Bangkok Weather

Like most of Thailand, Bangkok has a tropical savanna climate in December to an average high of 35.4 °C (95.7 °F) in April. The rainy season begins with the arrival of the southwest monsoon around mid-May. September is the wettest month, with an average rainfall of 334.3 millimetres (13.16 in). The rainy season lasts until October, when the dry and cool northeast monsoon takes over until February. The hot season is generally dry, but also sees occasional summer storms. The surface magnitude of Bangkok’s urban heat island has been measured at 2.5 °C (4.5 °F) during the day and 8.0 °C (14 °F) at night. The highest recorded temperature of Bangkok metropolis was 40.1 °C (104.2 °F) in March 2013, and the lowest recorded temperature was 9.9 °C (49.8 °F) in January 1955.

The Climate Impact Group at NASA’s Goddard Institute for Space Studies projected severe weather impacts on Bangkok caused by climate change. It found that Bangkok in 1960 had 193 days at or above 32 °C. In 2018, Bangkok can expect 276 days at or above 32 °C. The group forecasts a rise by 2100 to, on average, 297 to 344 days at or above 32 °C.

Average Temperature
Jan
90 °F
32 °C
Feb
92 °F
34 °C
Mar
94 °F
35 °C
Apr
96 °F
36 °C
May
94 °F
35 °C
Jun
93 °F
34 °C
Jul
91 °F
33 °C
Aug
89 °F
32 °C
Sep
91 °F
33 °C
Oct
91 °F
33 °C
Nov
90 °F
32 °C
Dec
90 °F
32 °C
Humidity
Jan
61%
Feb
60%
Mar
67%
Apr
65%
May
62%
Jun
63%
Jul
69%
Aug
76%
Sep
76%
Oct
76%
Nov
64%
Dec
59%
Rain
Jan
13mm
Feb
7mm
Mar
28mm
Apr
54mm
May
190mm
Jun
188mm
Jul
138mm
Aug
182mm
Sep
262mm
Oct
257mm
Nov
23mm
Dec
23mm
Clouds
Jan
46%
Feb
14%
Mar
26%
Apr
55%
May
88%
Jun
92%
Jul
97%
Aug
97%
Sep
88%
Oct
78%
Nov
57%
Dec
31%
Air quality US AQI
Jan
126
Feb
84
Mar
91
Apr
74
May
73
Jun
50
Jul
54
Aug
48
Sep
55
Oct
70
Nov
90
Dec
109
Sun
Jan
8UVI
Feb
10UVI
Mar
10UVI
Apr
10UVI
May
6UVI
Jun
6UVI
Jul
6UVI
Aug
5UVI
Sep
7UVI
Oct
7UVI
Nov
8UVI
Dec
8UVI