Planning for the weather is a good way to make your trip to Phanom Dong Rak relaxing and enjoyable, especially when you're splurging. The hottest months are usually April and March, with an average temperature of 29°C, while the coldest months are January and December, with an average of 25°C. The rainiest months in Phanom Dong Rak are September, July, August and October, with each month seeing an average of 257 mm of rainfall.