SmogRank / Switzerland / Ticino / Lugano
Lugano, month by month
Lugano has a measured daily mean on 1,019 days since 1 January 2023. Its worst month was February 2025, at 69 US AQI (18.9 µg/m³), 640th of 2,633 cities on that month's world ranking. Its cleanest was September 2025, at 23 US AQI (4.2 µg/m³). 2025 averaged 49 US AQI (8.9 µg/m³), against 43 US AQI (7.8 µg/m³) in 2023.
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
11 months
| Month | Why |
|---|---|
| Jun 2026 | 12 of 30 days measured; a month needs 21. The others: 18 with under 18 hours of readings or readings that failed our checks. |
| Jun 2025 | 19 of 30 days measured; a month needs 21. The others: 11 with under 18 hours of readings or readings that failed our checks. |
| Oct 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. |
| Sep 2024 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| Aug 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. |
| Jun 2024 | 5 of 30 days measured; a month needs 21. The others: 25 with under 18 hours of readings or readings that failed our checks. |
| Apr 2024 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| Mar 2024 | 10 of 31 days measured; a month needs 22. The others: 21 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 | 8 of 31 days measured; a month needs 22. The others: 7 missing from OpenAQ's archive, 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.
Lugano's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| February 2025 | 6918.9 µg/m³ | 640thof 2,633 | Europe, 14 February to 1 March 2025 |
| March 2026 | 6516.6 µg/m³ | 728thof 2,971 | Europe, 1 to 12 March 2026 |
| January 2026 | 6315.6 µg/m³ | 725thof 2,617 | Europe, January and February 2026 Eastern Europe, January 2026 |
| February 2026 | 6114.4 µg/m³ | 815thof 2,866 | Europe, January and February 2026 |
| January 2024 | 5812.8 µg/m³ | 620thof 2,385 | Italy, Switzerland and France, January 2024 |
| October 2025 | 5712.2 µg/m³ | 437thof 2,614 | – |
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.
Lugano's worst days
| Day | US AQI | Episode |
|---|---|---|
| 25 Feb 2026 | 12244.1 µg/m³ | – |
| 5 Mar 2026 | 12043.1 µg/m³ | Europe, 1 to 12 March 2026 |
| 2 Feb 2026 | 10838.4 µg/m³ | Europe, January and February 2026 |
| 22 Feb 2024 | 10637.7 µg/m³ | Italy, Switzerland and France, February 2024 |
| 1 Mar 2026 | 10637.6 µg/m³ | Europe, 1 to 12 March 2026 |
| 28 Feb 2026 | 10436.7 µg/m³ | – |
| 26 Jan 2024 | 10336.2 µg/m³ | Italy, Switzerland and France, January 2024 |
| 18 Feb 2025 | 10035.2 µg/m³ | Europe, 14 February to 1 March 2025 |
| 16 Jan 2026 | 9935.1 µg/m³ | Europe, January and February 2026 |
| 11 Mar 2026 | 9935.0 µg/m³ | Europe, 1 to 12 March 2026 |
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, Lugano, Switzerland, 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/ch/lugano/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.
Lugano now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 19:07 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).