The climate of Hoi An is considered tropical.  This means that the temperatures are warm throughout the year, and the year is distinctively broken up by the wet and dry seasons. 

Although the temperatures are warm throughout the year, the hottest months on average are June and July, during which time the daily high temperatures will be in the mid 90’s.  The nighttime temperatures during these months will drop to the 70’s.  The coldest months of the year are December and January.  During these months the daily temperatures will be in the upper 70’s, and will drop to the mid 60’s during the nights. 

Generally more important to visitors than temperatures is the rain.  The rainy (or monsoon) season in Hoi An is from September until January.  During this time, rain clouds will constantly move through the area.  There are days during which sunshine is abundant, but they are not the majority.  A noticeable decrease in tourism can be seen during the wet season.  The dry season is from February until May. These months provide plenty of sunshine, with warm temperatures. All around, the best time to visit Hoi An is between May and June