Wollongong weather in December

December in Wollongong: warm, rainy, with clean air — one of the best months to visit.

Updated September 2026 · climate normals from ERA5 reanalysis

Wollongong🇦🇺 Australia · Australian East Coast · Beach84
  1. 85Jan
  2. 83Feb
  3. 78Mar
  4. 82Apr
  5. 77May
  6. 70Jun
  7. 71Jul
  8. 75Aug
  9. 80Sep
  10. 82Oct
  11. 81Nov
  12. 84Dec

#2 of 12 months in Wollongong · #358 of 1413 destinations to visit in December · comfort 84/100 (tier A)

Days
24°C
Nights
18°C
Wet days
8
Sun
11.4 h
Humidity
74%
Daylight
14 h
Wollongong, Australia
Photo: Onin · Pexels

Traveller notes on Wollongong in December

Notes from nearby Sydney (68 km away)

Wollongong doesn't have its own notes for December yet — these are about Sydney, close enough to share the season.

Regulars split this month at its own midpoint: early December can be genuinely beautiful and not that humid, while the run-up to Christmas turns hotter and more crowded as the holiday hype builds - humidity itself does not peak until January. Our row averages across both halves at 23.5C reading as 25C, with 86.6mm of rain across 9.6 days. Their sea estimate runs warmer than our column - they say 25C and above, we read 20.4C - which is the early-summer gap between a beach that has not fully warmed and a forecast built on the season's later weeks; either way a coastal breeze keeps the humidity milder than the air temperature alone suggests. The record: humidity 72 percent, 11.2 hours of sun, a 19.1 kph wind and AQI 49.
EarlyDecemberBeforeTheHumidityBuilds · December · 1 month ago · about Sydney · Read more on Tripadvisor ↗

Other months in Wollongong

Forum posters describe Wollongong's July as squarely winter, cool with genuinely variable weather, and recommend wind-proof clothing given how biting the coastal wind can turn, especially once the dry southwesterlies pick up later in winter into August-September. Posters note Wollongong sees heavy-rain days regularly but overall fewer stretches of mixed, changeable weather than Melbourne, with roughly 137 rainy days a year on average. Posters describing the following spring, September through November, note those months bring markedly clearer, crisper conditions - useful context for anyone deciding between a winter or spring visit. Posters generally rate July as cool, wind-affected and genuinely wintry for Wollongong, workable with proper layers and wind protection.
Tripadvisor community · July · 1 month ago · Read more on Tripadvisor ↗
Forum posters note Wollongong genuinely gets a lot of rain year-round - more than twice London's annual rainfall by one poster's count, with roughly 137 days of some rain a typical year - so a summer visit is never a sure bet for wall-to-wall sun. One visitor's five-day December trip (similar seasonal pattern to January) landed three good tourist days and two stormy ones spent mostly near the hotel, which posters treat as a fairly representative mix for this time of year. Despite the rain risk, posters describe January days as warm and pleasant when the weather does cooperate, with the coastal escarpment scenery and beaches making it worth building in flexibility rather than a rigid day-by-day plan.
Tripadvisor community · January · 1 month ago · Read more on Tripadvisor ↗

Add your own note from Wollongong's card on the map.

Wollongong climate normals — December

Daytime high24°C / 76°F🌤 warm
Nighttime low18°C / 64°F
Feels like (high)26°C / 79°F
Sea temperature20°C / 68°F🌊 fresh
Rainfall83 mm / 3.3 in🌧 rainy
Rainy days8 days
Humidity74%💧 humid
Dew point15°C / 60°F
Sunshine11.4 h/day
Daylight14.4 h
Wind24 km/h / 15 mph
Air quality (US AQI)43🍃 good

Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.

Crowds in Wollongong in December

How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.

Peak crowdsGrand Pacific Drive weekends, Summer holiday peak, Summer holidays in Australia(estimated)

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Peak crowdsBusyShoulder seasonQuiet

Best months for Wollongong's weather

Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).

Fair weatherWollongong's weather doesn't swing hard through the year — comfort stays fairly steady in every month.

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What's on in Wollongong in December

Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.

  • Season

    Grand Pacific Drive weekends

    1 Oct – 30 AprDay-tripper crushCrowded

    On any warm weekend the coast road down from Sydney, the Sea Cliff Bridge and the lookouts on Bald Hill are nose to tail from mid-morning. Go on a weekday or before nine and it is a different road.

  • Season

    Summer holiday peak

    18 Dec – 31 JanSchool holidaysCrowded

    The Illawarra beaches take the overflow from Sydney for six weeks, and the northern ones — Austinmer, Thirroul, Coalcliff — fill first because they are closest to the train line.

What's on around the world in December →

Nearby, and something's on

Within 300 km of Wollongong — a day trip or a short hop — with something on this month. Never part of the comfort score.

Where is Wollongong?

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Wollongong in December — FAQ

Is December a good time to visit Wollongong?
December in Wollongong: warm, rainy, with clean air — one of the best months to visit. It ranks #2 of 12 months for Wollongong on SeasonMap's comfort score (84/100).
What is the weather like in Wollongong in December?
In December, Wollongong averages a daily high of 24.2°C and a low of 17.5°C, with about 82.8 mm of rain over roughly 8.4 rainy days.
What is the air quality in Wollongong in December?
Wollongong has a mean US Air Quality Index of about 43 in December.

Within 300 km: Sydney's New Year's Eve fireworks on 31 Dec – 1 Jan, and Katoomba's Canyoning season on 1 Nov – 31 Mar.