Sydney Weather in December
In December, Sydney averages a high of 25°C (77°F) and a low of 18°C (65°F), based on 55 years of historical weather data from SYDNEY (OBSERVATORY HILL).
25°C
Average high
77°F
18°C
Average low
65°F
41°C
Record high
106°F · 1994
3°C
Record low
38°F · 1971
What to Expect in Sydney in December
Typical December days in Sydney reach 25°C (77°F) during the afternoon and cool to around 18°C (65°F) overnight. On average, measurable rain falls on about 35% of days this month. Over the past 55 years, December temperatures in Sydney have ranged from a record high of 41°C (1994) down to a record low of 3°C (1971).
For a day-by-day look or other months, see the full Sydney weather history.