If you're looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Phu Ruea: 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 Phu Ruea are August, September, July and May, with each month seeing an average of 270 mm of rainfall.