Climate Insights for Wollongong

The climate in Wollongong is cold. The average annual temperature is -15°C and approximately 55mm of precipitation falls per year. December is the wettest month, receiving around 26mm of rainfall. Wollongong is in the Southern Hemisphere. The seasons are reversed — summer runs from December to February, while winter falls between June and August. The summer months are: December, January, February. The coldest months are August, October, July, when temperatures can drop to -22°C. Snowfall occurs from January to December, with around 55cm accumulating over the season.

Wollongong sees moderate temperature variation throughout the year, ranging from -22°C to -10°C. December is the warmest month, though highs remain moderate at -10°C with a mean of -11°C. August brings the harshest conditions, with lows dropping to -22°C and an average temperature of -17°C. Daily temperature variation is modest, with an average difference of 4°C between highs and lows. The sharpest temperature change occurs between November and December, with a 5°C shift in average temperatures.

Wollongong is a quite dry location, receiving approximately 55mm of precipitation annually, which averages out to around 5mm per month. The wettest month is December, averaging 26mm of rainfall. September and January also tend to see above-average precipitation. The driest month is February, with just 1mm. That's 25mm less than December, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic. Snowfall is a regular feature from January to December, with around 55cm accumulating over the season. December typically sees the most snow at around 26cm.

Wollongong is relatively calm, with an average annual wind speed of 9km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is March, averaging 12km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 4km/h, making it an ideal period for wind-sensitive activities. Wind speeds vary significantly across the year, with a 8km/h difference between the calmest and windiest months. This level of variation is worth factoring into travel plans. Wind tends to pick up during the summer months. The seasonal averages are 5km/h in winter, 10km/h in spring, 9km/h in summer, 11km/h in autumn.

It is currently winter in Wollongong, which began on June 21, 2026. Wollongong is in the Southern Hemisphere, where the seasons are reversed — spring starts in September, summer in December, autumn in March, and winter in June. The warmest period peaks in December at around -10°C, while the coldest stretch bottoms out in August near -22°C. Spring is next, beginning on September 23, 2026 — 18 days from now.

The table below shows monthly climate averages for Wollongong based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.