Taking the local weather in Miaoli into account is an important factor for planning your visit, especially if you plan to spend your trip by the pool. The hottest months are usually August and September, with an average temperature of 26°C, while the coldest months are January and February, with an average of 18°C. The rainiest months in Miaoli are August, June, May and July, with each month seeing an average of 354 mm of rainfall.