5-day weather forecast Hong Kong Sep 18, 2026

28°26° · Sunny

Weather forecast Hong Kong Friday Sep 18, 2026: sunny, temperature from 26 °C to 28 °C.

Precipitation probability 13%. Wind up to 8.19 m/s (gusts 9.92 m/s). Air humidity 68–83%, atmospheric pressure 759–761 mm Hg, UV index up to 7.

Sunrise 06:11
Sunset 18:23
First Quarter53% illuminated
Moonrise 12:52 · Moonset 23:32
Chart
Table

Forecast from 26 °C to 28 °C and precipitation

Temperature & Precipitation
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Temperature (°C)262626262626262626272727282828282828272727272727
Precipitation (mm/hr)000000000000000000000000

Cloud cover and precipitation probability

Cloud cover & Rain chance
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Cloud cover (%)294916121717222724553333100000012
Rain chance (%)11131010111111121076555556788991010

Wind speed and direction

Wind & Wind gust
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Wind (m/s)7.117.317.397.57.817.817.8988.198.1187.697.57.397.116.896.616.56.396.616.816.896.816.5
Wind gust (m/s)99.199.119.119.229.319.539.699.59.229.319.729.699.539.3998.818.839.039.319.929.899.699.31
Wind direction (°)ENE 76°ENE 76°ENE 73°ENE 71°ENE 70°ENE 70°ENE 69°ENE 66°ENE 66°ENE 66°ENE 68°ENE 70°ENE 71°ENE 75°E 81°E 85°E 88°E 88°E 84°E 81°E 80°E 80°E 79°ENE 78°

Air humidity

Humidity
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Humidity (%)787980818282828178747068686869697174777880818383

Atmospheric pressure

Pressure
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Pressure (mm Hg)760760760759759760760761761761761761761761760759759759760760760761761761

Ultraviolet index

UV Index
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
UV Index000000077777777777700000

Air quality & pollen

Air quality
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
PM2.5 (µg/m³)30.52724.322.621.921.923.329.931.930.230.931.130.329.829.829.730.332.437.144.74745.141.938.1
PM10 (µg/m³)37.633.930.928.927.927.72935.438.837.838.939.237.436.135.234.235.23843.351.853.952.249.245.3
Ozone (O₃) (µg/m³)697477777471645759771041291501681771731581371026032324660
NO₂ (µg/m³)62.851.242.537.735.736.44250.25448.83931.327.22526.631.940.955.382.2114.6133.2127.1107.387.6
SO₂ (µg/m³)33.130.929.328.227.828.230.233.235.436.236.336.436.436.437.139.342.244.646.247.246.944.741.237.6
CO (µg/m³)201173154149154168199240263250220201205219236252270290317345360353331306

Hong Kong on the map

Data Sources & Methodology

Our weather forecasts are powered by a professional weather data provider that aggregates data from national weather services, satellite observations, radar networks, and over 80,000 weather stations worldwide. Forecast data is updated multiple times daily. We convert raw data into clear summaries — wind speed in m/s, pressure in mmHg — so you can plan your day with confidence.