The weather in Thailand is dominated by a tropical monsoon climate. This means the country has three main seasons: hot season from March to June, rainy season from July to October and cool season between November and February. As Bangkok holds claim to being the hottest city in the world, expect daytime temperatures to be in excess of 30 degrees centigrade throughout the year. The possible exception to this is in late December and early January. Bangkok weather may not be the warmest in the world every day but, overall, it is unrelenting simply because it doesn’t cool at night.
The two periods – April to May and September to October – are the most humid. The southwest monsoons arrive between May and October bringing unsettled, cloudy conditions. For many people, this is a welcome respite.
ANNUAL WEATHER AVERAGES BANGKOK
January Climate & Weather Averages in Bangkok
High Temp: 33 °C
Low Temp: 23 °C
Mean Temp: 28 °C
Precipitation: 27.0 mm
Humidity: 64%
Dew Point: 20 °C
Wind: 2 mph
Pressure: 1013 mbar
Visibility: 9 km
February Climate & Weather Averages in Bangkok
High Temp: 34 °C
Low Temp: 25 °C
Mean Temp: 30 °C
Precipitation: 30.9 mm
Humidity: 70%
Dew Point: 23 °C
Wind: 2 mph
Pressure: 1011 mbar
Visibility: 9 km
March Climate & Weather Averages in Bangkok
High Temp: 35 °C
Low Temp: 26 °C
Mean Temp: 31 °C
Precipitation: 49.3 mm
Humidity: 71%
Dew Point: 24 °C
Wind: 3 mph
Pressure: 1010 mbar
Visibility: 10 km
April Climate & Weather Averages in Bangkok
High Temp: 36 °C
Low Temp: 27 °C
Mean Temp: 32 °C
Precipitation: 86.5 mm
Humidity: 70%
Dew Point: 25 °C
Wind: 3 mph
Pressure: 1009 mbar
Visibility: 10 km
May Climate & Weather Averages in Bangkok
High Temp: 35 °C
Low Temp: 27 °C
Mean Temp: 31 °C
Precipitation: 202.4 mm
Humidity: 73%
Dew Point: 25 °C
Wind: 2 mph
Pressure: 1007 mbar
Visibility: 10 km
June Climate & Weather Averages in Bangkok
High Temp: 34 °C
Low Temp: 26 °C
Mean Temp: 30 °C
Precipitation: 185.4 mm
Humidity: 75%
Dew Point: 25 °C
Wind: 2 mph
Pressure: 1007 mbar
Visibility: 10 km
July Climate & Weather Averages in Bangkok
High Temp: 34 °C
Low Temp: 26 °C
Mean Temp: 30 °C
Precipitation: 220.7 mm
Humidity: 76%
Dew Point: 24 °C
Wind: 2 mph
Pressure: 1007 mbar
Visibility: 10 km
August Climate & Weather Averages in Bangkok
High Temp: 34 °C
Low Temp: 26 °C
Mean Temp: 30 °C
Precipitation: 185.4 mm
Humidity: 76%
Dew Point: 24 °C
Wind: 2 mph
Pressure: 1007 mbar
Visibility: 10 km
September Climate & Weather Averages in Bangkok
High Temp: 34 °C
Low Temp: 25 °C
Mean Temp: 29 °C
Precipitation: 311.3 mm
Humidity: 79%
Dew Point: 25 °C
Wind: 2 mph
Pressure: 1008 mbar
Visibility: 10 km
October Climate & Weather Averages in Bangkok
High Temp: 33 °C
Low Temp: 25 °C
Mean Temp: 29 °C
Precipitation: 250.1 mm
Humidity: 78%
Dew Point: 24 °C
Wind: 1 mph
Pressure: 1010 mbar
Visibility: 9 km
November Climate & Weather Averages in Bangkok
High Temp: 34 °C
Low Temp: 25 °C
Mean Temp: 29 °C
Precipitation: 48.8 mm
Humidity: 69%
Dew Point: 22 °C
Wind: 2 mph
Pressure: 1011 mbar
Visibility: 9 km
December Climate & Weather Averages in Bangkok
High Temp: 33 °C
Low Temp: 23 °C
Mean Temp: 28 °C
Precipitation: 14.0 mm
Humidity: 64%
Dew Point: 20 °C
Wind: 2 mph
Pressure: 1012 mba
Visibility: 9 km