Climate Insights for Aru

The climate in Aru is warm and mild. The average annual temperature is 23°C and approximately 1450mm of precipitation falls per year. August is the wettest month, receiving around 204mm of rainfall. Aru sits near the equator, so seasonal temperature differences are minimal throughout the year.

Aru sees moderate temperature variation throughout the year, ranging from 18°C to 31°C. The warmest month is February, when average highs reach 31°C and the mean temperature sits around 26°C. August is the coolest month, with minimum temperatures around 18°C and an average of 21°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs.

Aru is a fairly wet location, receiving approximately 1450mm of precipitation annually, which averages out to around 121mm per month. The wettest month is August, averaging 204mm of rainfall. September and October also tend to see above-average precipitation. The driest month is January, with just 6mm. That's 198mm less than August, 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.

Aru is relatively calm, with an average annual wind speed of 12km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is March, averaging 14km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, with average winds dropping to 9km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 5km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 13km/h in winter, 13km/h in spring, 9km/h in summer, 11km/h in autumn.

It is currently spring in Aru, which began on March 20, 2026. Aru sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in February at around 31°C, while the coldest stretch bottoms out in August near 18°C. Summer is next, beginning on June 21, 2026 — 89 days from now.

The best time to visit Aru is during January and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 24°C with modest rainfall averaging 16mm per month. By contrast, February can be uncomfortably hot with highs reaching 31°C, while August is the coldest period with lows dropping to 18°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Aru 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.