In December, Cergy typically sees daytime highs of 6.5°C and overnight lows around 1.0°C. Compared to the annual average high of 14.6°C, December runs -8.0°C.
December in Cergy averages a daytime high of 6.5°C and an overnight low of 1.0°C.
December runs -8.0°C compared to Cergy's annual average high of 14.6°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 6.5°C and cooler evenings around 1.0°C.