Winters in Mitcham are typically cool and unpredictable, with temperatures fluctuating between freezing point and mild highs. January and February's averages hover around 4-6°C, while December's average is slightly lower at 7°C. As spring approaches, March and April see a gentle warming trend, with temperatures rising to an average of 7°C and 6°C respectively. Summer months, particularly June and July, bring warmer conditions, with averages reaching up to 18°C. Autumn sees a cooling trend, with September and October's averages returning to around 16°C.