Climate Overview
The climate in Aileu is hot. The average annual temperature is 26°C and approximately 1506mm of precipitation falls per year. March is the wettest month, receiving around 312mm of rainfall. Aileu sits near the equator, so seasonal temperature differences are minimal throughout the year.
Temperature
Aileu has relatively stable temperatures year-round, staying within a 9°C range. The warmest month is October, when average highs reach 30°C and the mean temperature sits around 26°C. August is the coolest month, with minimum temperatures around 21°C and an average of 25°C. Daily temperature variation is modest, with an average difference of 6°C between highs and lows.
Precipitation
Aileu is a fairly wet location, receiving approximately 1506mm of precipitation annually, which averages out to around 126mm per month. The wettest month is March, averaging 312mm of rainfall. January and December also tend to see above-average precipitation. The driest month is August, with just 6mm. That's 306mm 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.
Wind
Aileu is relatively calm, with an average annual wind speed of 2km/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 3km/h, though still comfortable for most outdoor activities. The calmest conditions occur in November, with average winds dropping to 1km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 2km/h gap between the calmest and windiest months.
Seasons
93 days until Spring
It is currently winter in Aileu, which began on June 21, 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 21°C. Spring is next, beginning on September 23, 2026 — 93 days from now.
Spring
Temperatures range from 22 to 30°C. Precipitation is moderate at around 265mm for the season, averaging 88mm per month. Winds are generally light, averaging 2km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 24 to 29°C. Rainfall is heavy, totalling around 686mm across the season with a monthly average of 229mm. Winds are generally light, averaging 2km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 24 to 29°C. Rainfall is heavy, totalling around 508mm across the season with a monthly average of 169mm. Winds are generally light, averaging 2km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 21 to 29°C. Rainfall is relatively light, with around 48mm over the season and a monthly average of 16mm. Winds are generally light, averaging 3km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Best Time to Visit
The best time to visit Aileu is during July and August, when the weather is most comfortable for travellers. During these months, average temperatures hover around 25°C with modest rainfall averaging 12mm per month. By contrast, October can be uncomfortably hot with temperatures reaching 30°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.
Monthly Climate Data
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.
