When to Visit AdelaideAdelaide has a temperate climate enjoying mild winters and dry summers. Most rain falls during the winter, whilst summer (particularly inland) can be very hot. Spring, between September – November, averages 12 - 25oC; Summer, between December – February, averages 15 - 29oC; Autumn, between March – May, averages 14 - 25oC; and Winter, between June – August, averages 8 - 17oC. The best time to visit is in summer when it is warm and relatively dry. Spring and autumn are also pleasant with low rainfall, although temperatures get a little cooler.