Wollongong Temperature by Month

The average annual maximum temperature in Wollongong, New South Wales, Australia is 21°C (70°F), with daytime highs ranging from 17°C (63°F) in July to 25°C (77°F) in January. This page covers monthly averages, day-night differences, and how Wollongong compares to cities worldwide.

Seasonal changes in Wollongong bring a little variety without extreme temperature swings. Nighttime lows range from 19°C (66°F) in January to 10°C (50°F) in July.

The chart below illustrates the average maximum day and minimum night temperatures in Wollongong by month:

The coolest part of the day is typically between 4 AM and 6 AM, while 3 PM is usually the warmest, when solar heating is at its peak.

The chart below shows the average temperature throughout the year:

Wollongong's average annual maximum temperature is 21°C (70°F). To put that in context, here's how it compares to a few well-known destinations:

Seville, Spain averages 23°C (73°F) a year, one of the warmer cities in Western Europe, with long hot summers.

Toronto, Canada averages 13°C (55°F) annually, with cold snowy winters balanced by genuinely warm summers.

Osaka, Japan averages 22°C (72°F) annually, with hot humid summers, mild winters, and pleasant spring and autumn seasons.

Adelaide, Australia averages 21°C (70°F) a year, with warm summers, mild winters, and relatively low rainfall year-round.

Temperature alone doesn't tell the whole story, humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.

In Wollongong, July is the coolest month, with average highs of 17°C (63°F) and humidity around 53%, considered moderate. In January, the warmest month, temperatures average 25°C (77°F) with 57% humidity, conditions that feel moderate. For a full picture, see our humidity page.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

For cities and regions with significant elevation, altitude is one of the biggest factors shaping local temperatures. As a rule of thumb, temperatures fall by around 6°C for every 1,000 metres gained, so a city at 2,000 metres will typically be around 12°C cooler than a city at sea level in the same region. Higher ground also tends to see more dramatic day-to-night temperature swings, since thinner air loses heat faster after sunset.

For more on Wollongong's weather, including monthly rainfall, sunshine hours, and humidity, visit our Wollongong climate page.