Planning for the weather is a good way to make your trip to Dungun relaxing and enjoyable, especially when you’re splurging. The hottest months are usually May and June with an average temp of 82°F, while the coldest months are February and January with an average of 79°F. The rainiest months in Dungun are December, November, October, and September, with each month seeing an average of 19 inches of rainfall.