SmogRank / Luxembourg / Luxembourg / Luxembourg
Luxembourg, month by month
Luxembourg has a measured daily mean on 1,109 days since 1 January 2023. Its worst month was February 2025, at 64 US AQI (15.9 µg/m³), 821st of 2,633 cities on that month's world ranking. Its cleanest was August 2023, at 28 US AQI (5.0 µg/m³). 2025 averaged 49 US AQI (8.8 µg/m³), against 43 US AQI (7.8 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
11 months
| Month | Why |
|---|---|
| Oct 2025 | 14 of 31 days measured; a month needs 22. The others: 17 with under 18 hours of readings or readings that failed our checks. |
| Jun 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. |
| May 2025 | 15 of 31 days measured; a month needs 22. The others: 16 with under 18 hours of readings or readings that failed our checks. |
| Mar 2025 | 21 of 31 days measured; a month needs 22. The others: 10 with under 18 hours of readings or readings that failed our checks. |
| Oct 2024 | 13 of 31 days measured; a month needs 22. The others: 18 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. |
| 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 | 5 of 30 days measured; a month needs 21. The others: 25 with under 18 hours of readings or readings that failed our checks. |
| Oct 2023 | 1 of 31 days measured; a month needs 22. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| Sep 2023 | 19 of 30 days measured; a month needs 21. The others: 11 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.
Luxembourg's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| February 2025 | 6415.9 µg/m³ | 821stof 2,633 | Europe, 14 February to 1 March 2025 Europe, 1 to 14 February 2025 |
| January 2026 | 6114.3 µg/m³ | 793rdof 2,617 | Europe, January and February 2026 |
| February 2023 | 6013.9 µg/m³ | 422ndof 1,129 | Europe, 6 to 25 February 2023 |
| June 2023 | 5812.6 µg/m³ | 509thof 1,603 | – |
| March 2026 | 5511.5 µg/m³ | 1,319thof 2,971 | – |
| January 2024 | 5410.8 µg/m³ | 804thof 2,385 | Europe, 8 to 27 January 2024 |
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.
Luxembourg's worst days
| Day | US AQI | Episode |
|---|---|---|
| 17 Aug 2026 | 12645.6 µg/m³ | Germany, Belgium and 2 more countries, August 2026 |
| 25 Jan 2026 | 9834.2 µg/m³ | Europe, January and February 2026 |
| 16 Aug 2026 | 9633.0 µg/m³ | Germany, Belgium and 2 more countries, August 2026 |
| 10 Feb 2023 | 9331.8 µg/m³ | Europe, 6 to 25 February 2023 |
| 10 Feb 2025 | 9331.5 µg/m³ | Europe, 1 to 14 February 2025 |
| 20 Jan 2025 | 9231.3 µg/m³ | Germany, France and 19 more countries, January 2025 |
| 21 Jan 2025 | 8627.9 µg/m³ | Germany, France and 19 more countries, January 2025 |
| 20 Jan 2024 | 8326.2 µg/m³ | Europe, 8 to 27 January 2024 |
| 22 Jan 2026 | 8226.0 µg/m³ | Europe, January and February 2026 |
| 20 Feb 2025 | 8125.1 µg/m³ | Europe, 14 February to 1 March 2025 |
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, Luxembourg, 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/lu/luxembourg/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.
Luxembourg 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).