Bangkok Weather in September
Thailand · 30-year monthly averages
⚠️ Challenging time to visit
September in Bangkok is hot, with average daytime highs around 33°C (92°F) and nighttime lows near 25°C (78°F). Expect roughly 336mm of precipitation spread over about 18 rainy days, and heavy rainfall is common — this is peak wet season territory.
Avg high
33°C
92°F
Avg low
25°C
78°F
Rainfall
336mm
very wet
Rainy days
18
days with ≥1mm
☀️ About 130 hours of sunshine over the month (~4h/day).
🎒 What to pack
- breathable summer clothing
- sunscreen, hat and sunglasses
- refillable water bottle
- compact umbrella or rain jacket
September vs the rest of the year
FAQ
- How hot is Bangkok in September?
- September in Bangkok is hot, with average daytime highs around 33°C (92°F) and nighttime lows near 25°C (78°F). Expect roughly 336mm of precipitation spread over about 18 rainy days, and heavy rainfall is common — this is peak wet season territory.
- Does it rain a lot in Bangkok in September?
- Bangkok sees around 336mm of precipitation in September on average — very wet by global standards.
- Is September a good time to visit Bangkok?
- September is a challenging month to visit Bangkok weather-wise — plan around the conditions.