SmogRank / Ireland / Munster / Cork
Cork, month by month
Cork has a measured daily mean on 880 days since 1 January 2023. Its worst month was January 2025, at 60 US AQI (14.1 µg/m³), 539th of 2,474 cities on that month's world ranking. Its cleanest was July 2024, at 18 US AQI (3.3 µg/m³).
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
21 months
| Month | Why |
|---|---|
| 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. |
| Mar 2026 | 4 of 31 days measured; a month needs 22. The others: 27 with under 18 hours of readings or readings that failed our checks. |
| Feb 2026 | 1 of 28 days measured; a month needs 20. The others: 27 with under 18 hours of readings or readings that failed our checks. |
| Jan 2026 | 4 of 31 days measured; a month needs 22. The others: 27 with under 18 hours of readings or readings that failed our checks. |
| Dec 2025 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Nov 2025 | No day measured. The others: 30 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 | 20 of 30 days measured; a month needs 21. The others: 10 with under 18 hours of readings or readings that failed our checks. |
| Jul 2025 | 19 of 31 days measured; a month needs 22. The others: 12 with under 18 hours of readings or readings that failed our checks. |
| Jun 2025 | 12 of 30 days measured; a month needs 21. The others: 18 with under 18 hours of readings or readings that failed our checks. |
| May 2025 | 18 of 31 days measured; a month needs 22. The others: 13 with under 18 hours of readings or readings that failed our checks. |
| Apr 2025 | 13 of 30 days measured; a month needs 21. The others: 17 with under 18 hours of readings or readings that failed our checks. |
| Mar 2025 | 16 of 31 days measured; a month needs 22. The others: 15 with under 18 hours of readings or readings that failed our checks. |
| Oct 2024 | 9 of 31 days measured; a month needs 22. The others: 22 with under 18 hours of readings or readings that failed our checks. |
| Sep 2024 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| Aug 2024 | 11 of 31 days measured; a month needs 22. The others: 20 with under 18 hours of readings or readings that failed our checks. |
| Mar 2024 | 15 of 31 days measured; a month needs 22. The others: 16 with under 18 hours of readings or readings that failed our checks. |
| Nov 2023 | 7 of 30 days measured; a month needs 21. The others: 23 with under 18 hours of readings or readings that failed our checks. |
| Mar 2023 | 11 of 31 days measured; a month needs 22. The others: 20 missing from OpenAQ's archive. |
| Feb 2023 | 2 of 28 days measured; a month needs 20. The others: 25 missing from OpenAQ's archive, 1 with under 18 hours of readings or readings that failed our checks. |
| Jan 2023 | 20 of 31 days measured; a month needs 22. The others: 7 missing from OpenAQ's archive, 4 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.
Cork's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| January 2025 | 6014.1 µg/m³ | 539thof 2,474 | Western Europe, January 2025 |
| January 2024 | 5913.2 µg/m³ | 590thof 2,385 | – |
| December 2023 | 529.7 µg/m³ | 769thof 2,247 | France, Belgium and 2 more countries, November and December 2023 |
| February 2025 | 519.1 µg/m³ | 1,327thof 2,633 | – |
| November 2024 | 498.8 µg/m³ | 1,126thof 2,624 | – |
| April 2026 | 437.7 µg/m³ | 1,691stof 2,941 | – |
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.
Cork's worst days
| Day | US AQI | Episode |
|---|---|---|
| 2 Dec 2023 | 14553.3 µg/m³ | France, Belgium and 2 more countries, November and December 2023 |
| 16 Jan 2024 | 10236.0 µg/m³ | – |
| 9 Jan 2025 | 9834.1 µg/m³ | Western Europe, January 2025 |
| 4 Jan 2025 | 9432.1 µg/m³ | – |
| 3 Dec 2023 | 9331.9 µg/m³ | – |
| 7 Jan 2024 | 9331.8 µg/m³ | – |
| 8 Mar 2024 | 9029.9 µg/m³ | – |
| 3 Jan 2025 | 8829.0 µg/m³ | – |
| 9 Mar 2024 | 8527.5 µg/m³ | – |
| 1 Dec 2023 | 8426.8 µg/m³ | France, Belgium and 2 more countries, November and December 2023 |
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, Cork, Ireland, 1 Jan 2023 – 11 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/ie/cork/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.
Cork 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).