In December, Rennes typically sees daytime highs of 8.1°C and overnight lows around 2.4°C. Compared to the annual average high of 15.3°C, December runs -7.2°C.
December in Rennes averages a daytime high of 8.1°C and an overnight low of 2.4°C.
December runs -7.2°C compared to Rennes's annual average high of 15.3°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 8.1°C and cooler evenings around 2.4°C.