Climate Overview
The climate in Bangkok is hot. The average annual temperature is 29°C and approximately 1295mm of precipitation falls per year. September is the wettest month, receiving around 250mm of rainfall. Bangkok is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: April, May, June. The coldest months are January, December, February, when temperatures can drop to 22°C.
Temperature
Bangkok sees moderate temperature variation throughout the year, ranging from 22°C to 35°C. The warmest month is April, when average highs reach 35°C and the mean temperature sits around 31°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
Bangkok is a fairly wet location, receiving approximately 1295mm of precipitation annually, which averages out to around 108mm per month. The wettest month is September, averaging 250mm of rainfall. October and August also tend to see above-average precipitation. The driest month is December, with just 19mm. That's 231mm 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
Bangkok is mildly breezy, with an average annual wind speed of 13km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is March, averaging 15km/h, though still comfortable for most outdoor activities. The calmest conditions occur in October, with average winds dropping to 10km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 5km/h gap between the calmest and windiest months. Wind tends to pick up during the summer months. The seasonal averages are 12km/h in winter, 15km/h in spring, 14km/h in summer, 11km/h in autumn.
Seasons
90 days until Summer
It is currently spring in Bangkok, which began on March 20, 2026. Bangkok 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. Summer is next, beginning on June 21, 2026 — 90 days from now.
Spring
Temperatures range from 26 to 35°C. Precipitation is moderate at around 261mm for the season, averaging 87mm per month. Winds are generally light, averaging 15km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 27 to 34°C. Rainfall is heavy, totalling around 426mm across the season with a monthly average of 142mm. Winds are generally light, averaging 14km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 25 to 33°C. Rainfall is heavy, totalling around 546mm across the season with a monthly average of 182mm. Winds are generally light, averaging 11km/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 63mm over the season and a monthly average of 21mm. Winds are generally light, averaging 12km/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 Bangkok 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.
