Carshalton's weather is mild and variable, with temperatures often fluctuating significantly between winter and summer. Winters are generally cool, with temperatures ranging from around 0-13°C on average, while springs see a gradual warming trend, reaching highs of up to 23°C in March. Summers are warm, but not hot, with July being the warmest month at an average of 18°C. Autumn and winter months experience cooler temperatures, often dipping below freezing, while spring and summer enjoy milder conditions. Overall, Carshalton's climate is relatively stable, but with a noticeable seasonal change.