Middle of the wetter season · Weather & things to do
Hoi An in September
Hoi An edges cooler than August, with highs of 87°F (31°C), lows of 78°F (26°C) and about 14.6 in (371 mm) of rain.
With a comfort score of 35/100 (12th of 12), it's one of the toughest months, held back mainly by rain.
- Avg high
- 87°F (31°C)
- Avg low
- 78°F (26°C)
- Rain
- 14.6 in (371 mm)
- Humidity
- 83%
- Cloud cover
- 76%
- Daylight
- ~12 h 05 min
- Comfort score
- 35/100 · Tough
What September feels like
Afternoons run hot at about 87°F (31°C), which leaves mornings and evenings as the time for walking.
Nights stay warm too, with lows averaging 78°F (26°C).
With 83% average humidity, it feels muggy.
It's a very wet month, with around 14.6 in (371 mm) of rain, so keep plans flexible and have indoor backups ready.
Expect plenty of overcast days, with cloud cover near 76%.
Plan around September
September is one of the lower-scoring months here; the best are February & March.
- Start of the wettest three-month stretch (September – November), which brings about 53.0 in (1345 mm) in total.
- Comfort slips from 42/100 in August to 35/100.
- Our Central Vietnam Food & Heritage route recommends Feb – Apr, so September falls outside its suggested window.
What to pack for September
- Light, breathable clotheshighs average 87°F
- Sun hat and sunscreenmidday heat
- Refillable water bottleeasy to dehydrate in the heat
- Quick-dry fabrics83% average humidity
- Rain jacket and waterproof shoes14.6 in of rain on average
- Comfortable walking shoesmost picks involve some walking
What to do in Hoi An in September
Wet days call for a roof: these picks favor sit-down and indoor stops, plus a few for drier spells.
Bánh Mì Phượng
Famous bánh mì stand with many filling combinations.
Why now A sit-down stop to wait out showers in a month with 14.6 in of rain.
Hoi An Central Market
Riverside market with a food hall serving cao lầu and mì Quảng.
Why now Easy to slot in when September's rain moves in.
Reaching Out Tea House
Silent teahouse staffed by speech- and hearing-impaired staff; order with wooden blocks.
Why now Keeps part of the day dry on wetter September days.
Japanese Covered Bridge
Late-1500s covered bridge with a small temple, the old town's landmark.
Tan Ky Old House
Two-century-old merchant house blending Japanese, Chinese and Vietnamese design.
Nearby in September
- Da Nang in September~15 mi · highs 87°F, 14.6 in rain · similar daytime temperatures, about as wet
- Hue in September~64 mi · highs 87°F, 15.0 in rain · similar daytime temperatures, about as wet
NASA POWER 2001–2025 monthly averages on a ~50 km grid, temperatures adjusted from the grid cell's ~156 m to Hoi An's ~7 m elevation (standard lapse rate). Comfort scores weigh temperature, rain, humidity and cloud: see how we score each month. Check a forecast before you go.
Hoi An in September: quick answers
Is September a good time to visit Hoi An?
It's one of the tougher months here, scoring 35/100, held back mainly by rain. The best months are February & March. Expect highs of 87°F (31°C) and 14.6 in (371 mm) of rain. Our Central Vietnam Food & Heritage route recommends Feb – Apr, so September is outside its suggested window.
How hot is Hoi An in September?
Average highs are 87°F (31°C) and average lows 78°F (26°C), making it the 5th-warmest month by daytime highs.
Does it rain a lot in Hoi An in September?
Yes: about 14.6 in (371 mm) of rain falls across September on average, the 3rd-wettest month of the year. The annual total is about 87.0 in (2209 mm).
What should I pack for Hoi An in September?
Bring light, breathable clothes (highs average 87°F), sun hat and sunscreen (midday heat), refillable water bottle (easy to dehydrate in the heat), quick-dry fabrics (83% average humidity) and rain jacket and waterproof shoes (14.6 in of rain on average).
Planning Hoi An in September?
Plan it together in TripsCircle: one itinerary, one shared packing list and costs split as you go.