In December, London typically sees daytime highs of 0.4°C and overnight lows around -6.4°C. Compared to the annual average high of 12.6°C, December runs -12.2°C.
December in London averages a daytime high of 0.4°C and an overnight low of -6.4°C.
December runs -12.2°C compared to London's annual average high of 12.6°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 0.4°C and cooler evenings around -6.4°C.