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The subtropical climate in Hong Kong means that expats living there will experience cold winters, hot, humid summers, and a rainy season that extends from spring through summer.
Spring in Hong Kong lasts from March to May, and is marked by rising temperatures and increased humidity as summer approaches. The weather tends to be mild and pleasant during this period, but expats should note that the weather in Hong Kong can change quickly, so it's best to expect the unexpected.
The Hong Kong summer runs from May to September, bringing hot and humid weather with occasional thunderstorms, showers and typhoons. Temperatures can peak as high as 33°C (91°F), and humidity levels tend to make the heat even more uncomfortable.
Autumn lasts from October to early December and is arguably the best time of year in Hong Kong. Temperatures tend to be comfortable, and days are often sunny with a pleasant breeze. Humidity is low, rainfall is uncommon, skies are clear and blue, and temperatures are warm, but not stifling.
Winter proceeds from December to February, with temperatures hovering around 15°C (59°F). Winter in Hong Kong tends to be cloudy and cold, but dry and free of snow and frost.
Typhoons may occur from May to November. Apart from gale force winds, the most notable consequences of typhoons are heavy rains that last for days at a time, causing flooding and potentially dangerous landslides. News and radio broadcasts will usually warn residents of approaching typhoons, which are ranked according to a scale.