Climate Insights for Sydney International Airport

The climate in Sydney International Airport is warm and mild. The average annual temperature is 18°C and approximately 1047mm of precipitation falls per year. Sydney International Airport receives a notable amount of rainfall throughout the year, including during its driest month. Sydney International Airport 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, March. The coldest months are July, August, June, when temperatures can drop to 12°C.

Sydney International Airport sees moderate temperature variation throughout the year, ranging from 12°C to 24°C. January is the warmest month, though highs remain moderate at 24°C with a mean of 22°C. July is the coolest month, with minimum temperatures around 12°C and an average of 14°C. Daily temperature variation is modest, with an average difference of 3°C between highs and lows. The sharpest temperature change occurs between April and May, with a 3°C shift in average temperatures.

Sydney International Airport is a moderately rainy area, receiving approximately 1047mm of precipitation annually, which averages out to around 87mm per month. The wettest month is March, averaging 151mm of rainfall. February and April also tend to see above-average precipitation. The driest month is September, with just 55mm. That's 96mm less than March, the wettest month. Precipitation varies noticeably between seasons, with the first half (January to June) of the year generally seeing more rainfall.

Sydney International Airport is moderately windy, with an average annual wind speed of 27km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is October, averaging 28km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in April, with average winds dropping to 24km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 4km/h between the calmest and windiest months.

It is currently autumn in Sydney International Airport, which began on March 20, 2026. Sydney International Airport 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 24°C, while the coldest stretch bottoms out in July near 12°C. Winter is next, beginning on June 21, 2026 — 88 days from now.

The best time to visit Sydney International Airport is during January, May, September, October, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 73mm per month. By contrast, July can be quite cold with temperatures dropping to 12°C. Despite being the best months overall, some rain is still likely — pack a waterproof layer and plan a mix of indoor and outdoor activities.

The table below shows monthly climate averages for Sydney International Airport 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.