SmogRank / Australia / New South Wales / Newcastle
Newcastle, month by month
Newcastle has a measured daily mean on 1,379 days since 1 January 2023. Its worst month was December 2025, at 55 US AQI (11.0 µg/m³), 1,131st of 3,006 cities on that month's world ranking. Its cleanest was May 2025, at 32 US AQI (5.7 µg/m³). 2025 averaged 41 US AQI (7.4 µg/m³), against 41 US AQI (7.4 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
Newcastle's worst months
| Month | US AQI | World rank |
|---|---|---|
| December 2025 | 5511.0 µg/m³ | 1,131stof 3,006 |
| September 2023 | 5310.1 µg/m³ | 579thof 2,176 |
| February 2026 | 529.8 µg/m³ | 1,455thof 2,866 |
| June 2023 | 498.9 µg/m³ | 961stof 1,603 |
| September 2025 | 498.9 µg/m³ | 918thof 3,104 |
| July 2023 | 488.7 µg/m³ | 794thof 1,432 |
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.
Newcastle's worst days
| Day | US AQI |
|---|---|
| 9 Dec 2025 | 11039.0 µg/m³ |
| 1 Feb 2026 | 10838.5 µg/m³ |
| 31 Jan 2026 | 10738.1 µg/m³ |
| 6 Dec 2025 | 9432.3 µg/m³ |
| 5 Dec 2025 | 8728.3 µg/m³ |
| 25 Sept 2024 | 8024.4 µg/m³ |
| 19 Nov 2025 | 7823.4 µg/m³ |
| 7 Feb 2026 | 7622.3 µg/m³ |
| 18 Sept 2023 | 7220.2 µg/m³ |
| 8 Dec 2025 | 7120.0 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, Newcastle, 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/newcastle/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.
Newcastle now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 23:07 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).