Climate Overview
The climate in Belawan is hot. The average annual temperature is 28°C and approximately 2599mm of precipitation falls per year. Belawan receives a notable amount of rainfall throughout the year, including during its driest month. Belawan sits near the equator, so seasonal temperature differences are minimal throughout the year.
Temperature
Belawan has relatively stable temperatures year-round, staying within a 9°C range. The warmest month is July, when average highs reach 33°C and the mean temperature sits around 28°C. February is the coolest month, with minimum temperatures around 24°C and an average of 27°C. Daily temperature variation is modest, with an average difference of 8°C between highs and lows.
Precipitation
Belawan is a very wet location, receiving approximately 2599mm of precipitation annually, which averages out to around 217mm per month. The wettest month is November, averaging 350mm of rainfall. December and October also tend to see above-average precipitation. The driest month is July, with just 114mm. That's 236mm 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
Belawan is relatively calm, with an average annual wind speed of 8km/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 9km/h, though still comfortable for most outdoor activities. The calmest conditions occur in May, with average winds dropping to 7km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 2km/h between the calmest and windiest months.
Seasons
89 days until Summer
It is currently spring in Belawan, which began on March 20, 2026. Belawan sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in July at around 33°C, while the coldest stretch bottoms out in February near 24°C. Summer is next, beginning on June 21, 2026 — 89 days from now.
Spring
Temperatures range from 24 to 33°C. Rainfall is heavy, totalling around 594mm across the season with a monthly average of 198mm. Winds are generally light, averaging 8km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 24 to 33°C. Rainfall is heavy, totalling around 450mm across the season with a monthly average of 150mm. Winds are generally light, averaging 8km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 24 to 32°C. Rainfall is heavy, totalling around 848mm across the season with a monthly average of 283mm. Winds are generally light, averaging 8km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 24 to 32°C. Rainfall is heavy, totalling around 706mm across the season with a monthly average of 235mm. Winds are generally light, averaging 8km/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 Belawan 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.
