Winters in Eltham are typically mild, with temperatures averaging around 4-7°C, but can drop to as low as -5°C. As spring approaches, temperatures gradually rise, reaching an average of 11°C by May and peaking at highs of up to 23°C. Summers are warm, with July being the warmest month, averaging 18°C, while autumn brings a slight cooling trend, returning to averages around 12°C by October.