Winters in Champs-Sur-Marne are chilly, with temperatures often below freezing and averaging around 4-6°C. Spring brings a gradual warming trend, with March and April averages rising to 7-8°C. Summer months are warm, but not hot, with July and August highs reaching up to 29-31°C, while still experiencing cooler mornings. Autumn is mild, with temperatures decreasing gradually from October's average of 11°C back down to winter levels by November and December.