Climate Insights for Willunga

The climate in Willunga is temperate. The average annual temperature is 15°C and approximately 463mm of precipitation falls per year. August is the wettest month, receiving around 67mm of rainfall. Willunga 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: January, February, December. The coldest months are July, August, June, when temperatures can drop to 7°C.

Willunga sees moderate temperature variation throughout the year, ranging from 7°C to 27°C. The warmest month is January, when average highs reach 27°C and the mean temperature sits around 20°C. July is the coolest month, with minimum temperatures around 7°C and an average of 10°C. On average, daily temperatures fluctuate by about 10°C between overnight lows and afternoon highs. The sharpest temperature change occurs between April and May, with a 3°C shift in average temperatures.

Willunga is a relatively dry area, receiving approximately 463mm of precipitation annually, which averages out to around 39mm per month. The wettest month is August, averaging 67mm of rainfall. July and June also tend to see above-average precipitation. The driest month is March, with just 13mm. That's 54mm less than August, 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.

Willunga is mildly breezy, with an average annual wind speed of 19km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is July, averaging 20km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in April, with average winds dropping to 17km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 3km/h between the calmest and windiest months.

It is currently autumn in Willunga, which began on March 20, 2026. Willunga 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 January at around 27°C, while the coldest stretch bottoms out in July near 7°C. Winter is next, beginning on June 21, 2026 — 88 days from now.

The best time to visit Willunga is during January, February, March, April, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 18°C with modest rainfall averaging 24mm per month. By contrast, July can be quite cold with temperatures dropping to 7°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Willunga 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. 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.