Hong Kong weather ranges from cool climes to tropical heat, depending on the time of year. The months of September through December are pleasant and temperate. The best time to visit is October, with its amazing festivals and perfect island weather. Bring a jacket when visiting between December and February. March begins to warm up, and from June to August the rising temperatures and humidity makes it the warmest and stickiest months of the year. Summer is typhoon season. Always carry an umbrella to fight the rain and/or sunshine.