Weather in Bangkok in September
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Compare car hire prices → Affiliate link — we earn a commission at no extra cost to youIn September, Bangkok sees average highs of 30.8°C (87.4°F) and lows of 25.1°C. Conditions are hot and extremely wet, with heavy downpours most days, with roughly 7.5 hours of sunshine a day. It is one of the best months of the year to visit. For the complete picture, see the best time to visit Bangkok — every month compared. Once you know when to go, find your Bangkok packing list at 247PackingList.
Get ready for Bangkok in September
Search flights to Bangkok
Compare 100+ airlines for September — one search, best price.
Search Flights →Lightweight travel clothing
Lightweight, breathable clothing and a compact travel umbrella are essential in this climate.
Check Price →What to pack for Bangkok in September
- Lightweight, breathable clothing
- High SPF sunscreen
- Sunglasses
- Sun hat
- Reusable water bottle
- Compact travel umbrella
- Waterproof jacket
- Quick-dry clothing
Compare all months in Bangkok
| Month | High | Rain | Rating |
|---|---|---|---|
| January | 31.7°C | 14.5mm | 10/10 |
| February | 32.3°C | 50.2mm | 10/10 |
| March | 33.3°C | 45.3mm | 10/10 |
| April | 33.5°C | 103.1mm | 9/10 |
| May | 33.5°C | 130.3mm | 9/10 |
| June | 33.0°C | 150.0mm | 9/10 |
| July | 31.9°C | 218.0mm | 8/10 |
| August | 31.6°C | 230.5mm | 8/10 |
| September | 30.8°C | 346.9mm | 8/10 |
| October | 30.3°C | 307.7mm | 8/10 |
| November | 31.0°C | 90.9mm | 10/10 |
| December | 30.8°C | 16.9mm | 10/10 |
Full month-by-month guide: best time to visit Bangkok →
For facts about Thailand — currency, language and dialling code — see our Thailand country guide at 247CountryInfo. Travellers also find it useful to keep a Bangkok travel guide to hand. Check clothing sizes in Thailand before you shop.
Frequently Asked Questions
Is September a good time to visit Bangkok?
September rates 8/10 for visiting Bangkok — good time to visit. Expect average highs of 30.8°C, 346.9mm of rain across the month and about 7.5 hours of daily sunshine.
What is the temperature in Bangkok in September?
In September, Bangkok has average highs of 30.8°C (87.4°F) and average lows of 25.1°C (77.2°F).
Does it rain in Bangkok in September?
Yes — September is one of the wetter months in Bangkok, averaging 346.9mm of rain over roughly 28 rainy days. Pack for heavy showers.
What should I wear in Bangkok in September?
For Bangkok in September (30.8°C highs / 25.1°C lows), pack lightweight, breathable clothing plus high spf sunscreen, sunglasses, sun hat.
More essentials for Bangkok in September
Packing cubes
Keep the bag organised whatever the weather — compression cubes for every size.
Check Price →Travel first aid kit
Compact TSA-friendly kit for peace of mind wherever you travel.
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Climate data sourced from Open-Meteo (open source, open data licence). Monthly averages calculated from 2020–2023 historical data. Weather can be unpredictable — always check a live forecast before travelling.