°C.