In December, Reykjavik typically sees daytime highs of 1.1°C and overnight lows around -4.2°C. Compared to the annual average high of 6.9°C, December runs -5.8°C.
December in Reykjavik averages a daytime high of 1.1°C and an overnight low of -4.2°C.
December runs -5.8°C compared to Reykjavik's annual average high of 6.9°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 1.1°C and cooler evenings around -4.2°C.