Climate Overview
The climate in Sibu is hot. The average annual temperature is 27°C and approximately 3338mm of precipitation falls per year. Sibu receives a notable amount of rainfall throughout the year, including during its driest month. Sibu sits near the equator, so seasonal temperature differences are minimal throughout the year.
Temperature
Sibu has relatively stable temperatures year-round, staying within a 8°C range. The warmest month is August, when average highs reach 32°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 7°C between highs and lows.
Precipitation
Sibu is a very wet location, receiving approximately 3338mm of precipitation annually, which averages out to around 278mm per month. The wettest month is December, averaging 397mm of rainfall. November and September also tend to see above-average precipitation. The driest month is August, with just 156mm. That's 241mm 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
Sibu 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 2km/h, though still comfortable for most outdoor activities. The calmest conditions occur in May, with average winds dropping to 1km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 1km/h gap between the calmest and windiest months.
Seasons
91 days until Autumn
It is currently summer in Sibu, which began on June 21, 2026. Sibu sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in August at around 32°C, while the coldest stretch bottoms out in February near 24°C. Autumn is next, beginning on September 23, 2026 — 91 days from now.
Spring
Temperatures range from 24 to 32°C. Rainfall is heavy, totalling around 789mm across the season with a monthly average of 263mm. Winds are generally light, averaging 1km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 25 to 32°C. Rainfall is heavy, totalling around 632mm across the season with a monthly average of 211mm. Winds are generally light, averaging 1km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 24 to 31°C. Rainfall is heavy, totalling around 973mm across the season with a monthly average of 324mm. Winds are generally light, averaging 1km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 24 to 30°C. Rainfall is heavy, totalling around 944mm across the season with a monthly average of 315mm. Winds are generally light, averaging 2km/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 Sibu 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.
