Hoi An weather by month
Hoi An is warmest in June (34°C average high) and coolest in January (24°C). For warm, mostly dry weather, go April to June. The sea is warm enough for easy swimming all year.
Warmest month
June
34°C
Coolest month
January
24°C
Wettest month
October
506 mm
Flight from London
12h
direct, estimated
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Hoi An temperature by month
Tap a month for the detail and warmer alternatives.
| Month | Day | Night | Sea | Rain |
|---|---|---|---|---|
| January | 24°C | 20°C | 24°C | 167 mm |
| February | 25°C | 20°C | 24°C | 85 mm |
| March | 27°C | 22°C | 25°C | 67 mm |
| April | 30°C | 24°C | 26°C | 65 mm |
| May | 32°C | 26°C | 28°C | 89 mm |
| June | 34°C | 27°C | 30°C | 103 mm |
| July | 33°C | 27°C | 30°C | 153 mm |
| August | 34°C | 27°C | 31°C | 154 mm |
| September | 31°C | 25°C | 31°C | 285 mm |
| October | 28°C | 24°C | 29°C | 506 mm |
| November | 27°C | 23°C | 27°C | 432 mm |
| December | 25°C | 21°C | 25°C | 376 mm |
When to go to Hoi An
What is the best month to visit Hoi An for sun?
For warm, mostly dry days, go April to June, going by our 10-year averages.
What is the hottest month in Hoi An?
June averages 34°C. January is the coolest at 24°C.
When does it rain most in Hoi An?
October, with about 506 mm of rain.
When is the sea warm enough to swim in Hoi An?
all year, when the sea averages 21°C or more.
How we measured this
Daily averages from 2016 to 2025, from the Open-Meteo historical weather archive (ECMWF ERA5 reanalysis); sea temperatures are 2023 to 2025 averages from the Open-Meteo marine archive. Rain is the average monthly total.
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