5-day weather forecast Sydney Sep 20, 2026

22°17° · Sunny

Weather forecast Sydney tomorrow Sep 20, 2026: sunny, temperature from 17 °C to 22 °C.

Precipitation probability 6%. Wind up to 7.19 m/s (gusts 12.11 m/s). Air humidity 40–70%, atmospheric pressure 761–766 mm Hg, UV index up to 7.6.

Sunrise 05:47
Sunset 17:50
Waxing Gibbous73% illuminated
Moonrise 11:50 · Moonset 02:06
Chart
Table

Forecast from 17 °C to 22 °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)191919181817171718202122212020202121202020202020
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 (%)000000000000000000000000
Rain chance (%)233332211111223334465311

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)3.53.54.695.114.6143.814.314.613.612.893.1156.57.117.195.395.112.310.690.891.893.815.19
Wind gust (m/s)4.034.426.927.726.315.114.615.115.54.533.533.7289.512.1197.837.533.811.921.192.034.317.83
Wind direction (°)WSW 256°SW 221°SW 223°SW 229°WSW 240°WSW 258°W 279°WNW 284°WNW 290°WNW 303°NNW 334°NNE 16°NE 47°NE 52°NE 52°NE 51°NE 50°ENE 63°E 89°SE 132°W 280°WNW 302°NW 311°NW 312°

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 (%)485557595652484646444240495358595661657067564542

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)766766766765765765766766766765764764763762761761761761761762763763763762

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 Index00000000.41.53.35.57.17.66.95.131.30.3000000

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)6.36.97.78.49.210.312.414.415.812.89.27.67.17.58.68.77.96.64.84.14.26.17.47.6
PM10 (µg/m³)6.377.88.59.410.412.514.515.912.99.27.67.189.710.29.485.34.14.26.27.67.8
Ozone (O₃) (µg/m³)35353125201716192943597898114124129126108826149423837
NO₂ (µg/m³)14.815.316.818.819.918.91715.515.515.915.412.89.16.34.73.94.36.49.612.615.117.418.517.6
SO₂ (µg/m³)3.83.83.73.63.94.75.86.98.39.710.49.88.475.84.73.93.63.63.94.55.35.85.6
CO (µg/m³)919293951001121271371401391341241121031001021081261501601451179688

Sydney 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.