Sydney weather in December
Long-run climate averages for Sydney, New South Wales in December, plus what the forecast models say for the days ahead.
In December, Sydney averages 27°C by day and 19°C at night. The wettest month is usually January.
December in Sydney averages a daytime high of 27°C and an overnight low of 19°C, which reads as warm for this part of the world. It is the warmest month of the year here. Across the whole year Sydney sees roughly 973 mm of precipitation.
Climate averages tell you what to pack. They do not tell you what next Tuesday looks like — for that, see the live Sydney forecast with every model compared and how much they currently agree.
Sydney weather by month
what to expect in Sydney through the yearHere is Sydney's typical weather in each month: the average daytime high and overnight low in °C, how each month feels, and the wettest month marked. Use it to plan any trip to Sydney by season.