Climate Insights for Wellington International Airport

The climate in Wellington International Airport is temperate. The average annual temperature is 13°C and approximately 932mm of precipitation falls per year. Wellington International Airport receives a notable amount of rainfall throughout the year, including during its driest month. Wellington 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: February, January, March. The coldest months are August, July, September, when temperatures can drop to 9°C.

Wellington International Airport has relatively stable temperatures year-round, staying within a 9°C range. February is the warmest month, though highs remain moderate at 18°C with a mean of 17°C. August is the coolest month, with minimum temperatures around 9°C and an average of 10°C. Daily temperature variation is modest, with an average difference of 2°C between highs and lows.

Wellington International Airport is a moderately rainy area, receiving approximately 932mm of precipitation annually, which averages out to around 78mm per month. The wettest month is July, averaging 108mm of rainfall. August and September also tend to see above-average precipitation. The driest month is January, with just 47mm. That's 61mm less than July, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around.

Wellington International Airport is very windy, with an average annual wind speed of 36km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is September, averaging 39km/h, which can feel quite blustery and may affect outdoor activities. The calmest conditions occur in March, with average winds dropping to 34km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 5km/h between the calmest and windiest months.

It is currently autumn in Wellington International Airport, which began on March 20, 2026. Wellington 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 February at around 18°C, while the coldest stretch bottoms out in August near 9°C. Winter is next, beginning on June 21, 2026 — 89 days from now.

The best time to visit Wellington International Airport is during January, February, March and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 16°C with modest rainfall averaging 66mm per month. By contrast, August can be quite cold with temperatures dropping to 9°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Wellington 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.