Winters in Saint-Ouen are cool and occasionally cold, with temperatures often below freezing during the coldest months. Spring brings a gradual warming trend, with temperatures rising steadily throughout March and April. Summers are mild and pleasant, with highs often reaching the mid-twenties but rarely feeling excessively hot. Autumn is characterized by a return to cooler temperatures, with temperatures dropping back down into single digits in November and December. Overall, Saint-Ouen's climate is relatively temperate, with minimal extremes in temperature throughout the year.