La Courneuve's weather is quite varied throughout the year. Winters are cool and unpredictable, with temperatures often fluctuating between freezing and mild, averaging around 4-6°C in January and December. Spring brings a gradual warming trend, with March and April temperatures rising to an average of 7-8°C, while May sees a significant jump to 12°C. Summers are warm but not hot, with July being the warmest month at around 19°C on average. Autumn is mild, with September and October temperatures ranging from 3-23°C, before cooling off again in November and December.