Hoi An in September
In September, Hoi An averages 32°C (90°F) during the day and 24°C (75°F) at night, with frequent rain — about 15 days of the month see precipitation (335 mm total).
ShoulderConditions are warm and beach-friendly. Plan for unsettled weather and bring rain gear.
September is one of the wetter and less comfortable months in Hoi An. If your dates are flexible, consider a different time of year.
How September compares to the rest of the year in Hoi An
September is in the middle of the year for warmth in Hoi An (5th of 12) and one of the wettest months (3rd of 12). Daytime temperature runs 2°C above the annual average (30°C). September runs 2°C cooler than August (34°C) and cools 3°C in October (29°C).
September sunrise & sunset in Hoi An
Times shown for Hoi An local time (Asia/Ho_Chi_Minh), calculated for the 15th of September. They shift by a few minutes day to day across the month.
Photography light in Hoi An — September
Golden-hour and blue-hour windows for the 15th of September, in Hoi An's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Hoi An in September
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on September's tier (Shoulder) and Hoi An's popularity.
Crowds & pricing — September in Hoi An
Hoi An is in a shoulder season month — fewer crowds, slightly lower prices, and a calmer atmosphere than peak weeks. Most major sights stay open with normal hours, though a handful of seasonal restaurants or boat trips may run reduced schedules. Many regulars consider these months the best time to visit because you trade a small amount of weather reliability for a much more pleasant on-the-ground experience.
Sun & mosquito risk — September in Hoi An
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Hoi An in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 24°C / 75°F | 19°C / 66°F | 75 mm | 11 | 0 |
| February | 26°C / 79°F | 20°C / 68°F | 30 mm | 5 | 0 |
| March | 29°C / 84°F | 21°C / 70°F | 30 mm | 5 | 0 |
| April | 31°C / 88°F | 23°C / 73°F | 35 mm | 5 | 0 |
| May | 33°C / 91°F | 24°C / 75°F | 80 mm | 8 | 0 |
| June | 34°C / 93°F | 25°C / 77°F | 85 mm | 8 | 0 |
| July | 34°C / 93°F | 25°C / 77°F | 95 mm | 8 | 0 |
| August | 34°C / 93°F | 25°C / 77°F | 110 mm | 9 | 0 |
| September | 32°C / 90°F | 24°C / 75°F | 335 mm | 15 | 0 |
| October | 29°C / 84°F | 23°C / 73°F | 605 mm | 21 | 0 |
| November | 27°C / 81°F | 22°C / 72°F | 420 mm | 18 | 0 |
| December | 25°C / 77°F | 20°C / 68°F | 210 mm | 15 | 0 |
Other cities with similar September weather
🌍 See the full ranked list of climate twins for Hoi An in September →
Frequently asked questions
How hot is Hoi An in September?
In September, Hoi An averages a high of 32°C (90°F) and a low of 24°C (75°F) — generally hot.
Does it rain a lot in Hoi An in September?
September is quite rainy in Hoi An, with about 15 rainy days on average.
Is September a good time to visit Hoi An?
September is hot but on the rainy side. It suits travelers who are comfortable with hot weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Hoi An in September?
Pack lightweight, breathable clothing, sunglasses and sunscreen, plus a compact umbrella or rain jacket. See the full September packing list for Hoi An for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.