In December, Oshkosh typically sees daytime highs of -1.1°C and overnight lows around -9.7°C. Compared to the annual average high of 12.8°C, December runs -13.9°C.
December in Oshkosh averages a daytime high of -1.1°C and an overnight low of -9.7°C.
December runs -13.9°C compared to Oshkosh's annual average high of 12.8°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near -1.1°C and cooler evenings around -9.7°C.