Winters in Neuilly-sur-Marne are quite chilly, with temperatures often dropping below freezing and averaging around 4-6°C. As the seasons transition into spring, temperatures gradually warm up, reaching averages of 7-8°C by March and April. Summer is mild to warm, with July and August being the hottest months, but still relatively cool compared to other parts of France, with average highs in the mid-20s. Autumn brings a slight cooling trend, with September and October temperatures averaging around 11-17°C. By winter again, temperatures drop back down to averages of 4-6°C, with occasional colder spells.