In December, Derry typically sees daytime highs of 6.8°C and overnight lows around 2.1°C. Compared to the annual average high of 11.9°C, December runs -5.1°C.
December in Derry averages a daytime high of 6.8°C and an overnight low of 2.1°C.
December runs -5.1°C compared to Derry's annual average high of 11.9°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 6.8°C and cooler evenings around 2.1°C.