Planning for the weather is a good way to make your trip to Taichung relaxing and enjoyable, especially when you’re splurging. The hottest months are usually July and August with an average temp of 82°F, while the coldest months are January and February with an average of 65°F. The rainiest months in Taichung are June, August, May, and April, with each month seeing an average of 12 inches of rainfall.