Winters in Clamart are chilly, with average temperatures ranging from around freezing point to a moderate high of 14°C in January. The cold snap typically lasts until February, when temperatures begin to rise slightly, allowing for occasional warmer days up to 19°C. Spring is marked by steady warming, with March and April seeing significant increases in temperature, reaching averages of 7°C and 8°C respectively. Summers are mild, with June and July experiencing the warmest temperatures, peaking at around 18-19°C on average, before slowly cooling down again in September. Autumn's temperatures fluctuate significantly, dropping back to near-freezing levels by November, before rising slightly into December.