If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Naypyidaw: The hottest months are usually April and March with an average temp of 81°F, while the coldest months are January and February with an average of 72°F. The rainiest months in Naypyidaw are July, August, June, and September, with each month seeing an average of 13 inches of rainfall.