Thailand (Bangkok) · September
Low seasonThailand · Asia
Climate Overview
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Ø day, range from coolest to warmest dayØ dayrange | 32° (90°)27– (81–)35 (95) | 34° (93°)29– (84–)36 (97) | 35° (95°)30– (86–)37 (99) | 36° (97°)31– (88–)38 (100) | 35° (95°)30– (86–)37 (99) | 34° (93°)30– (86–)36 (97) | 34° (93°)30– (86–)35 (95) | 34° (93°)30– (86–)36 (97) | 33° (91°)29– (84–)35 (95) | 33° (91°)29– (84–)35 (95) | 33° (91°)29– (84–)35 (95) | 32° (90°)27– (81–)35 (95) |
Ø night, range from coldest to warmest nightØ nightrange | 24° (75°)19– (66–)26 (79) | 25° (77°)21– (70–)27 (81) | 27° (81°)23– (73–)28 (82) | 28° (82°)24– (75–)30 (86) | 28° (82°)24– (75–)30 (86) | 27° (81°)24– (75–)29 (84) | 27° (81°)24– (75–)28 (82) | 27° (81°)24– (75–)28 (82) | 26° (79°)24– (75–)28 (82) | 26° (79°)23– (73–)27 (81) | 26° (79°)22– (72–)27 (81) | 24° (75°)19– (66–)27 (81) |
☀️Sunshine | 4h | 5h | 5h | 5h | 4h | 4h | 3h | 3h | 3h | 4h | 4h | 4h |
🌧Rain Days | 2d28mm (1.1") | 2d22mm (0.9") | 3d47mm (1.8") | 6d100mm (3.9") | 12d223mm (8.8") | 13d198mm (7.8") | 14d213mm (8.4") | 16d219mm (8.6") | 19d344mm (13.6") | 15d290mm (11.4") | 5d61mm (2.4") | 1d15mm (0.6") |
Best travel time current monthØ = average · small figures = range: coolest–warmest day / coldest–warmest nightClimate data 2005–2025 · Source: ERA5 + station data
Off-season — lowest travel prices with still acceptable climate.
September in Thailand (Bangkok) offers acceptable conditions — but it's not among the top travel months. Those looking for ideal weather should visit in January, February, March, November, and December.
Daytime highs reach 33°C (91°F) with a daily average of 29°C (84°F) — nights stay warm at 26°C (79°F). Peaks reach around 35°C (95°F), the coldest nights around 24°C (75°F). With 3 sunshine hours per day and 19 rain days (344 mm (13.5 in)), this is one of the cloudier months.
An umbrella or waterproof jacket is essential. On rainy days, plan indoor activities like museums and markets.
Monsoon season: rain every day, mostly in the afternoon, and the heat stays anyway. Thanks to the Skytrain and air-conditioned markets, Bangkok works well in the rain — prices at their lowest of the year, Chatuchak weekend market less crowded.
Packing list for Thailand (Bangkok) in September
- Light summer clothes
- Rain jacket and waterproof shoes
- Insect repellent
- Travel first-aid kit
Frequently Asked Questions
- Is September a good time to visit Thailand (Bangkok)?
- September is not an optimal month for Thailand (Bangkok) (Score: 49/100), but it is manageable. For better conditions, consider January, February, March, November, and December.
- How warm is it in Thailand (Bangkok) in September?
- In September, Thailand (Bangkok) sees daily highs of 33°C (91°F). Nights cool to 26°C (79°F), with a daily average of 29°C (84°F). Peaks reach around 35°C (95°F), the coldest nights around 24°C (75°F).
- How much rain falls in Thailand (Bangkok) in September?
- In September, Thailand (Bangkok) receives an average of 344 mm (13.5 in) of rain over 19 rain days. With frequent rain days, waterproof clothing is recommended.
- How many sunshine hours does Thailand (Bangkok) get in September?
- Thailand (Bangkok) averages 3 sunshine hours per day in September — below the annual average.
