Taiwan concentrates Taipei 101's once-tallest tower and Shilin Night Market, the Taroko Gorge's marble walls, the Sun Moon Lake high in the central mountains, and Tainan's old Dutch and Qing-era streets in the south.
Cool dry autumn with Taipei 101 fireworks New Year's Eve, Maple Leaf season at Aowanda in late November, and Taroko Gorge accessible without summer typhoon risks.
Spring with cherry blossoms at Yangmingshan, Matsu Pilgrimage in mid-March drawing 100,000 to follow the goddess from Dajia, and Tainan accessible before summer heat.
Hot wet summer with Taipei at 33°C and humidity, typhoon risk peaking July-September, but indoor night markets stay active and Pingxi Sky Lantern Festival aside.
Cool winter with Spring Festival/Chinese New Year in late January-February, Pingxi Sky Lantern Festival on Lantern Festival night, and Taipei night markets at peak indoor activity.