September · Vietnam
Best time to visit Hoi An in September Weather, crowds & prices
Weather in Hoi An in September
Average temperature 28°C, 368 mm of rain, about 25 days with 6+ hours of sunshine and 84% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
3.0/10
Ranked #12 of 12 months
- Avg temp
- 28°C
- Rainfall
- 368 mm
- Humidity
- 84%
- Days with 6h+ sun
- 25
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $ · Budget Friendly ($)
September in Hoi An scores 3.0/10 for sightseeing and cultural travel - ranked #12 of 12. Expect around 28°C, 368 mm of rain, and roughly 25 days with 6+ hours of sunshine this month.
Hoi An's Ancient Town is a trading port preserved in timber-framed houses, assembly halls, and the Japanese Covered Bridge over the Thu Bon River.
September in Hoi An — the hardest end of the year
September averages 28°C (82°F) and humidity near 84%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
368 mm makes this the wettest stretch of the year, though about 25 days with 6+ hours of sunshine still appear — keep an indoor fallback ready.
It scores 3/10 here, 12th of 12 months, against 7.6/10 in the destination's best month.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
Plan for low-season pricing, with crowds are light for this destination.
Flexible dates? February scores 4.6 points higher here — enough to change the trip.
Frequently asked
- What is the weather like in Hoi An in September?
- In September, Hoi An averages 28°C, 368 mm of rain, and about 25 days with 6+ hours of sunshine. Its climate-comfort score is 3.0/10.
- Is September a good time to visit Hoi An?
- September earns a 3.0/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Hoi An in September?
- Expect about 368 mm of rain in September. Average humidity is 84% and there are about 25 days with 6+ hours of sunshine.
Curated in Hoi An
Tickets & experiences
Things to do in Hoi An
Hoi An, Vietnam. Live activities and tours from GetYourGuide, matched to this destination.