In December, La Seyne-sur-Mer typically sees daytime highs of 12.5°C and overnight lows around 5.8°C. Compared to the annual average high of 18.3°C, December runs -5.8°C.
December in La Seyne-sur-Mer averages a daytime high of 12.5°C and an overnight low of 5.8°C.
December runs -5.8°C compared to La Seyne-sur-Mer's annual average high of 18.3°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 12.5°C and cooler evenings around 5.8°C.