SmogRank / France / Bourgogne-Franche-Comté / Chalon-sur-Saône

Chalon-sur-Saône, month by month

Chalon-sur-Saône has a measured daily mean on 386 days since 11 January 2023. Its worst month was January 2024, at 72 US AQI (20.3 µg/m³), 263rd of 2,385 cities on that month's world ranking. Its cleanest was August 2023, at 32 US AQI (5.8 µg/m³).

Every month since 2023

2026too few days for a mean (a year needs 200)14 days measured
Jan4 daysFebnoneMarnoneAprnoneMay2 daysJun1 dayJulnoneAugnoneSep1 dayOct6 days
2025too few days for a mean (a year needs 256)0 days measured
JannoneFebnoneMarnoneAprnoneMaynoneJunnoneJulnoneAugnoneSepnoneOctnoneNovnoneDecnone
2024too few days for a mean (a year needs 257)60 days measured
Jan72#263Feb47#991Mar10 daysApr2 daysMaynoneJunnoneJulnoneAugnoneSepnoneOctnoneNovnoneDecnone
202349 for the year312 days measured688th of 1,355 in the world
Jan10 daysFeb72#130Mar54#206Apr41#957May50#664Jun50#950Jul32#1,121Aug32#1,683Sep42#1,278Oct37#1,264Nov39#1,408Dec52#824
Each square is a month's mean PM2.5 in US AQI from Chalon-sur-Saône's measured days, with its place on that month's world ranking under it. A month has a mean once 70% of its days are measured, the rule the monthly rankings use; under that, the square gives the days measured. Each square opens that month's ranking with Chalon-sur-Saône marked; each year, the year's.
Good0–50
Moderate51–100
Unhealthy for sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

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

33 months
MonthWhy
Oct 20266 of 12 days measured; a month needs 9. The others: 6 with readings for part of the day (a day needs 18 hours).
Sep 20261 of 30 days measured; a month needs 21. The others: 29 with readings for part of the day (a day needs 18 hours).
Aug 2026No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jul 2026No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jun 20261 of 30 days measured; a month needs 21. The others: 29 with under 18 hours of readings or readings that failed our checks.
May 20262 of 31 days measured; a month needs 22. The others: 29 with under 18 hours of readings or readings that failed our checks.
Apr 2026No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Mar 2026No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Feb 2026No day measured. The others: 28 with under 18 hours of readings or readings that failed our checks.
Jan 20264 of 31 days measured; a month needs 22. The others: 27 with under 18 hours of readings or readings that failed our checks.
Dec 2025No day measured.
Nov 2025No day measured.
Oct 2025No day measured.
Sep 2025No day measured.
Aug 2025No day measured.
Jul 2025No day measured.
Jun 2025No day measured.
May 2025No day measured.
Apr 2025No day measured.
Mar 2025No day measured.
Feb 2025No day measured.
Jan 2025No day measured.
Dec 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Nov 2024No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Oct 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Sep 2024No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Aug 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jul 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jun 2024No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
May 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Apr 20242 of 30 days measured; a month needs 21. The others: 28 with under 18 hours of readings or readings that failed our checks.
Mar 202410 of 31 days measured; a month needs 22. The others: 21 with under 18 hours of readings or readings that failed our checks.
Jan 202310 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.

Chalon-sur-Saône's worst months

MonthUS AQIDays measuredWorld rankEpisode
January 2024 7220.3 µg/m³25 of 31263rdof 2,385Europe, 27 January to 2 February 2024
Europe, 8 to 27 January 2024and 1 more
February 2023 7220.2 µg/m³24 of 28130thof 1,129Europe, 28 February to 4 March 2023
Europe, 6 to 25 February 2023
March 2023 5410.9 µg/m³31 of 31206thof 911Europe, 4 to 7 March 2023
Europe, 28 February to 4 March 2023
December 2023 529.5 µg/m³31 of 31824thof 2,247–
May 2023 509.0 µg/m³31 of 31664thof 1,600–
June 2023 509.0 µg/m³25 of 30950thof 1,603–

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.

Chalon-sur-Saône's worst days

DayUS AQIEpisode
14 Feb 2023 15256.9 µg/m³Europe, 6 to 25 February 2023
13 Jan 2024 12645.6 µg/m³Europe, 8 to 27 January 2024
12 Jan 2024 12043.4 µg/m³Europe, 8 to 27 January 2024
13 Feb 2023 11741.9 µg/m³Europe, 6 to 25 February 2023
14 Jan 2024 11039.3 µg/m³Europe, 8 to 27 January 2024
Western Europe, January 2024
15 Feb 2023 11039.2 µg/m³Europe, 6 to 25 February 2023
10 Feb 2023 10637.4 µg/m³Europe, 6 to 25 February 2023
11 Feb 2023 10436.9 µg/m³Europe, 6 to 25 February 2023
3 Mar 2023 10436.8 µg/m³Europe, 28 February to 4 March 2023
11 Jan 2024 10436.6 µg/m³Europe, 8 to 27 January 2024

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, Chalon-sur-Saône, France, 11 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/chalon-sur-saone/history (accessed 13 Oct 2026).

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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.

Chalon-sur-Saône now: the last 24 hours, its ranks today and the last 12 months day by day.

Updated 2026-10-13 04:07 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).