Weather will likely play an important role when you plan your trip to Nong Phu, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually April and March, with an average temperature of 28°C, while the coldest months are January and December, with an average of 22°C. The rainiest months in Nong Phu are August, September, July and May, with each month seeing an average of 270 mm of rainfall.