Chelles, France experiences a moderate climate with distinct seasonal changes. Winters are cool and sometimes chilly, with temperatures ranging from around 0°C in January and February to as low as -7°C in February, averaging around 4-6°C. As spring arrives, temperatures gradually rise, reaching an average of 12°C in May, making it a pleasant time of year. Summers are warm but not hot, with July being the warmest month, averaging around 19°C, while winters can be quite cold, especially from November to March. Autumn and spring are generally mild, with temperatures fluctuating between 0-25°C, creating a comfortable environment for outdoor activities.