Climate Overview
The climate in Chachoengsao is hot. The average annual temperature is 29°C and approximately 1536mm of precipitation falls per year. September is the wettest month, receiving around 297mm 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 January, December, 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. January 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 1536mm of precipitation annually, which averages out to around 128mm per month. The wettest month is September, averaging 297mm of rainfall. July and August also tend to see above-average precipitation. The driest month is December, with just 16mm. That's 282mm 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 8km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is July, averaging 9km/h, though still comfortable for most outdoor activities. The calmest conditions occur in October, 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 3km/h gap between the calmest and windiest months.
Seasons
87 days until Winter
It is currently autumn in Chachoengsao, which began on September 23, 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 January near 22°C. Winter is next, beginning on December 21, 2026 (87 days from now).
Spring
Temperatures range from 25 to 35°C. Rainfall is heavy, totalling around 349mm across the season with a monthly average of 116mm. Winds are generally light, averaging 8km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 26 to 34°C. Rainfall is heavy, totalling around 575mm across the season with a monthly average of 192mm. Winds are generally light, averaging 9km/h. Light, breathable clothing is ideal. Perfect conditions for outdoor activities.
Autumn
Temperatures range from 24 to 32°C. Rainfall is heavy, totalling around 548mm across the season with a monthly average of 183mm. 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 33°C. Rainfall is relatively light, with around 64mm over the season and a monthly average of 21mm. Winds are generally light, averaging 8km/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.
