Hoi An Weather in September
In Hoi An, September brings very high daytime temperatures around 32°C (90°F), with nights cooling to 26°C (79°F). This month falls within the rainy season, so expect frequent rainfall.
Rainfall in Hoi An in September
Hoi An is in the rainy season in September, with rain on around 19 days and an average of 308 mm (12 in). With high rainfall totals spread across the month, individual showers can be very heavy. Waterproof gear is strongly recommended.
Temperature in Hoi An in September
Hoi An in September gets highs of 32°C (90°F) during the day and drops to 26°C (79°F) at night. For most visitors, the main thing to prepare for is the heat during the day. With lows of 26°C (79°F), it stays warm throughout the night. A cold shower before going to sleep is one of the easiest ways to cool down before bed.
Sunshine in Hoi An in September
The city usually sees around 180 hours of sunlight, indicating a moderately sunny period (despite it being part of rainy season).Our weather planner can help you find worldwide destinations with pleasant weather during this period. March typically offers the best weather for Hoi An.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Vietnam, check out our Hoi An's climate page.
Hoi An Temperature in September
Min Temperature
26°C (79°F)
Max Temperature
32°C (90°F)
Chance of Rain
62%
Precipitation
308 mm (12 in)
Rainy days
19 days
Humidity
82%
Sunshine
180 hours
Percentage Sunshine
Daily Historical Temperatures
48-year average (1976-2025)
Based on our historical records, temperatures in Hoi An typically stay consistent throughout September, with daily highs averaging around 32°C (90°F). Nights are warm, with lows around 25°C (77°F).
Average temperatures in September
Daily Historical Precipitation
48-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Hoi An in September
Browse day-by-day weather records for Hoi An spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Hoi An historical weather extremes in September
Based on 32 years of weather observations in Hoi An between 1993 and 2025, these are the recorded extremes.
- On September 8, 2024, temperatures climbed to 38°C (100°F), marking the warmest September day on record.
- The lowest daytime temperature in September was 24°C (75°F), recorded on September 26, 2011.
- The coldest night in September in Hoi An was on September 15, 2000, with a minimum of 20°C (68°F).
Best Places in Vietnam in September
Find out more about the weather in Vietnam and which places have the best travel conditions in this month. See all of Vietnam in September →
perfect weather
pleasant
tolerable
unpleasant
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What to Wear in Hoi An in September
Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Also bring a poncho, it will rain a lot! Waterproof everything you can. Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Hoi An in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Vietnam, check out our Hoi An's climate page.
Temperature Rainfall Sunshine Humidity
See the full Hoi An climate overview or explore weather in Vietnam.
