SmogRank / Australia / Queensland / Ayr
Ayr, month by month
Ayr has a measured daily mean on 1,058 days since 1 January 2023. Its worst month was October 2025, at 48 US AQI (8.6 µg/m³), 734th of 2,614 cities on that month's world ranking. Its cleanest was May 2024, at 22 US AQI (4.0 µg/m³). 2025 averaged 36 US AQI (6.5 µg/m³), against 27 US AQI (4.8 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
Months without a mean, and why
15 months
| Month | Why |
|---|---|
| Oct 2026 | 3 of 12 days measured; a month needs 9. The others: 7 with no readings from the monitor, 1 with readings for part of the day (a day needs 18 hours), 1 with under 18 hours of readings or readings that failed our checks. |
| Sep 2026 | No day measured. The others: 30 with readings for part of the day (a day needs 18 hours). |
| Aug 2026 | No day measured. The others: 31 with readings for part of the day (a day needs 18 hours). |
| Jul 2026 | 11 of 31 days measured; a month needs 22. The others: 18 with readings for part of the day (a day needs 18 hours), 2 with under 18 hours of readings or readings that failed our checks. |
| Mar 2025 | No day measured. The others: 31 with readings left out by our checks. |
| Feb 2025 | 5 of 28 days measured; a month needs 20. The others: 2 with readings for part of the day (a day needs 18 hours), 21 with readings left out by our checks. |
| Mar 2024 | 21 of 31 days measured; a month needs 22. The others: 10 with readings for part of the day (a day needs 18 hours). |
| Feb 2024 | 8 of 29 days measured; a month needs 21. The others: 1 with no readings from the monitor, 19 with readings left out by our checks, 1 missing from OpenAQ's archive. |
| Oct 2023 | 20 of 31 days measured; a month needs 22. The others: 11 with readings for part of the day (a day needs 18 hours). |
| Jul 2023 | 18 of 31 days measured; a month needs 22. The others: 1 with no readings from the monitor, 11 with readings for part of the day (a day needs 18 hours), 1 missing from OpenAQ's archive. |
| Jun 2023 | 11 of 30 days measured; a month needs 21. The others: 19 with readings for part of the day (a day needs 18 hours). |
| May 2023 | 17 of 31 days measured; a month needs 22. The others: 14 with readings for part of the day (a day needs 18 hours). |
| Apr 2023 | 19 of 30 days measured; a month needs 21. The others: 1 with no readings from the monitor, 8 with readings for part of the day (a day needs 18 hours), 2 missing from OpenAQ's archive. |
| Mar 2023 | 9 of 31 days measured; a month needs 22. The others: 3 with readings for part of the day (a day needs 18 hours), 19 missing from OpenAQ's archive. |
| Feb 2023 | 2 of 28 days measured; a month needs 20. The others: 1 with readings for part of the day (a day needs 18 hours), 25 missing from OpenAQ's archive. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Ayr's worst months
| Month | US AQI | World rank |
|---|---|---|
| October 2025 | 488.6 µg/m³ | 734thof 2,614 |
| September 2025 | 448.0 µg/m³ | 1,244thof 3,104 |
| November 2025 | 427.5 µg/m³ | 1,691stof 2,715 |
| August 2025 | 417.3 µg/m³ | 2,059thof 2,901 |
| September 2024 | 407.2 µg/m³ | 1,100thof 2,010 |
| September 2023 | 397.1 µg/m³ | 1,467thof 2,176 |
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.
Ayr's worst days
| Day | US AQI |
|---|---|
| 9 Oct 2023 | 7421.7 µg/m³ |
| 29 Oct 2023 | 7119.9 µg/m³ |
| 28 Oct 2023 | 6818.2 µg/m³ |
| 30 Aug 2025 | 6818.1 µg/m³ |
| 4 Oct 2025 | 6617.3 µg/m³ |
| 4 Nov 2025 | 6215.2 µg/m³ |
| 5 Nov 2025 | 6114.7 µg/m³ |
| 11 Sept 2023 | 6014.1 µg/m³ |
| 16 Oct 2025 | 6014.1 µg/m³ |
| 11 Dec 2023 | 6014.0 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, Ayr, Australia, 1 Jan 2023 – 5 Oct 2026. Monitor data from Queensland Government, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/au/ayr/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.
Ayr now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 22:07 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).