Planning for the weather is a good way to make your trip to Mae Pim relaxing and enjoyable, especially when you’re splurging. The hottest months are usually April and May with an average temp of 84°F, while the coldest months are January and December with an average of 81°F. The rainiest months in Mae Pim are September, July, August, and October, with each month seeing an average of 14 inches of rainfall.