SmogRank / Ireland / Leinster / Athlone
Athlone, month by month
Athlone has a measured daily mean on 355 days since 22 May 2025. Its worst month was March 2026, at 55 US AQI (11.4 µg/m³), 1,340th of 2,971 cities on that month's world ranking. Its cleanest was September 2026, at 29 US AQI (5.3 µg/m³).
Every month since 2025
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
7 months
| Month | Why |
|---|---|
| Aug 2026 | 21 of 31 days measured; a month needs 22. The others: 10 with under 18 hours of readings or readings that failed our checks. |
| Jun 2026 | 20 of 30 days measured; a month needs 21. The others: 10 with under 18 hours of readings or readings that failed our checks. |
| Oct 2025 | 10 of 31 days measured; a month needs 22. The others: 21 with under 18 hours of readings or readings that failed our checks. |
| Sep 2025 | 8 of 30 days measured; a month needs 21. The others: 22 with under 18 hours of readings or readings that failed our checks. |
| Jul 2025 | 17 of 31 days measured; a month needs 22. The others: 14 with under 18 hours of readings or readings that failed our checks. |
| Jun 2025 | 6 of 30 days measured; a month needs 21. The others: 24 with under 18 hours of readings or readings that failed our checks. |
| May 2025 | 3 of 31 days measured; a month needs 22. The others: 7 with under 18 hours of readings or readings that failed our checks. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Athlone's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| March 2026 | 5511.4 µg/m³ | 1,340thof 2,971 | Europe, 18 to 25 March 2026 |
| December 2025 | 5511.3 µg/m³ | 1,072ndof 3,006 | – |
| February 2026 | 5511.2 µg/m³ | 1,152ndof 2,866 | – |
| January 2026 | 519.3 µg/m³ | 1,190thof 2,617 | – |
| November 2025 | 427.5 µg/m³ | 1,691stof 2,715 | – |
| August 2025 | 397.1 µg/m³ | 2,132ndof 2,901 | – |
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.
Athlone's worst days
| Day | US AQI | Episode |
|---|---|---|
| 7 Feb 2026 | 9432.1 µg/m³ | – |
| 21 Mar 2026 | 8828.9 µg/m³ | Europe, 18 to 25 March 2026 |
| 20 Mar 2026 | 8728.6 µg/m³ | Europe, 18 to 25 March 2026 |
| 21 Dec 2025 | 7722.9 µg/m³ | – |
| 22 Dec 2025 | 7622.5 µg/m³ | – |
| 24 Jul 2025 | 7421.6 µg/m³ | – |
| 23 Dec 2025 | 7421.6 µg/m³ | – |
| 8 Feb 2026 | 7421.4 µg/m³ | – |
| 27 Aug 2026 | 7321.1 µg/m³ | – |
| 22 Mar 2026 | 7220.3 µg/m³ | Europe, 18 to 25 March 2026 |
Daily means, the highest since 22 May 2025; 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, Athlone, Ireland, 22 May 2025 – 11 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/ie/athlone/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.
Athlone now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 21:07 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).