Weather is probably a major factor when you plan your trip to Duy Xuyen, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually June and July, with an average temperature of 28°C, while the coldest months are January and February, with an average of 22°C. The rainiest months in Duy Xuyen are November, October, September and December, with each month seeing an average of 475 mm of rainfall.