SmogRank / Australia / New South Wales / Wollongong
Wollongong, month by month
Wollongong has a measured daily mean on 1,338 days since 1 January 2023. Its worst month was December 2025, at 52 US AQI (9.9 µg/m³), 1,348th of 3,006 cities on that month's world ranking. Its cleanest was July 2024, at 24 US AQI (4.4 µg/m³). 2025 averaged 39 US AQI (7.0 µg/m³), against 38 US AQI (6.8 µg/m³) in 2024.
Every month since 2023
The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales
Wollongong's worst months
| Month | US AQI | World rank |
|---|---|---|
| December 2025 | 529.9 µg/m³ | 1,348thof 3,006 |
| September 2023 | 529.5 µg/m³ | 686thof 2,176 |
| February 2026 | 488.7 µg/m³ | 1,771stof 2,866 |
| December 2024 | 478.5 µg/m³ | 1,212thof 2,616 |
| November 2025 | 478.4 µg/m³ | 1,422ndof 2,715 |
| October 2023 | 447.9 µg/m³ | 793rdof 2,012 |
Monthly means over the days measured; finished months only. World rank: its place on that month's world ranking of every city with enough days. Each month opens that ranking.
Wollongong's worst days
| Day | US AQI |
|---|---|
| 6 Dec 2025 | 8829.0 µg/m³ |
| 13 Sept 2023 | 7823.7 µg/m³ |
| 9 Dec 2025 | 7723.0 µg/m³ |
| 14 Sept 2023 | 7622.4 µg/m³ |
| 15 Sept 2023 | 7320.8 µg/m³ |
| 3 Oct 2023 | 6818.0 µg/m³ |
| 25 Oct 2023 | 6717.6 µg/m³ |
| 12 Sept 2023 | 6717.5 µg/m³ |
| 4 Aug 2023 | 6617.1 µg/m³ |
| 31 Jan 2026 | 6617.1 µg/m³ |
Daily means, the highest since 1 Jan 2023; the WHO's daily guideline is 15 µg/m³. Each date opens that day's world ranking, and each episode the bad-air spell it was part of.
Use this history
SmogRank, PM2.5 monthly and daily means, Wollongong, Australia, 1 Jan 2023 – 12 Oct 2026. Monitor data from NSW DCCEEW, read from the publisher; sources listed at smogrank.com/sources. smogrank.com/au/wollongong/history (accessed 12 Oct 2026).
You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.
Wollongong now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 20:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index. Some low-cost readings: Sensor.Community, ODbL (data and licence). Some readings: Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Vietnam's government monitors; Aurassure; Umhverfisstofnun (Environment Agency of Iceland); RMCAB (Secretaría Distrital de Ambiente, Bogotá); Love My Air (City and County of Denver), no reuse terms published (why we use them).