What is the temperature of Taiwan in mid to end June?

The temperature may range from 75 F to 90 F. There may have several rainy days in June. Generally speaking, June to October is the typhoon season. The weather condition would influence the sightseeing. Thus you are advised to change the travel plan if possible.

Seems it will rain not much so always have an umbrella with you. Sometimes sunny sometimes little rain so no worries Taiwan is beautiful you must visit. Plus you are so near to Taiwan. I have been to Singapore several times almost same climate but Singapore is more hotter than Taiwan.