SmogRank / France / Île-de-France / Fontainebleau
Fontainebleau, month by month
Fontainebleau has a measured daily mean on 908 days since 11 January 2023. Its worst month was February 2023, at 58 US AQI (13.1 µg/m³), 472nd of 1,129 cities on that month's world ranking. Its cleanest was August 2023, at 19 US AQI (3.5 µg/m³). 2025 averaged 35 US AQI (6.3 µg/m³), against 37 US AQI (6.6 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 | 18 of 30 days measured; a month needs 21. The others: 12 with under 18 hours of readings or readings that failed our checks. |
| Oct 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 | 18 of 30 days measured; a month needs 21. The others: 12 with under 18 hours of readings or readings that failed our checks. |
| Feb 2025 | 4 of 28 days measured; a month needs 20. The others: 24 with under 18 hours of readings or readings that failed our checks. |
| Jan 2025 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Dec 2024 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Nov 2024 | No day measured. The others: 30 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 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Jul 2024 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Jun 2024 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| May 2024 | No day measured. The others: 31 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. |
| Jan 2023 | 10 of 31 days measured; a month needs 22. 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.
Fontainebleau's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| February 2023 | 5813.1 µg/m³ | 472ndof 1,129 | Europe, 28 February to 4 March 2023 Europe, 6 to 25 February 2023 |
| July 2026 | 5611.6 µg/m³ | 974thof 2,784 | – |
| March 2025 | 5511.2 µg/m³ | 1,366thof 2,862 | Europe, March 2025 |
| March 2026 | 5410.5 µg/m³ | 1,539thof 2,971 | Europe, 18 to 25 March 2026 |
| January 2024 | 529.5 µg/m³ | 949thof 2,385 | Europe, 8 to 27 January 2024 |
| March 2023 | 519.2 µg/m³ | 326thof 911 | Europe, 28 February to 4 March 2023 |
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.
Fontainebleau's worst days
| Day | US AQI | Episode |
|---|---|---|
| 14 Jul 2026 | 17792.4 µg/m³ | – |
| 16 Jul 2026 | 15561.5 µg/m³ | – |
| 10 Feb 2023 | 10537.2 µg/m³ | Europe, 6 to 25 February 2023 |
| 25 Mar 2025 | 9733.7 µg/m³ | Europe, March 2025 |
| 3 Mar 2023 | 9432.1 µg/m³ | Europe, 28 February to 4 March 2023 |
| 15 Jul 2026 | 9231.1 µg/m³ | – |
| 11 Feb 2023 | 8828.9 µg/m³ | Europe, 6 to 25 February 2023 |
| 14 Feb 2023 | 8627.7 µg/m³ | Europe, 6 to 25 February 2023 |
| 2 Mar 2023 | 8527.2 µg/m³ | Europe, 28 February to 4 March 2023 |
| 21 Mar 2026 | 8527.2 µg/m³ | Europe, 18 to 25 March 2026 |
Daily means, the highest since 11 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, Fontainebleau, France, 11 Jan 2023 – 11 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/fr/fontainebleau/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.
Fontainebleau 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).