The plains surrounding the Porongurup Range have an annual rainfall of around 800 mm (32 inches) to the south and around 600 mm (24 inches) on the northern side. Most of this rain falls between April and October: although light showers are common in the summer months, the average rainfall between November and March totals only around 110 mm (4.5 inches) in the southern plains and less than 75 mm (3 inches) to the north. Summer temperatures on the plains average a very warm 26 °C (79 °F) in the daytime and decline to around 18 °C (64 °F) at night. In winter, although it can be rainy, temperatures average a very pleasant 16 °C (60 °F) during the day and a cool 8 °C (46 °F) in the morning.