Although Taiwan is sub-tropical, the mountains can be chilly in summer (June to August) and snowy in winter (December to February). The dry season lasts from November to January in the north but extends to April in the south. Summer is hot and sticky all over the low parts of the island, with drenching rains in the mountains. Daytime temperatures in Taipei are around 33°C (91°F) in summer and 19°C (66°F) in winter, while the southern regions experience warmer winters with daytime highs of around 24°C (75°F). In winter monsoon winds can sweep across the island from Central Asia and cool the air by 10°C (50°F) or more in a matter of hours.