Climate Overview
The climate in Alas Leuser Airport is warm and mild. The average annual temperature is 22°C and approximately 4160mm of precipitation falls per year. Alas Leuser Airport receives a notable amount of rainfall throughout the year, including during its driest month. Alas Leuser Airport sits near the equator, so seasonal temperature differences are minimal throughout the year.
Temperature
Alas Leuser Airport has relatively stable temperatures year-round, staying within a 10°C range. The warmest month is April, when average highs reach 27°C and the mean temperature sits around 22°C. February is the coolest month, with minimum temperatures around 17°C and an average of 22°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs.
Precipitation
Alas Leuser Airport is a very wet location, receiving approximately 4160mm of precipitation annually, which averages out to around 347mm per month. The wettest month is December, averaging 484mm of rainfall. November and September also tend to see above-average precipitation. The driest month is February, with just 180mm. That's 304mm less than December, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall.
Wind
Alas Leuser Airport is relatively calm, with an average annual wind speed of 1km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 1km/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. Wind conditions are fairly consistent throughout the year, varying by only 0km/h between the calmest and windiest months.
Seasons
88 days until Autumn
It is currently summer in Alas Leuser Airport, which began on June 21, 2026. Alas Leuser Airport sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in April at around 27°C, while the coldest stretch bottoms out in February near 17°C. Autumn is next, beginning on September 23, 2026 — 88 days from now.
Spring
Temperatures range from 18 to 27°C. Rainfall is heavy, totalling around 982mm across the season with a monthly average of 327mm. Winds are generally light, averaging 1km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 18 to 27°C. Rainfall is heavy, totalling around 946mm across the season with a monthly average of 315mm. Winds are generally light, averaging 1km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 18 to 26°C. Rainfall is heavy, totalling around 1300mm across the season with a monthly average of 433mm. Winds are generally light, averaging 1km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 17 to 26°C. Rainfall is heavy, totalling around 932mm across the season with a monthly average of 311mm. Winds are generally light, averaging 1km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Monthly Climate Data
The table below shows monthly climate averages for Alas Leuser 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.
