The average annual rainfall is , with the large majority of it falling from October to April. Much of the autumn and spring rain falls in heavy downpours on a limited number of days, but in winter it is spread more evenly over many days. Summer receives very little rainfall, if any. Snow is rare, except in the mountainous eastern suburbs, where snowfall occurs due to the region's high altitudes. Hail (which can often be heavy) occurs a few times per year, mostly during winter.