In December, Ilion typically sees daytime highs of 11.9°C and overnight lows around 5.4°C. Compared to the annual average high of 20.5°C, December runs -8.6°C.
December in Ilion averages a daytime high of 11.9°C and an overnight low of 5.4°C.
December runs -8.6°C compared to Ilion's annual average high of 20.5°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 11.9°C and cooler evenings around 5.4°C.