Climate Insights for Aileu

The climate in Aileu is warm and mild. The average annual temperature is 23°C and approximately 1787mm of precipitation falls per year. March is the wettest month, receiving around 320mm of rainfall. Aileu sits near the equator, so seasonal temperature differences are minimal throughout the year.

Aileu sees moderate temperature variation throughout the year, ranging from 17°C to 30°C. The warmest month is October, when average highs reach 30°C and the mean temperature sits around 24°C. August is the coolest month, with minimum temperatures around 17°C and an average of 21°C. Daily temperature variation is modest, with an average difference of 8°C between highs and lows.

Aileu is a fairly wet location, receiving approximately 1787mm of precipitation annually, which averages out to around 149mm per month. The wettest month is March, averaging 320mm of rainfall. February and December also tend to see above-average precipitation. The driest month is August, with just 17mm. That's 304mm less than March, 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.

Aileu is relatively calm, with an average annual wind speed of 9km/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 12km/h, though still comfortable for most outdoor activities. The calmest conditions occur in March, with average winds dropping to 6km/h, making it an ideal period for wind-sensitive activities. Wind speeds vary significantly across the year, with a 6km/h difference between the calmest and windiest months. This level of variation is worth factoring into travel plans. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 11km/h in winter, 10km/h in spring, 7km/h in summer, 8km/h in autumn.

It is currently autumn in Aileu, which began on March 20, 2026. Aileu sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in October at around 30°C, while the coldest stretch bottoms out in August near 17°C. Winter is next, beginning on June 21, 2026 — 90 days from now.

The best time to visit Aileu is during May, June, July, August, September and October, when the weather is most comfortable for travellers. During these months, average temperatures hover around 22°C with modest rainfall averaging 53mm per month. 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 Aileu 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.