SmogRank / Greece / Attica / Athens
Athens, month by month
Athens has a measured daily mean on 1,012 days since 1 January 2023. Its worst month was January 2023, at 86 US AQI (27.8 µg/m³), 76th of 1,261 cities on that month's world ranking. Its cleanest was August 2025, at 45 US AQI (8.1 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
17 months
| Month | Why |
|---|---|
| Oct 2026 | 7 of 11 days measured; a month needs 8. The others: 4 with readings for part of the day (a day needs 18 hours). |
| Sep 2026 | 16 of 30 days measured; a month needs 21. The others: 14 with readings for part of the day (a day needs 18 hours). |
| Aug 2026 | 16 of 31 days measured; a month needs 22. The others: 15 with under 18 hours of readings or readings that failed our checks. |
| Jul 2026 | 13 of 31 days measured; a month needs 22. The others: 18 with under 18 hours of readings or readings that failed our checks. |
| Jun 2026 | 19 of 30 days measured; a month needs 21. The others: 11 with under 18 hours of readings or readings that failed our checks. |
| Nov 2025 | 7 of 30 days measured; a month needs 21. The others: 23 with under 18 hours of readings or readings that failed our checks. |
| Oct 2025 | 6 of 31 days measured; a month needs 22. The others: 25 with under 18 hours of readings or readings that failed our checks. |
| Jun 2025 | 18 of 30 days measured; a month needs 21. The others: 12 with under 18 hours of readings or readings that failed our checks. |
| Apr 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. |
| Jan 2025 | 20 of 31 days measured; a month needs 22. The others: 11 with under 18 hours of readings or readings that failed our checks. |
| Dec 2024 | 19 of 31 days measured; a month needs 22. The others: 12 with under 18 hours of readings or readings that failed our checks. |
| Nov 2024 | 16 of 30 days measured; a month needs 21. The others: 14 with under 18 hours of readings or readings that failed our checks. |
| Oct 2024 | No day measured. The others: 31 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 | 14 of 31 days measured; a month needs 22. The others: 17 with under 18 hours of readings or readings that failed our checks. |
| Jul 2024 | 19 of 31 days measured; a month needs 22. The others: 12 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. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Athens's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| January 2023 | 8627.8 µg/m³ | 76thof 1,261 | Eastern Europe, January 2023 |
| December 2023 | 8326.2 µg/m³ | 86thof 2,247 | South-eastern Europe, 28 December 2023 to 1 January 2024 |
| February 2023 | 8225.8 µg/m³ | 45thof 1,129 | Europe, 6 to 25 February 2023 |
| January 2024 | 7421.2 µg/m³ | 236thof 2,385 | South-eastern Europe, 28 December 2023 to 1 January 2024 |
| February 2024 | 7421.2 µg/m³ | 184thof 2,486 | South-eastern Europe, February 2024 |
| October 2023 | 6818.4 µg/m³ | 80thof 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.
Athens's worst days
| Day | US AQI | Episode |
|---|---|---|
| 24 Apr 2024 | 16981.7 µg/m³ | – |
| 1 Jan 2025 | 16980.7 µg/m³ | Europe, 24 December 2024 to 3 January 2025 |
| 1 Jan 2024 | 15460.3 µg/m³ | South-eastern Europe, 28 December 2023 to 1 January 2024 |
| 17 Feb 2023 | 15055.4 µg/m³ | Europe, 6 to 25 February 2023 |
| 1 Jan 2023 | 14955.0 µg/m³ | Eastern Europe, January 2023 |
| 3 Jan 2023 | 14954.8 µg/m³ | Eastern Europe, January 2023 |
| 16 Feb 2023 | 14854.7 µg/m³ | Europe, 6 to 25 February 2023 |
| 4 Jan 2023 | 14453.0 µg/m³ | Eastern Europe, January 2023 |
| 15 Feb 2026 | 13950.8 µg/m³ | – |
| 9 Jan 2023 | 13549.3 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, Athens, Greece, 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/gr/athens/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.
Athens now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 18:07 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).