If you’re looking forward to lots of outings with your partner, check out these details about year-round temperatures in Thandwe: The hottest months are usually April and May with an average temp of 79°F, while the coldest months are January and February with an average of 74°F. The rainiest months in Thandwe are July, June, August, and September, with each month seeing an average of 31 inches of rainfall.