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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 wet-and-dry climate.
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The Four Seasons in Hong Kong
In winter, the weather is cool, with generally bright and dry weather in early winter but in late winter, it is typically overcast and occasional cold fronts are experienced. Snow and frost are unlikely to form as sub-zero Celsius temperatures very rarely occur at sea level. Rainfall is also uncommon at this stage.
In spring, the chance of rainfall increases, and humidity is usually higher than in autumn.
June(Summer) to September(fall) are hottest months of the year. Temperature ranges between 26 °C and 34 °C (79 °F to 93 °F) with humidity of 60–70% during the day, and even higher at night. Thunderstorms and heavy rain are common. Hong Kong may be hit by typhoons during summer and early autumn, but these events are not unknown in late spring either.
In autumn the weather is generally sunny, with less frequent rainfall. They are often considered the most pleasant months because of mild to warm temperatures without the high humidity experienced in spring and summer.
| Winter
(November~February) |
Spring
(March~April) |
Summer
(May~August) |
Autumn (September~October) | |
|---|---|---|---|---|
| Temperature | Mild (15-25°C) | Warm (18-27°C) | Generally hot days (30-35°C) and warm nights (25-30°) | Warm (25-30°C) |
| Pressure |
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|
|
| Relative Humidity | Relative humidity is fairly low but it fluctuates as dry, cool air from Mainland China alternates with warm, moist air from East China Sea over Hong Kong | Relative humidity begins to rise. | Relative humidity is very high and could reach over 80%. | Relative humidity starts to fall. |
| Precipitation and Condensation |
|
|
|
|
| Wind | Dry, cool, and strong north-easterlies blow from Mainland China | Warm, light southerlies occasionally alternate with cold, dry north-easterlines | Warm, moist southerlies blow from the sea | Winds become cooler, dries, and easterly |
| Summary | Weather condition generally stable, but anticyclones and cold fronts bring changeable weather at times. |
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Conditions become more stable and pleasant. |
Climate of the past decade
1997. 1997 was the wettest year since records began in 1884. Rainfall at the Hong Kong Observatory amounted to 3343.0 millimetres, 51 per cent above normal and exceeding the previous record set in 1982.
1998. It was the warmest year since records began in 1884. The annual mean temperature was 24.0 degrees Celsius, 0.2 °C higher than the previous record set in 1966. The annual mean daily minimum temperature of 22.1 °C was also the highest on record.
1999. With an annual mean temperature of 23.8 °C, 1999 was the third warmest year on record. The monthly mean temperatures for all months except May, August and December were above their respective normal figures.
2000. The year 2000 was warmer and wetter than usual. The mean temperature of 23.3 °C was the tenth highest on record and the mean minimum temperature of 21.5 °C was the sixth highest. The annual total rainfall of 2752.3 millimetres was 24 per cent above normal.
2001. The year 2001 was warmer and wetter than usual. The mean temperature of 23.6 °C was 0.6 °C above normal, ranking the sixth highest on record. The mean minimum temperature of 21.8 °C was the second highest on record. The annual total rainfall of 3091.8 millimetres also ranked the fourth highest.
2002. The year 2002 was the second warmest year on record. The mean temperature of 23.9 °C was 0.9 °C above normal.
2003. The year 2003 was the sixth warmest year since records began in 1884. The mean temperature, 23.6 °C, was 0.6 °C above normal.
2004. Globally, the year 2004 was the fourth warmest year since instrumental temperature record began in 1861. In Hong Kong, 2004 was the ninth warmest year on record. The annual mean temperature was 23.4 °C, 0.4 °C above normal.
2005. Locally in Hong Kong, 2005 was the third wettest year on record. The total rainfall of 3214.50 millimetres was 45.2 percent above normal.
2006. Globally, the year 2006 is the sixth warmest year on record. In Hong Kong, it was the eighth warmest year since record began in 1884. The annual mean temperature of 23.5 °C was 0.5 °C higher than normal.
2008. Hong Kong was lashed by a torrential storm on the morning of June 7 which dumped up to 300mm of rain including 145.5mm between 8am and 9am killing 2 people. The storm also caused traffic delays and dozens of flight delays.
See also
External links
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Wikimedia Commons has media related to: Climate of Hong Kong |
- Hong Kong Observatory web site
- Hong Kong Underground Observatory web site
- The Climate Information site from HKO
- Explanation of Hong Kong's Typhoon Signal System
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