Climate Overview
The climate in Chachoengsao is hot. The average annual temperature is 29°C and approximately 1522mm of precipitation falls per year. September is the wettest month, receiving around 273mm of rainfall. Chachoengsao 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, January, February, when temperatures can drop to 22°C.
Temperature
Chachoengsao sees moderate temperature variation throughout the year, ranging from 22°C to 35°C. April is the hottest month, with daytime highs reaching 35°C and an average of 30°C. December is the coolest month, with minimum temperatures around 22°C and an average of 27°C. Daily temperature variation is modest, with an average difference of 8°C between highs and lows.
Precipitation
Chachoengsao is a fairly wet location, receiving approximately 1522mm of precipitation annually, which averages out to around 127mm per month. The wettest month is September, averaging 273mm of rainfall. October and July also tend to see above-average precipitation. The driest month is February, with just 17mm. That's 256mm less than September, 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
Chachoengsao 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 Chachoengsao, which began on June 21, 2026. Chachoengsao 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 35°C, while the coldest stretch bottoms out in December near 22°C. Autumn is next, beginning on September 23, 2026 — 91 days from now.
Spring
Temperatures range from 25 to 35°C. Rainfall is heavy, totalling around 336mm across the season with a monthly average of 112mm. 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 33°C. Rainfall is heavy, totalling around 588mm across the season with a monthly average of 196mm. Winds are generally light, averaging 2km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 24 to 33°C. Rainfall is heavy, totalling around 528mm across the season with a monthly average of 176mm. Winds are generally light, averaging 2km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 22 to 34°C. Rainfall is relatively light, with around 69mm over the season and a monthly average of 23mm. 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 Chachoengsao 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.
