Climate Overview
The climate in Tomohon is hot. The average annual temperature is 25°C and approximately 3649mm of precipitation falls per year. Tomohon receives a notable amount of rainfall throughout the year, including during its driest month. Tomohon sits near the equator, so seasonal temperature differences are minimal throughout the year.
Temperature
Tomohon has relatively stable temperatures year-round, staying within a 8°C range. The warmest month is October, when average highs reach 30°C and the mean temperature sits around 25°C. September is the coolest month, with minimum temperatures around 22°C and an average of 25°C. Daily temperature variation is modest, with an average difference of 7°C between highs and lows.
Precipitation
Tomohon is a very wet location, receiving approximately 3649mm of precipitation annually, which averages out to around 304mm per month. The wettest month is June, averaging 388mm of rainfall. May and November also tend to see above-average precipitation. The driest month is August, with just 206mm. That's 182mm less than June, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around.
Wind
Tomohon 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 February, averaging 10km/h, though still comfortable for most outdoor activities. The calmest conditions occur in November, with average winds dropping to 6km/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.
Seasons
89 days until Summer
It is currently spring in Tomohon, which began on March 20, 2026. Tomohon sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in October at around 30°C, while the coldest stretch bottoms out in September near 22°C. Summer is next, beginning on June 21, 2026 — 89 days from now.
Spring
Temperatures range from 22 to 30°C. Rainfall is heavy, totalling around 973mm across the season with a monthly average of 324mm. Winds are generally light, averaging 7km/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 893mm across the season with a monthly average of 298mm. Winds are generally light, averaging 8km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 22 to 30°C. Rainfall is heavy, totalling around 875mm across the season with a monthly average of 292mm. Winds are generally light, averaging 7km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 22 to 29°C. Rainfall is heavy, totalling around 908mm across the season with a monthly average of 303mm. Winds are generally light, averaging 9km/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 Tomohon 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.
