If you’re looking forward to lots of outings with your partner, check out these details about year-round temperatures in Myitkyina: The hottest months are usually April and May with an average temp of 77°F, while the coldest months are January and December with an average of 65°F. The rainiest months in Myitkyina are July, June, August, and September, with each month seeing an average of 18 inches of rainfall.