Climate Overview
The climate in Chanthaburi is hot. The average annual temperature is 28°C and approximately 2812mm of precipitation falls per year. August is the wettest month, receiving around 508mm of rainfall. Chanthaburi is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: April, March, May. The coldest months are December, February, January, when temperatures can drop to 23°C.
Temperature
Chanthaburi has relatively stable temperatures year-round, staying within a 9°C range. The warmest month is April, when average highs reach 32°C and the mean temperature sits around 29°C. December is the coolest month, with minimum temperatures around 23°C and an average of 27°C. Daily temperature variation is modest, with an average difference of 6°C between highs and lows.
Precipitation
Chanthaburi is a very wet location, receiving approximately 2812mm of precipitation annually, which averages out to around 234mm per month. The wettest month is August, averaging 508mm of rainfall. July and September also tend to see above-average precipitation. The driest month is December, with just 27mm. That's 481mm less than August, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.
Wind
Chanthaburi is relatively calm, with an average annual wind speed of 2km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is December, averaging 3km/h, though still comfortable for most outdoor activities. The calmest conditions occur in October, with average winds dropping to 2km/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 Chanthaburi, which began on June 21, 2026. Chanthaburi is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in April at around 32°C, while the coldest stretch bottoms out in December near 23°C. Autumn is next, beginning on September 23, 2026 — 91 days from now.
Spring
Temperatures range from 25 to 32°C. Rainfall is heavy, totalling around 473mm across the season with a monthly average of 158mm. Winds are generally light, averaging 2km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 26 to 30°C. Rainfall is heavy, totalling around 1433mm across the season with a monthly average of 478mm. Winds are generally light, averaging 3km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 24 to 31°C. Rainfall is heavy, totalling around 797mm across the season with a monthly average of 266mm. Winds are generally light, averaging 2km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 23 to 31°C. Rainfall is relatively light, with around 109mm over the season and a monthly average of 36mm. 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 Chanthaburi 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.
