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Contents
- The climate of Hong Kong
- The best time to visit Hong Kong
- The worst time to visit Hong Kong
- Spring weather in Hong Kong
- Summer weather in Hong Kong
- Autumn weather in Hong Kong
- Winter weather in Hong Kong
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average humidity
- Average rainfall
- Average rainfall days
- Average sea temperature
- Average daylight
- Average sunshine
- Average UV index
The lit city of Hong Kong, on the Hong Kong Island
The climate of Hong Kong
Under the Köppen climate classification, Hong Kong is described as having a humid subtropical climate with a notable season of dry winter. This south-eastern city has a latitude that places it within the tropics; therefore it experiences considerable amounts of heat and precipitation throughout the year.
Precipitation fluctuates remarkably across different months, with the peak occurring between May and September, while the minimum levels are experienced from November to January. Annual rainfall ranges from 25mm (0.98") in January to as high as 456mm (17.95") in June. The number of days with rainfall also follows this trend, January has only an average of 5.4 days of rainfall, while June has up to 19.1 days.
Relative humidity in Hong Kong persists at generally high levels throughout the year, between 69% and 83%, maintaining a humid environment regardless of the season. Temperature fluctuations are notable, with the lowest average minimum temperature being 14.5°C (58.1°F) in January and the highest average maximum temperature peaking at 31.4°C (88.5°F) in July. Regarding sunlight, the average daylight hours span from 10.8 hours in December to 13.5 hours in June. Nevertheless, sunshine hours range between 2.9 hours in March and 6.8 hours in July. The UV index fluctuates from 7 in the less sunny months to 12 during the sunnier period, indicating a very high risk of harm from unprotected sun exposure.
Precipitation fluctuates remarkably across different months, with the peak occurring between May and September, while the minimum levels are experienced from November to January. Annual rainfall ranges from 25mm (0.98") in January to as high as 456mm (17.95") in June. The number of days with rainfall also follows this trend, January has only an average of 5.4 days of rainfall, while June has up to 19.1 days.
Relative humidity in Hong Kong persists at generally high levels throughout the year, between 69% and 83%, maintaining a humid environment regardless of the season. Temperature fluctuations are notable, with the lowest average minimum temperature being 14.5°C (58.1°F) in January and the highest average maximum temperature peaking at 31.4°C (88.5°F) in July. Regarding sunlight, the average daylight hours span from 10.8 hours in December to 13.5 hours in June. Nevertheless, sunshine hours range between 2.9 hours in March and 6.8 hours in July. The UV index fluctuates from 7 in the less sunny months to 12 during the sunnier period, indicating a very high risk of harm from unprotected sun exposure.
The best time to visit Hong Kong
The optimal time to visit Hong Kong is dictated by the visitor's weather preference. For those who favor mild temperatures, it is advisable to consider the period between October and December. During these months, temperature ranges from 20.2°C (68.4°F) to 27.8°C (82°F), and the rainfall is relatively low, averaging between 27mm (1.06") to 101mm (3.98"). The number of rainfall days is also fewer, averaging between 4.5 and 7.4 days.
The worst time to visit Hong Kong
The months to be avoided for a visit to Hong Kong largely depend on one's tolerance for high rainfall levels, tropical storm risks, and hot temperatures. These conditions are common during the summer monsoon season between May and September. This period experiences heavy rains, with monthly rainfall averages ranging from 305mm (12.01") and 456mm (17.95"). The temperature during this time is relatively high, ranging from 25°C (77°F) to 31.4°C (88.5°F) which can make the weather uncomfortably humid.
Spring weather in Hong Kong
The spring in Hong Kong, which occurs between February and April, is distinguished by gradually warming temperatures along with a consistent rise in humidity and precipitation. Average high temperatures during this period range from 18.9°C (66°F) in February to 25°C (77°F) in April, while average low temperatures increase from 15°C (59°F) to 20.8°C (69.4°F). This period also marks the start of the rainy season with an increase in monthly average rainfall from 54mm (2.13") in February to 175mm (6.89") in April.
Summer weather in Hong Kong
Summer in Hong Kong, from May to August, is marked by hot, humid, and rainy conditions due to the monsoon influence. The high temperature averages from 28.4°C (83.1°F) to 31.4°C (88.5°F), and the low averages 24.1°C (75.4°F) to 26.8°C (80.2°F). This season is characterized by the highest amount of rainfall, with the heaviest precipitation seen in June at 456mm (17.95"). The month of August is particularly notable because of the high temperature and humidity combined with high levels of rainfall, a total of 432mm (17.01") on average.
Autumn weather in Hong Kong
The autumn months, September to November, represent relief from the sweltering summer heat. The high temperature averages decrease from 30.1°C (86.2°F) in September to 24.1°C (75.4°F) in November, while the low averages similarly decrease from 25.8°C (78.4°F) to 19.8°C (67.6°F). Even though the first autumn month experiences substantial rainfall, the remaining months witness a significant reduction, with only 38mm (1.5") in November.
Winter weather in Hong Kong
Winter in Hong Kong, spanning December and January, is typically marked by cooler and drier conditions. While the average high temperature drops to 18.6°C (65.5°F) by January, the lowest average drops to 14.5°C (58.1°F). With a range of 25mm (0.98") to 27mm (1.06"), rainfall stays relatively low, contributing to the characteristic dry winter. December sees the fewest daylight hours of the year, averaging 10.8 hours. However, sunshine duration increases to 5.6 hours.
Weather in January
Taking into account the variation in the weather parameters of Hong Kong, the start of a new year is characterized by mild daily temperatures. The average high in January hovers at about 18.6°C (65.5°F), making it one of the cooler months. Weather in January »
Weather in February
With the arrival of February, an uptick in the overall humidity levels is registered. The gradual warming trend leads to a slight increase in the average temperature from January to February. However, it is the increased precipitation, marked by a substantial leap from 25mm (0.98") to 54mm (2.13") that distinguishes this month. Weather in February »
Weather in March
March brings along the transition from winter to spring in Hong Kong. A discernible change in the weather pattern is perceived through longer daylight hours and a rise in the daily temperature. Despite the higher daily temperatures, nocturnal conditions retain a certain level of coolness. Weather in March »
Weather in April
April signifies the onset of a significantly warmer phase in Hong Kong’s annual weather cycle. Alongside the noticeable warmth, the levels of precipitation experience a steep surge taking a jump from 82mm (3.23") in March to a substantial 175mm (6.89"). Weather in April »
Weather in May
As May introduces the early phase of summer, the city of Hong Kong gears up for prolonged sunshine and increased heat. The characteristic traits of May include longer daylight hours and a significant rise in both daily and nightly temperatures. Weather in May »
Weather in June
June in Hong Kong signals the full arrival of the hot summer season. Marked by longer daylight hours and higher temperatures, the weather takes on the distinct characteristics of tropical summer. The striking feature of June is the maximum rainfall recorded for any month, peaking at a staggering 456mm (17.95"). Weather in June »
Weather in July
The middle of the year in Hong Kong observes the peak of summer with July being one of the hottest months. Throughout the month, the city experiences an increased duration of daylight and high nocturnal temperatures. However, it isn’t all clear skies and sunshine. Weather in July »
Weather in August
August in Hong Kong carries the essence of summer warmth and high humidity. As the city navigates through this tropical month, the daily temperatures oscillate between moderately hot to high levels. One can also observe an uptick in the levels of rainfall recorded. Weather in August »
Weather in September
With the onset of September, Hong Kong begins to witness a noticeable retraction from the extreme summer conditions. Although the arrival of autumn is greeted with much-needed relief from the sweltering heat, the weather predominantly remains warm. Weather in September »
Weather in October
October marks a distinct tempering of Hong Kong’s weather conditions. A visible drop in temperature and humidity denotes the commencement of the autumn season. With rainfall levels significantly reduced to 101mm (3.98"), the climatic conditions are markedly drier than the preceding months. Weather in October »
Weather in November
The weather in Hong Kong in November is characterized by the declining intensity of sunlight and a notch down in rainfall activity. The decreased rainfall amount of 38mm (1.5") favors more predictable weather and less cloudy skies. Weather in November »
Weather in December
Concluding the year, December depicts the onset of winter in Hong Kong. Although devoid of snowfall, the city sees a drop in temperature, an increase in relative humidity than November, and a significant reduction in rainfall to just 27mm (1.06"). Weather in December »
[Resources]Frequently asked questions
What is the coldest time of year in Hong Kong?
Hong Kong records the coldest temperatures in January, averaging a high of 18.6°C (65.5°F) and a low of 14.5°C (58.1°F).
What is the driest month in Hong Kong?
January is the month with the least rainfall. Rain falls for 5.4 days and accumulates 25mm (0.98") of precipitation.
How many days does it rain in Hong Kong?
Throughout the year, in Hong Kong, there are 137.8 rainfall days, and 2398mm (94.41") of precipitation is accumulated.
What are the months with the lowest UV index in Hong Kong?
The months with the lowest UV index in Hong Kong, Hong Kong, are January, November and December, with an average maximum UV index of 7.
What is the month with the coldest sea water in Hong Kong?
The month with the coldest seawater in Hong Kong, Hong Kong, is February, with an average sea temperature of 18.9°C (66°F).
What is the month with the least sunshine in Hong Kong?
With an average of 2.9h of sunshine, March has the least sunshine of the year.
What are the most humid months in Hong Kong?
April and May, with an average relative humidity of 83%, are most humid months.
When is the highest UV index in Hong Kong?
The months with the highest UV index in Hong Kong are April through August, with an average maximum UV index of 12.
What is the wettest month in Hong Kong?
The month with the most rainfall in Hong Kong, Hong Kong, is June, when the rain falls for 19.1 days and typically aggregates up to 456mm (17.95") of precipitation.
When are the longest days in Hong Kong?
With an average of 13h and 30min of daylight, June has the longest days of the year.
What part of the year is the hottest in Hong Kong?
With average high and low temperatures of 31.4°C (88.5°F) and 26.8°C (80.2°F) respectively, July is Hong Kong's warmest month.
When is the sea warmest in Hong Kong?
The month with the warmest seawater in Hong Kong, Hong Kong, is July, with an average sea temperature of 29.1°C (84.4°F).
What month has the most sunshine in Hong Kong?
With an average of 6.8h of sunshine, July has the most sunshine of the year.
What is the least humid month in Hong Kong?
With an average relative humidity of 69%, December is the least humid month in Hong Kong, Hong Kong.
What is the month with the shortest days in Hong Kong?
The month with the shortest days in Hong Kong is December, with an average of 10h and 48min of daylight.
Is there Daylight Saving Time (DST) in Hong Kong?
Hong Kong does not utilize Daylight Saving Time (DST). HKT timezone is used throughout the entire year.
Average temperature
Hong Kong, Hong Kong
The warmest month (with the highest average high temperature) is July (31.4°C).
The month with the lowest average high temperature is January (18.6°C).
The month with the highest average low temperature is July (26.8°C).
The coldest month (with the lowest average low temperature) is January (14.5°C).
Average humidity
Hong Kong, Hong Kong
The months with the highest relative humidity are April and May (83%).
The month with the lowest relative humidity is December (69%).
Average rainfall
Hong Kong, Hong Kong
- Average rainfall in January:
24.7mm - Average rainfall in February:
54.4mm - Average rainfall in March:
82.2mm - Average rainfall in April:
174.7mm - Average rainfall in May:
304.7mm - Average rainfall in June:
456.1mm
- Average rainfall in July:
376.5mm - Average rainfall in August:
432.2mm - Average rainfall in September:
327.6mm - Average rainfall in October:
100.9mm - Average rainfall in November:
37.6mm - Average rainfall in December:
26.8mm
The wettest month (with the highest rainfall) is June (456.1mm).
The driest month (with the least rainfall) is January (24.7mm).
Average rainfall days
Hong Kong, Hong Kong
- Average rainfall days in January:
5.4 days - Average rainfall days in February:
9.1 days - Average rainfall days in March:
10.9 days - Average rainfall days in April:
12 days - Average rainfall days in May:
14.7 days - Average rainfall days in June:
19.1 days
- Average rainfall days in July:
17.6 days - Average rainfall days in August:
16.9 days - Average rainfall days in September:
14.7 days - Average rainfall days in October:
7.4 days - Average rainfall days in November:
5.5 days - Average rainfall days in December:
4.5 days
The month with the highest number of rainy days is June (19.1 days).
The month with the least rainy days is December (4.5 days).
Average sea temperature
Hong Kong, Hong Kong
The best month for swimming (with the highest average sea temperature) is July (29.1°C).
The coldest month (with the lowest average sea temperature) is February (18.9°C).
Average daylight / Average sunshine
Hong Kong, Hong Kong
- Average daylight in January:
10h and 5min - Average daylight in February:
11h and 2min - Average daylight in March:
12h and 0min - Average daylight in April:
12h and 4min - Average daylight in May:
13h and 1min - Average daylight in June:
13h and 3min
- Average daylight in July:
13h and 2min - Average daylight in August:
12h and 5min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 4min - Average daylight in November:
11h and 1min - Average daylight in December:
10h and 5min
The month with the longest days is June (Average daylight: 13h and 30min).
The month with the shortest days is December (Average daylight: 10h and 48min).
- Average sunshine in January:
4h and 4min - Average sunshine in February:
3h and 2min - Average sunshine in March:
2h and 5min - Average sunshine in April:
3h and 2min - Average sunshine in May:
4h and 3min - Average sunshine in June:
4h and 5min
- Average sunshine in July:
6h and 5min - Average sunshine in August:
6h and 1min - Average sunshine in September:
5h and 4min - Average sunshine in October:
6h and 2min - Average sunshine in November:
6h and 0min - Average sunshine in December:
5h and 4min
The month with the most sunshine is July (Average sunshine: 6h and 48min).
The month with the least sunshine is March (Average sunshine: 2h and 54min).
Average UV index
Hong Kong, Hong Kong
The months with the highest UV index are April, May, June, July and August (UV index 12).
The months with the lowest UV index are January, November and December (UV index 7).
Hong Kong, Hong Kong
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