Climate averages 1991–2020
Wollongong weather
in December.
A warm, moderately wet month: the 3rd warmest and the 4th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a warm month in Wollongong: daytime highs average 23.5°C and nights cool to about 17.5°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 72 mm of rain on roughly 11 days, which makes December a moderately wet month (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 24 min on an average December day.
The nearest other city in this atlas is Sydney (68 km away). In December its highs average 24.2°C, 0.7°C warmer than Wollongong, with 60 mm of rain.
Among the 32 cities listed in Australia, Wollongong ranks 26th of 32 for the warmest December highs and 17th of 32 for the driest December (rainfall, lowest first). The mean December high of those 32 cities is 26.0°C; Wollongong is 2.4°C cooler than that mean.
From December to January, average highs rise by 1.3°C to 24.8°C, and monthly rainfall rises from 72 mm to 84 mm.
The annual picture
December in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Wollongong climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 24.8°C19.2°C | 19.2°C | 84 | 10.8 | 14.214 h |
| February | 24.3°C19.4°C | 19.4°C | 118 | 12.3 | 13.413 h |
| March | 23.0°C18.3°C | 18.3°C | 109 | 13.9 | 12.312 h |
| April | 20.9°C16.0°C | 16.0°C | 95 | 11.8 | 11.311 h |
| May | 18.3°C13.5°C | 13.5°C | 97 | 10.0 | 10.410 h |
| June | 16.0°C11.7°C | 11.7°C | 123 | 10.3 | 9.910 h |
| July | 15.5°C10.5°C | 10.5°C | 66 | 7.9 | 10.110 h |
| August | 16.6°C10.7°C | 10.7°C | 63 | 6.8 | 10.811 h |
| September | 18.8°C12.3°C | 12.3°C | 59 | 7.5 | 11.812 h |
| October | 20.6°C14.1°C | 14.1°C | 73 | 9.7 | 12.913 h |
| November | 21.9°C15.7°C | 15.7°C | 85 | 10.8 | 13.914 h |
| December, selected | 23.5°C17.5°C | 17.5°C | 72 | 11.4 | 14.414 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
December in nearby cities
- Sydney in DecemberAustralia · 68 kmHigh 24.2°C · Low 17.8°C · 60 mm rain
- Blue Mountains in DecemberAustralia · 95 kmHigh 22.1°C · Low 11.0°C · 121 mm rain
- Central Coast in DecemberAustralia · 119 kmHigh 24.4°C · Low 18.4°C · 70 mm rain
- Newcastle, Australia in DecemberAustralia · 185 kmHigh 24.7°C · Low 18.6°C · 70 mm rain
- Canberra in DecemberAustralia · 187 kmHigh 24.3°C · Low 12.1°C · 55 mm rain
- Maitland in DecemberAustralia · 198 kmHigh 27.5°C · Low 17.6°C · 71 mm rain
- Tuggeranong in DecemberAustralia · 200 kmHigh 24.3°C · Low 12.1°C · 81 mm rain
- Coffs Harbour in DecemberAustralia · 504 kmHigh 25.7°C · Low 19.5°C · 150 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Wollongong) is explained once on the Wollongong year overview and on the Sources, method and limits page.