Weather is probably a major factor when you plan your trip to Viet Tri, 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 December, with an average of 19°C. The rainiest months in Viet Tri are August, July, June and September, with each month seeing an average of 358 mm of rainfall.