Climate Overview
The climate in Biaru is warm and mild. The average annual temperature is 21°C and approximately 7183mm of precipitation falls per year. Biaru receives a notable amount of rainfall throughout the year, including during its driest month. Biaru sits near the equator, so seasonal temperature differences are minimal throughout the year.
Temperature
Biaru has relatively stable temperatures year-round, staying within a 9°C range. The warmest month is December, when average highs reach 26°C and the mean temperature sits around 22°C. July is the coolest month, with minimum temperatures around 17°C and an average of 20°C. Daily temperature variation is modest, with an average difference of 7°C between highs and lows.
Precipitation
Biaru is a very wet location, receiving approximately 7183mm of precipitation annually, which averages out to around 599mm per month. The wettest month is September, averaging 857mm of rainfall. August and October also tend to see above-average precipitation. The driest month is February, with just 319mm. That's 538mm less than September, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall.
Wind
Biaru 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 April, 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
93 days until Spring
It is currently winter in Biaru, which began on June 21, 2026. Biaru sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in December at around 26°C, while the coldest stretch bottoms out in July near 17°C. Spring is next, beginning on September 23, 2026 — 93 days from now.
Spring
Temperatures range from 18 to 26°C. Rainfall is heavy, totalling around 2042mm across the season with a monthly average of 681mm. Winds are generally light, averaging 1km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 19 to 26°C. Rainfall is heavy, totalling around 1188mm across the season with a monthly average of 396mm. 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 1943mm across the season with a monthly average of 648mm. 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 25°C. Rainfall is heavy, totalling around 2011mm across the season with a monthly average of 670mm. 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 Biaru 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.
