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Climate and Average Weather Year Round in Hong Kong Hong Kong SAR China

In Hong Kong, the wet season is hot, oppressive, and overcast and the dry season is comfortable, windy, and mostly clear. Over the course of the year, the temperature typically varies from 57°F to 90°F and is rarely below 49°F or above 94°F.

Based on the tourism score, the best times of year to visit Hong Kong for warm-weather activities are from mid to late March and from late October to late December.

Climate in Hong Kong

comfortablewarmhotwarmJanFebMarAprMayJunJulAugSepOctNovDecNowNow74%74%15%15%clearovercastprecipitation: 9.7 inprecipitation: 9.7 in0.8 in0.8 inmuggy: 100%muggy: 100%2%2%drydrytourism score: 7.8tourism score: 7.81.81.8
Hong Kong weather by month. Click on each chart for more information.

The hot season lasts for 4.7 months, from May 20 to October 11, with an average daily high temperature above 85°F. The hottest month of the year in Hong Kong is July, with an average high of 89°F and low of 82°F.

The cool season lasts for 2.9 months, from December 12 to March 9, with an average daily high temperature below 71°F. The coldest month of the year in Hong Kong is January, with an average low of 57°F and high of 66°F.

Average High and Low Temperature in Hong Kong

Average High and Low Temperature in Hong KonghotcoolJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°F110°F110°FJan 2366°FJan 2366°FJul 2490°FJul 2490°F57°F57°F82°F82°FMay 2085°FMay 2085°FOct 1185°FOct 1185°FDec 1271°FDec 1271°FMar 971°FMar 971°F77°F77°F77°F77°F61°F61°F63°F63°FNowNow
The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.
AverageJanFebMarAprMayJunJulAugSepOctNovDec
High66°F67°F72°F79°F84°F88°F89°F89°F88°F84°F77°F70°F
Temp.62°F63°F68°F74°F80°F84°F85°F85°F83°F79°F73°F65°F
Low57°F59°F64°F71°F77°F81°F82°F81°F80°F75°F68°F60°F

The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Average Hourly Temperature in Hong Kong

Average Hourly Temperature in Hong KongJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMNowNowcoolcoolcomfortablewarmhotcomfortablecool
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.
Map
Marker
© Esri, et al.

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In Hong Kong, the average percentage of the sky covered by clouds experiences extreme seasonal variation over the course of the year.

The clearer part of the year in Hong Kong begins around September 30 and lasts for 6.9 months, ending around April 26.

The clearest month of the year in Hong Kong is December, during which on average the sky is clear, mostly clear, or partly cloudy 72% of the time.

The cloudier part of the year begins around April 26 and lasts for 5.1 months, ending around September 30.

The cloudiest month of the year in Hong Kong is June, during which on average the sky is overcast or mostly cloudy 85% of the time.

Cloud Cover Categories in Hong Kong

Cloud Cover Categories in Hong KongclearerclearercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jan 474%Jan 474%Jun 1215%Jun 1215%Sep 3044%Sep 3044%Apr 2645%Apr 2645%NowNowclearmostly clearpartly cloudymostly cloudyovercast
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.
FractionJanFebMarAprMayJunJulAugSepOctNovDec
Cloudier28%33%37%50%73%85%81%80%65%46%34%28%
Clearer72%67%63%50%27%15%19%20%35%54%66%72%

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Hong Kong varies significantly throughout the year.

The wetter season lasts 5.6 months, from April 4 to September 23, with a greater than 31% chance of a given day being a wet day. The month with the most wet days in Hong Kong is June, with an average of 15.9 days with at least 0.04 inches of precipitation.

The drier season lasts 6.4 months, from September 23 to April 4. The month with the fewest wet days in Hong Kong is December, with an average of 2.5 days with at least 0.04 inches of precipitation.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. The month with the most days of rain alone in Hong Kong is June, with an average of 15.9 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 54% on June 17.

Daily Chance of Precipitation in Hong Kong

Daily Chance of Precipitation in Hong KongwetdrydryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jun 1754%Jun 1754%Dec 197%Dec 197%Apr 431%Apr 431%Sep 2331%Sep 2331%NowNowrain
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).
Days ofJanFebMarAprMayJunJulAugSepOctNovDec
Rain2.7d3.7d6.3d10.6d14.7d15.9d15.4d15.7d11.0d4.7d3.3d2.5d

To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Hong Kong experiences extreme seasonal variation in monthly rainfall.

Rain falls throughout the year in Hong Kong. The month with the most rain in Hong Kong is June, with an average rainfall of 9.7 inches.

The month with the least rain in Hong Kong is December, with an average rainfall of 0.8 inches.

Average Monthly Rainfall in Hong Kong

Average Monthly Rainfall in Hong KongJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in5 in5 in10 in10 in15 in15 in20 in20 inJun 109.7 inJun 109.7 inDec 240.8 inDec 240.8 inAug 109.3 inAug 109.3 inNowNow
The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average snowfall.
JanFebMarAprMayJunJulAugSepOctNovDec
Rainfall1.0″1.5″2.5″5.1″7.9″9.7″8.9″9.2″6.2″2.3″1.1″0.8″

The length of the day in Hong Kong varies over the course of the year. In 2021, the shortest day is December 21, with 10 hours, 46 minutes of daylight; the longest day is June 21, with 13 hours, 30 minutes of daylight.

Hours of Daylight and Twilight in Hong Kong

Hours of Daylight and Twilight in Hong KongJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 7 minMar 2012 hr, 7 minMar 2013 hr, 30 minJun 2113 hr, 30 minJun 2112 hr, 8 minSep 2312 hr, 8 minSep 2310 hr, 46 minDec 2110 hr, 46 minDec 21nightnightdayNowNow
The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.
Hours ofJanFebMarAprMayJunJulAugSepOctNovDec
Daylight10.9h11.4h12.0h12.7h13.2h13.5h13.3h12.9h12.2h11.6h11.1h10.8h

The earliest sunrise is at 5:38 AM on June 7, and the latest sunrise is 1 hour, 26 minutes later at 7:05 AM on January 15. The earliest sunset is at 5:38 PM on November 27, and the latest sunset is 1 hour, 33 minutes later at 7:11 PM on July 4.

Daylight saving time (DST) is not observed in Hong Kong during 2021.

Sunrise & Sunset with Twilight in Hong Kong

Sunrise & Sunset with Twilight in Hong KongJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 75:38 AMJun 75:38 AM7:11 PMJul 47:11 PMJul 4Nov 275:38 PMNov 275:38 PM7:05 AMJan 157:05 AMJan 15daynightnightSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of the year 2021. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.

The figure below presents a compact representation of key lunar data for 2021. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases.

Moon Rise, Set & Phases in Hong Kong

The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

Hong Kong experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 8.1 months, from March 15 to November 19, during which time the comfort level is muggy, oppressive, or miserable at least 26% of the time. The month with the most muggy days in Hong Kong is July, with 31.0 days that are muggy or worse.

The month with the fewest muggy days in Hong Kong is January, with 0.7 days that are muggy or worse.

Humidity Comfort Levels in Hong Kong

Humidity Comfort Levels in Hong KongmuggyJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jan 152%Jan 152%100%Jul 30100%Jul 30Mar 1526%Mar 1526%Nov 1926%Nov 1926%NowNowmiserablemiserabledrydrycomfortablecomfortablemuggymuggyhumidhumid
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.
JanFebMarAprMayJunJulAugSepOctNovDec
Muggy days0.7d2.3d9.4d19.5d28.4d29.6d31.0d30.9d28.0d20.6d8.6d1.6d

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Hong Kong experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 5.4 months, from October 3 to March 16, with average wind speeds of more than 11.0 miles per hour. The windiest month of the year in Hong Kong is December, with an average hourly wind speed of 12.6 miles per hour.

The calmer time of year lasts for 6.6 months, from March 16 to October 3. The calmest month of the year in Hong Kong is August, with an average hourly wind speed of 9.4 miles per hour.

Average Wind Speed in Hong Kong

Average Wind Speed in Hong KongwindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mph16 mph16 mph18 mph18 mphDec 912.8 mphDec 912.8 mphAug 209.1 mphAug 209.1 mphOct 311.0 mphOct 311.0 mphMar 1611.0 mphMar 1611.0 mphNowNow
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.
JanFebMarAprMayJunJulAugSepOctNovDec
Wind Speed (mph)12.011.610.910.09.810.610.69.410.111.612.412.6

The predominant average hourly wind direction in Hong Kong varies throughout the year.

The wind is most often from the east for 3.6 months, from January 2 to April 19 and for 3.1 months, from August 29 to December 2, with a peak percentage of 63% on October 24. The wind is most often from the south for 4.3 months, from April 19 to August 29, with a peak percentage of 72% on June 26. The wind is most often from the north for 1.0 months, from December 2 to January 2, with a peak percentage of 49% on January 1.

Wind Direction in Hong Kong

Wind Direction in Hong KongESENJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowsoutheastnorthwest
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Hong Kong is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average water temperature experiences some seasonal variation over the course of the year.

The time of year with warmer water lasts for 4.5 months, from May 30 to October 14, with an average temperature above 80°F. The month of the year in Hong Kong with the warmest water is August, with an average temperature of 84°F.

The time of year with cooler water lasts for 3.5 months, from December 12 to March 26, with an average temperature below 69°F. The month of the year in Hong Kong with the coolest water is January, with an average temperature of 66°F.

Average Water Temperature in Hong Kong

Average Water Temperature in Hong KongwarmcoolJanFebMarAprMayJunJulAugSepOctNovDec60°F60°F65°F65°F70°F70°F75°F75°F80°F80°F85°F85°FAug 784°FAug 784°F66°FJan 2266°FJan 22May 3080°FMay 3080°FOct 1480°FOct 1480°FDec 1269°FDec 1269°FMar 2669°FMar 2669°FNowNow
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.
WaterJanFebMarAprMayJunJulAugSepOctNovDec
Temperature66°F66°F68°F73°F78°F82°F83°F84°F83°F79°F74°F69°F

To characterize how pleasant the weather is in Hong Kong throughout the year, we compute two travel scores.

The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best times of year to visit Hong Kong for general outdoor tourist activities are from mid to late March and from late October to late December, with a peak score in the third week of November.

Tourism Score in Hong Kong

Tourism Score in Hong Kongbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810107.87.81.81.87.07.06.26.2NowNowprecipitationprecipitationcloudscloudstemperaturetemperaturetourism score
The tourism score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Hong Kong for hot-weather activities is from late September to early November, with a peak score in the third week of October.

Beach/Pool Score in Hong Kong

Beach/Pool Score in Hong KongJanFebMarAprMayJunJulAugSepOctNovDec002244668810107.27.21.01.05.85.83.43.4NowNowprecipitationprecipitationcloudscloudstemperaturetemperature beach/pool score
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Methodology

For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.

Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.

Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.

Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.

Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

Temperatures in Hong Kong are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year.

Time Spent in Various Temperature Bands and the Growing Season in Hong Kong

Time Spent in Various Temperature Bands and the Growing Season in Hong KongJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%100%Jan 1100%Jan 1100%Jul 3100%Jul 3NowNowcoldcoolcomfortablewarmhot
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing season.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

Growing Degree Days in Hong Kong

Growing Degree Days in Hong KongJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F1,000°F1,000°F2,000°F2,000°F3,000°F3,000°F4,000°F4,000°F5,000°F5,000°F6,000°F6,000°F7,000°F7,000°F8,000°F8,000°F9,000°F9,000°FJan 790°FJan 790°FMar 11900°FMar 11900°FApr 221,800°FApr 221,800°FDec 319,065°FDec 319,065°FNowNow
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy experiences some seasonal variation over the course of the year.

The brighter period of the year lasts for 1.7 months, from April 1 to May 22, with an average daily incident shortwave energy per square meter above 5.3 kWh. The brightest month of the year in Hong Kong is April, with an average of 5.5 kWh.

The darker period of the year lasts for 2.5 months, from November 23 to February 7, with an average daily incident shortwave energy per square meter below 4.3 kWh. The darkest month of the year in Hong Kong is December, with an average of 4.1 kWh.

Average Daily Incident Shortwave Solar Energy in Hong Kong

Average Daily Incident Shortwave Solar Energy in Hong KongbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhApr 305.6 kWhApr 305.6 kWhDec 184.0 kWhDec 184.0 kWhFeb 74.3 kWhFeb 74.3 kWhNowNow
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.
JanFebMarAprMayJunJulAugSepOctNovDec
Solar Energy (kWh)4.14.55.05.55.35.05.14.85.25.24.54.1

For the purposes of this report, the geographical coordinates of Hong Kong are 22.250 deg latitude, 114.167 deg longitude, and 0 ft elevation.

The topography within 2 miles of Hong Kong is essentially flat, with a maximum elevation change of 0 feet and an average elevation above sea level of 0 feet. Within 10 miles is also essentially flat (0 feet). Within 50 miles is also essentially flat (0 feet).

The area within 2 miles of Hong Kong is covered by water (35%), trees (31%), and artificial surfaces (25%), within 10 miles by water (69%) and artificial surfaces (19%), and within 50 miles by water (74%) and trees (12%).

This report illustrates the typical weather in Hong Kong, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

The details of the data sources used for this report can be found on the Hong Kong International Airport page.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.

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