SmogRank / France / Grand Est / Thionville
Thionville, month by month
Thionville has a measured daily mean on 983 days since 1 January 2023. Its worst month was February 2025, at 68 US AQI (18.2 µg/m³), 685th of 2,633 cities on that month's world ranking. Its cleanest was September 2025, at 23 US AQI (4.1 µg/m³). 2025 averaged 52 US AQI (9.4 µg/m³), against 49 US AQI (8.8 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
16 months
| Month | Why |
|---|---|
| Jun 2026 | 14 of 30 days measured; a month needs 21. The others: 16 with under 18 hours of readings or readings that failed our checks. |
| Apr 2026 | 17 of 30 days measured; a month needs 21. The others: 13 with under 18 hours of readings or readings that failed our checks. |
| Feb 2026 | 19 of 28 days measured; a month needs 20. The others: 9 with under 18 hours of readings or readings that failed our checks. |
| Jan 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. |
| Oct 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. |
| Aug 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. |
| 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 | 17 of 31 days measured; a month needs 22. The others: 14 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 | 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 2024 | 2 of 30 days measured; a month needs 21. The others: 28 with under 18 hours of readings or readings that failed our checks. |
| May 2024 | 1 of 31 days measured; a month needs 22. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| Apr 2024 | 2 of 30 days measured; a month needs 21. The others: 28 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. |
| Feb 2023 | 9 of 28 days measured; a month needs 20. The others: 19 missing from OpenAQ's archive. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Thionville's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| February 2025 | 6818.2 µg/m³ | 685thof 2,633 | Europe, 14 February to 1 March 2025 Europe, 1 to 14 February 2025 |
| March 2025 | 6014.0 µg/m³ | 1,031stof 2,862 | Germany, Poland and 25 more countries, March 2025 Europe, 14 February to 1 March 2025 |
| January 2024 | 5913.6 µg/m³ | 561stof 2,385 | Europe, 28 to 31 January 2024 Europe, 8 to 27 January 2024 |
| January 2025 | 5913.3 µg/m³ | 590thof 2,474 | Germany, France and 19 more countries, January 2025 Europe, January 2025and 1 more |
| June 2023 | 5812.9 µg/m³ | 488thof 1,603 | – |
| December 2025 | 5812.7 µg/m³ | 890thof 3,006 | – |
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.
Thionville's worst days
| Day | US AQI | Episode |
|---|---|---|
| 17 Aug 2026 | 13448.8 µg/m³ | Germany, Belgium and 2 more countries, August 2026 |
| 20 Jan 2025 | 12143.6 µg/m³ | Germany, France and 19 more countries, January 2025 |
| 25 Jan 2026 | 11239.8 µg/m³ | Europe, January and February 2026 |
| 21 Jan 2025 | 10436.9 µg/m³ | Germany, France and 19 more countries, January 2025 |
| 3 Feb 2025 | 10135.6 µg/m³ | Europe, 1 to 14 February 2025 |
| 28 Dec 2024 | 9733.7 µg/m³ | Europe, 24 December 2024 to 3 January 2025 |
| 10 Feb 2025 | 9532.8 µg/m³ | Europe, 1 to 14 February 2025 |
| 22 Jan 2026 | 9532.6 µg/m³ | Europe, January and February 2026 |
| 21 Jan 2024 | 9432.1 µg/m³ | Europe, 8 to 27 January 2024 |
| 19 Jan 2025 | 9230.9 µg/m³ | Germany, France and 19 more countries, January 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, Thionville, France, 1 Jan 2023 – 12 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/fr/thionville/history (accessed 13 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.
Thionville now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-13 02:07 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).