Winters in Clichy-sous-Bois are chilly and unpredictable, with temperatures often dipping below freezing in January and February, but can occasionally rise to mild highs. As spring approaches, temperatures gradually warm up, with March and April seeing a significant increase in average temperature. Summers are warm and sunny, with July and August averaging around 19°C, although occasional heatwaves can push temperatures into the mid-30s. Autumn brings a return to cooler temperatures, with September and October experiencing mild highs and lows, before winter's chill sets back in.