Climate Overview
The climate in Bireun is hot. The average annual temperature is 28°C and approximately 2473mm of precipitation falls per year. Bireun receives a notable amount of rainfall throughout the year, including during its driest month. Bireun sits near the equator, so seasonal temperature differences are minimal throughout the year.
Temperature
Bireun has relatively stable temperatures year-round, staying within a 6°C range. The warmest month is May, when average highs reach 31°C and the mean temperature sits around 28°C. January is the coolest month, with minimum temperatures around 25°C and an average of 27°C. Daily temperature variation is modest, with an average difference of 5°C between highs and lows.
Precipitation
Bireun is a very wet location, receiving approximately 2473mm of precipitation annually, which averages out to around 206mm per month. The wettest month is November, averaging 394mm of rainfall. December and October also tend to see above-average precipitation. The driest month is June, with just 118mm. That's 276mm less than November, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall.
Wind
Bireun is relatively calm, with an average annual wind speed of 10km/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 13km/h, though still comfortable for most outdoor activities. The calmest conditions occur in June, 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 4km/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 12km/h in winter, 10km/h in spring, 9km/h in summer, 10km/h in autumn.
Seasons
89 days until Summer
It is currently spring in Bireun, which began on March 20, 2026. Bireun sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in May at around 31°C, while the coldest stretch bottoms out in January near 25°C. Summer is next, beginning on June 21, 2026 — 89 days from now.
Spring
Temperatures range from 25 to 31°C. Rainfall is heavy, totalling around 524mm across the season with a monthly average of 175mm. Winds are generally light, averaging 10km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 26 to 31°C. Rainfall is heavy, totalling around 436mm across the season with a monthly average of 145mm. Winds are generally light, averaging 9km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 25 to 30°C. Rainfall is heavy, totalling around 878mm across the season with a monthly average of 293mm. Winds are generally light, averaging 10km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 25 to 30°C. Rainfall is heavy, totalling around 636mm across the season with a monthly average of 212mm. Winds are generally light, averaging 12km/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 Bireun 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.
