Willunga Temperature by Month

The average annual maximum temperature in Willunga, South Australia, Australia is 20°C (68°F), with daytime highs ranging from 15°C (59°F) in July to 26°C (79°F) in January. This page covers monthly averages, day-night differences, and how Willunga compares to cities worldwide.

In Willunga, temperatures can shift dramatically between warm in summer and mild in winter. Nights follow the same pattern, with lows ranging from 15°C (59°F) in January to 8°C (46°F) in July.

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

The minimum temperature is often recorded between 4 AM and 6 AM, while the highest temperature is usually reached at 3 PM, when the sun's heating effect is strongest. January, the warmest month, gets 326 hours of sunshine.

The chart below shows the average temperature throughout the year:

Willunga's average annual maximum temperature is 20°C (68°F). To put that in context, here's how it compares to a few well-known destinations:

Barcelona, Spain has an annual average of around 21°C (70°F), with warm summers and mild, fairly short winters.

On the cooler end, Oslo, Norway averages just 10°C (50°F) annually, with pleasant summers but long, cold winters.

San Francisco, USA averages 19°C (66°F) annually, but with little seasonal variation, summers are often cool and foggy, winters mild.

Melbourne, Australia averages 20°C (68°F) annually, known for unpredictable weather, with four seasons sometimes happening in one day.

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 Willunga, July is the coolest month, with average highs of 15°C (59°F) and humidity around 60%, considered high. In January, the warmest month, temperatures average 26°C (79°F) with 36% humidity, conditions that feel low. 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.

Whether a city sits on the coast or deep inland makes a significant difference to its climate. Coastal areas tend to have more stable temperatures year-round, large bodies of water absorb heat slowly in summer and release it gradually in winter, keeping extremes in check. Cities far from the sea don't benefit from that buffer, which is why continental climates tend to have hotter summers and colder winters than their coastal counterparts at the same latitude.

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