Planning for the weather is an important factor for making your trip to Tay Ninh a success, especially when you’re splurging. The hottest months are usually March and April with an average temp of 85°F, while the coldest months are January and December with an average of 81°F. The rainiest months in Tay Ninh are September, October, July, and August, with each month seeing an average of 12 inches of rainfall.