Trappes, France experiences a mild climate with significant seasonal variation. Winters are chilly and unpredictable, with temperatures often dropping below freezing but occasionally rising into the mid-teens. As spring arrives in March, temperatures begin to stabilize, gradually warming up to a comfortable average of around 7-8°C by April. Summer months bring warm to hot conditions, with July being the hottest month, averaging around 19°C. Autumn is similarly mild, with temperatures cooling down but remaining relatively pleasant until November, when they start to drop again.