Early summer · Weather & things to do
Sydney in December
Sydney edges warmer than November, with highs of 75°F (24°C), lows of 65°F (18°C) and about 2.8 in (72 mm) of rain.
It scores 84/100 for comfort, 7th of 12, which makes it a solid shoulder-season month.
- Avg high
- 75°F (24°C)
- Avg low
- 65°F (18°C)
- Rain
- 2.8 in (72 mm)
- Humidity
- 73%
- Cloud cover
- 60%
- Daylight
- ~14 h 15 min
- Comfort score
- 84/100 · Great
What December feels like
Highs settle around 75°F (24°C), warm enough for short sleeves most of the day.
Nights cool to an average low of 65°F (18°C).
Some rain is likely, about 2.8 in (72 mm) in the month, so pack for a shower or two.
Plan around December
December is shoulder season: good weather, a step below the best months (April & May and July – October).
- Longest days of the year, about 14 h 15 min of daylight.
- Comfort holds steady from November (82 → 84/100).
- Our Sydney, Blue Mountains & the Reef route recommends May – Oct, so December falls outside its suggested window.
What to pack for December
- Light, breathable clotheshighs average 75°F
- Sunscreen, sunglasses and a hathigh UV on clear days
- Packable rain jacket or umbrellaabout 2.8 in of rain
- Comfortable walking shoesmost picks involve some walking
What to do in Sydney in December
December is good outdoor weather here, so these picks lean toward the open air.
The Rocks
Sydney's oldest quarter of sandstone lanes, pubs and a weekend market.
Royal Botanic Garden Sydney
Harbourside gardens leading to Mrs Macquarie's Chair and its Opera House view.
Why now December scores 84/100 for comfort, good conditions for being outside.
Manly Ferry
30-minute public ferry across the harbour from Circular Quay to Manly's surf beach.
Why now Highs near 75°F and 2.8 in of monthly rain make this an easy outdoor pick.
Opera Bar
Outdoor bar under the Opera House with views of the bridge and harbour.
Bondi to Coogee Coastal Walk
6 km clifftop path past ocean pools, Tamarama and Bronte beaches and Waverley Cemetery.
Why now One to do outside while the weather is on your side.
Nearby in December
- Blue Mountains in December~53 mi · highs 76°F, 3.1 in rain · similar daytime temperatures, about as wet
NASA POWER 2001–2025 monthly averages on a ~50 km grid. Comfort scores weigh temperature, rain, humidity and cloud: see how we score each month. Check a forecast before you go.
Sydney in December: quick answers
Is December a good time to visit Sydney?
It's a good shoulder-season choice, scoring 84/100 against a best of 94 in April & May and July – October. Expect highs of 75°F (24°C) and 2.8 in (72 mm) of rain. Our Sydney, Blue Mountains & the Reef route recommends May – Oct, so December is outside its suggested window.
How hot is Sydney in December?
Average highs are 75°F (24°C) and average lows 65°F (18°C), making it the 3rd-warmest month by daytime highs.
Does it rain a lot in Sydney in December?
Some: about 2.8 in (72 mm) of rain falls across December on average, the 6th-driest month of the year. The annual total is about 35.0 in (888 mm).
What should I pack for Sydney in December?
Bring light, breathable clothes (highs average 75°F), sunscreen, sunglasses and a hat (high UV on clear days), packable rain jacket or umbrella (about 2.8 in of rain) and comfortable walking shoes (most picks involve some walking).
Planning Sydney in December?
Share this December plan with your group, poll everyone on dates and keep the packing list in one place.