Hoi An benefits from the Central Vietnam's climate which is hot and humid, with only one monsoon pear year.
Although in the tropics, the sea breeze helps maintains a year round temperature which is pleasant.
In January the temperature is fairly cool, from February to June it is a very sunny spring with a pleasant temperature. The months of June, July and August are very hot. But the heat is bearable because of the sea breeze.
The rainy season is from October to December.