Climate Overview
The climate in Mamuju is warm and mild. The average annual temperature is 24°C and approximately 4393mm of precipitation falls per year. Mamuju receives a notable amount of rainfall throughout the year, including during its driest month. Mamuju sits near the equator, so seasonal temperature differences are minimal throughout the year.
Temperature
Mamuju has relatively stable temperatures year-round, staying within a 8°C range. The warmest month is May, when average highs reach 29°C and the mean temperature sits around 25°C. September is the coolest month, with minimum temperatures around 21°C and an average of 24°C. Daily temperature variation is modest, with an average difference of 7°C between highs and lows.
Precipitation
Mamuju is a very wet location, receiving approximately 4393mm of precipitation annually, which averages out to around 366mm per month. The wettest month is April, averaging 460mm of rainfall. May and June also tend to see above-average precipitation. The driest month is August, with just 280mm. That's 180mm less than April, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around.
Wind
Mamuju 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 January, averaging 1km/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 0km/h gap between the calmest and windiest months.
Seasons
90 days until Spring
It is currently winter in Mamuju, which began on June 21, 2026. Mamuju 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 29°C, while the coldest stretch bottoms out in September near 21°C. Spring is next, beginning on September 23, 2026 — 90 days from now.
Spring
Temperatures range from 21 to 29°C. Rainfall is heavy, totalling around 1205mm across the season with a monthly average of 402mm. Winds are generally light, averaging 1km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 22 to 29°C. Rainfall is heavy, totalling around 925mm across the season with a monthly average of 308mm. Winds are generally light, averaging 1km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 22 to 29°C. Rainfall is heavy, totalling around 1208mm across the season with a monthly average of 403mm. Winds are generally light, averaging 1km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 21 to 29°C. Rainfall is heavy, totalling around 1055mm across the season with a monthly average of 352mm. 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 Mamuju 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.
