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The climate of Hong Kong is a monsoon-influenced humid subtropical climate (Köppen climate classification ''Cwa''), just short of being a tropical monsoon climate (Köppen climate classification ''Am''). ==Seasons== Hong Kong has four seasons: a comfortable to pleasant and dry winter, an unstable and wet spring, a hot and humid summer, and a warm and moderately dry autumn. Hong Kong is affected by both cool northeast monsoons and warm maritime airstreams. Most of the rainfall occurs from May to September, which is the rainy season. Winter is generally considered the best season to visit Hong Kong, with dry weather, low humidity and comfortable temperatures. In the coldest season, the weather is generally comfortable to warm, with average temperatures hovering between and . However, northeast winter monsoons bring frequent cold spells, which can cause the temperature to dip below even in urban areas, despite Hong Kong's coastal location just below the Tropic of Cancer. Conversely, it can occasionally get too hot even in Winter; temperatures as high as have been recorded in December. The season starts sunny in December and becomes cloudier towards February. The lowest temperature ever recorded was in 1893, and subzero temperatures have been recorded in the northern New Territories and on high ground. Warm maritime airstreams also commonly raise the temperature above . The coldest months (February and January) are comfortable to warm with temperatures ranging from about to . Spring brings warmer and more humid weather. It is cooler than autumn, but it is the most humid time of the year. There is a sharp increase in rainfall around April. Temperatures are also noticeably rising with an average temperature of in March to about degrees in May, from warm to hot. Spring weather is very unstable; it could be hot on one day, and cold on the next. The average minimum temperature of the whole season is . March starts off as warm as December, but gradually gets hotter towards the end of the month. The average temperature range is usually from to , but there are significant temperature variations throughout the month, ranging from below to above at times. April is warm to hot with temperatures ranging from about to . The average rainfall is , more than March. May is warm to hot with average temperatures ranging from about to . Spring is the cloudiest time of the year, with March averaging only 90.8 hours of bright sunshine. Summer weather is hot, humid and unstable. Thunderstorms and brief showers are common, as well as sunny conditions. June has the highest average rainfall of any month. Temperatures are usually above during the day, which, coupled with a high humidity (often up to 82% in June), can result in an extreme heat index. Extreme heat indices are also caused by continuous sunshine and low breeze, usually lasting for a long time around July and August, as a result of subtropical high pressure areas. This also occurs before typhoons start hitting Hong Kong or nearby regions in the northeast, e.g. Taiwan or Eastern Coast of China; such outbound airstreams bring even hotter weather, in addition to dirtier air. Nights are also hot with an average minimum temperature of . Hong Kong is frequently hit by typhoons in summer. Temperatures are still high in Autumn ( to ) while humidity and rainfall are considerably lower. Moreover, autumn is the sunniest season in Hong Kong, with October averaging 192.9 hours of bright sunshine. There is a big decrease in rainfall around October while temperatures are gradually decreasing from hot to warm, from in September to in November. September is hot with average temperatures ranging from about to . It is also slightly drier than August with an average humidity of 78%. October is warm to hot with average temperatures ranging from to . November is comfortable-warm with average temperatures ranging from to . 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Climate of Hong Kong」の詳細全文を読む スポンサード リンク
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