Epinay-sur-Seine experiences a mild climate with temperatures gradually warming up as spring arrives. March and April are marked by average highs around 7°C, while May brings warmer days, with average highs reaching 12°C. Summer months, June to August, see more stable warm temperatures, averaging around 18-19°C, before slowly cooling down in September. Autumn is cool, with October's high temperatures averaging 11°C, and November and December bring chilly weather, with temperatures occasionally dipping below freezing.