World city
Sydney
AU
- Country
- Australia
- Population
- 4,627,345
The outline is from Natural Earth (public domain); the flag is from the flag-icons set (MIT licence).
Sydney: City population — 4,627,345 people; Urban centre population — 4,375,394 people; Urban centre density — 3,175 people per km²; Urban centre population growth, 2015–2025 — 15.9 %; Hot days (max ≥ +30 °C) — 41 days per year; Annual precipitation — 1,199 mm per year. Data for 19 of 21 connected indicators.
Strengths
Top quarter of the set, for indicators with a known direction.
- No indicators in the top quarter.
Weaknesses
Bottom quarter of the set. This compares places; it does not rate life in them.
- Severe frost (min ≤ −20 °C): 0.0 days per year
Population
| Indicator | Value | Among world cities | Period and source |
|---|---|---|---|
| City population | 4,627,345 people | by size, not rated | GeoNames snapshot (all-the-cities 3.1.0 package, 2022), exact date not stated · GeoNames, CC BY 4.0 snapshot of an open gazetteer; the exact census date is not stated |
| Urban centre population | 4,375,394 people | by size, not rated | 2025 · GHSL UCDB R2024A V1_2, EC JRC, CC BY 4.0 modelled estimate from raster data; centre boundaries differ from city boundaries GHSL urban centre “Sydney” (ID 2324) |
| Urban centre area | 1,378 km² | by size, not rated | 2025 · GHSL UCDB R2024A V1_2, EC JRC, CC BY 4.0 modelled estimate from raster data; centre boundaries differ from city boundaries GHSL urban centre “Sydney” (ID 2324) |
| Urban centre density | 3,175 people per km² | by size, not rated | 2025 · GHSL UCDB R2024A V1_2, EC JRC, CC BY 4.0 modelled estimate from raster data; centre boundaries differ from city boundaries GHSL urban centre “Sydney” (ID 2324) |
| Urban centre population growth, 2015–2025 | 15.9 % | by size, not rated | 2015–2025 · GHSL UCDB R2024A V1_2, EC JRC, CC BY 4.0 modelled estimate from raster data; centre boundaries differ from city boundaries GHSL urban centre “Sydney” (ID 2324) |
Climate and risks
| Indicator | Value | Among world cities | Period and source |
|---|---|---|---|
| Hot days (max ≥ +30 °C) | 41 days per year | 2016-2025 · NOAA GHCN-Daily measured at a single station, often at an airport; not an average for the metro area; years with incomplete data are excluded station SYDNEY AIRPORT AMO, 9.3 km from the center | |
| Frost days (min ≤ −10 °C) | 0 days per year | 2016-2025 · NOAA GHCN-Daily measured at a single station, often at an airport; not an average for the metro area; years with incomplete data are excluded station SYDNEY AIRPORT AMO, 9.3 km from the center | |
| Severe frost (min ≤ −20 °C) | 0.0 days per year | 2016-2025 · NOAA GHCN-Daily measured at a single station, often at an airport; not an average for the metro area; years with incomplete data are excluded station SYDNEY AIRPORT AMO, 9.3 km from the center | |
| Ice days (max ≤ 0 °C) | 0 days per year | by size, not rated | 2016-2025 · NOAA GHCN-Daily measured at a single station, often at an airport; not an average for the metro area; years with incomplete data are excluded station SYDNEY AIRPORT AMO, 9.3 km from the center |
| Heating degree days | 485 °C·days per year | by size, not rated | 2016-2025 · NOAA GHCN-Daily measured at a single station, often at an airport; not an average for the metro area; years with incomplete data are excluded station SYDNEY AIRPORT AMO, 9.3 km from the center |
| Cooling degree days | 950 °C·days per year | by size, not rated | 2016-2025 · NOAA GHCN-Daily measured at a single station, often at an airport; not an average for the metro area; years with incomplete data are excluded station SYDNEY AIRPORT AMO, 9.3 km from the center |
| Rainy days | 97 days per year | by size, not rated | 2016-2025 · NOAA GHCN-Daily measured at a single station, often at an airport; not an average for the metro area; years with incomplete data are excluded station SYDNEY AIRPORT AMO, 9.3 km from the center |
| Annual precipitation | 1,199 mm per year | by size, not rated | 2016-2025 · NOAA GHCN-Daily measured at a single station, often at an airport; not an average for the metro area; years with incomplete data are excluded station SYDNEY AIRPORT AMO, 9.3 km from the center |
| Daylight on December 21 | 14.4 hours | by size, not rated | December 21 and June 21 (does not depend on the year) · calculated from latitude calculation; cloud cover is not taken into account |
| Daylight on June 21 | 9.9 hours | by size, not rated | December 21 and June 21 (does not depend on the year) · calculated from latitude calculation; cloud cover is not taken into account |
| Air humidity | 69 % | by size, not rated | 2021-2025 · Meteostat (CC BY 4.0) measured at a single station; only measured values were used, years with incomplete data are excluded station Sydney Airport, 3.6 km from the center |
| Muggy days (dew point ≥ +20 °C) | 20 days per year | 2021-2025 · Meteostat (CC BY 4.0) measured at a single station; only measured values were used, years with incomplete data are excluded station Sydney Airport, 3.6 km from the center | |
| Distance to the sea | 7 km | by size, not rated | 2006-2025 · Natural Earth, USGS accuracy is limited by the map scale, on the order of a few kilometers |
| Earthquakes M4.5+ within 100 km | 0.00 per year | 2006-2025 · Natural Earth, USGS 20-year catalog: rare strong events may fall outside the window; completeness outside the US depends on the region |
Missing from the summary (2)
A gap means no data, not a zero value.
- Snowfall days (Climate and risks): The source has no value for this place.
- Strongest earthquake in the period (Climate and risks): The source has no value for this place.
City population is taken within administrative boundaries; “urban centre” figures describe the dense built-up cluster in GHSL; climate comes from the nearest weather station. These are not metro areas and are not comparable with US cities. There are no city-level quality-of-life indicators yet. Country: Australia.
Compare head to head
A winner for each indicator and category. The score counts indicators; it is not a universal rating of a place.
Nearby by country and size
Dataset version: world-cities-2026-10-20. Indicators describe territories, not people; no overall score is computed for a place.