If you’re looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Taitung: The hottest months are usually July and June, with an average temperature of 27°C, while the coldest months are January and February, with an average of 19°C. The rainiest months in Taitung are August, September, July and June, with each month seeing an average of 337 mm of rainfall.