SmogRank / France / Auvergne-Rhône-Alpes / Montluçon

Montluçon, month by month

Montluçon has a measured daily mean on 750 days since 11 January 2023. Its worst month was February 2023, at 60 US AQI (13.9 µg/m³), 422nd of 1,129 cities on that month's world ranking. Its cleanest was September 2026, at 22 US AQI (4.0 µg/m³).

Every month since 2023

202636 so far259 days measured2,399th of 2,791 in the world
Jan42#1,644Feb26#2,634Mar47#2,035Apr28#2,496May29#2,249Jun18 daysJul53#1,280Aug34#2,434Sep22#2,736Oct28#2,162
202539 for the year300 days measured2,057th of 2,681 in the world
Jan21 daysFeb57#993Mar48#1,842Apr28#2,558May21 daysJun19 daysJul29#2,571Aug37#2,290Sep23#2,893Oct20 daysNov34#2,121Dec52#1,458
2024too few days for a mean (a year needs 257)135 days measured
Jan3 daysFeb43#1,168Mar10 daysApr2 daysMay1 dayJun2 daysJul30#2,159Aug14 daysSepnoneOct12 daysNov52#974Dec14 days
2023too few days for a mean (a year needs 256)56 days measured
Jan7 daysFeb60#422Mar20 daysApr3 daysMaynoneJunnoneJul1 dayAugnoneSepnoneOctnoneNovnoneDecnone
Each square is a month's mean PM2.5 in US AQI from Montluçon'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 Montluçon marked; each year, the year's. A dashed square is the running month, so far.
Good0–50
Moderate51–100
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

25 months
MonthWhy
Jun 202618 of 30 days measured; a month needs 21. The others: 12 with under 18 hours of readings or readings that failed our checks.
Oct 202520 of 31 days measured; a month needs 22. The others: 11 with under 18 hours of readings or readings that failed our checks.
Jun 202519 of 30 days measured; a month needs 21. The others: 11 with under 18 hours of readings or readings that failed our checks.
May 202521 of 31 days measured; a month needs 22. The others: 10 with under 18 hours of readings or readings that failed our checks.
Jan 202521 of 31 days measured; a month needs 22. The others: 10 with under 18 hours of readings or readings that failed our checks.
Dec 202414 of 31 days measured; a month needs 22. The others: 17 with under 18 hours of readings or readings that failed our checks.
Oct 202412 of 31 days measured; a month needs 22. The others: 19 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 202414 of 31 days measured; a month needs 22. The others: 17 with under 18 hours of readings or readings that failed our checks.
Jun 20242 of 30 days measured; a month needs 21. The others: 28 with under 18 hours of readings or readings that failed our checks.
May 20241 of 31 days measured; a month needs 22. The others: 30 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 20243 of 31 days measured; a month needs 22. The others: 28 with under 18 hours of readings or readings that failed our checks.
Dec 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Nov 2023No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Oct 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Sep 2023No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Aug 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jul 20231 of 31 days measured; a month needs 22. The others: 30 with under 18 hours of readings or readings that failed our checks.
Jun 2023No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
May 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Apr 20233 of 30 days measured; a month needs 21. The others: 27 with under 18 hours of readings or readings that failed our checks.
Mar 202320 of 31 days measured; a month needs 22. The others: 11 with under 18 hours of readings or readings that failed our checks.
Jan 20237 of 31 days measured; a month needs 22. The others: 14 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.

Montluçon's worst months

MonthUS AQIDays measuredWorld rankEpisode
February 2023 6013.9 µg/m³25 of 28422ndof 1,129Europe, 28 February to 4 March 2023
Europe, 6 to 25 February 2023
February 2025 5712.4 µg/m³23 of 28993rdof 2,633Europe, 14 February to 1 March 2025
Europe, 1 to 14 February 2025
July 2026 5310.3 µg/m³31 of 311,280thof 2,784France, July 2026
December 2025 529.5 µg/m³29 of 311,458thof 3,006–
November 2024 529.4 µg/m³24 of 30974thof 2,624–
March 2025 488.6 µg/m³26 of 311,842ndof 2,862Germany, Poland and 25 more countries, March 2025
Europe, 14 February to 1 March 2025

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.

Montluçon's worst days

DayUS AQIEpisode
25 Jul 2026 15357.9 µg/m³France, July 2026
26 Jul 2026 13348.5 µg/m³France, July 2026
4 Mar 2023 12545.4 µg/m³Europe, 4 to 7 March 2023
Europe, 28 February to 4 March 2023
3 Mar 2023 11942.8 µg/m³Europe, 28 February to 4 March 2023
2 Mar 2023 11541.2 µg/m³Europe, 28 February to 4 March 2023
12 Feb 2023 10436.7 µg/m³Europe, 6 to 25 February 2023
20 Jan 2025 10135.6 µg/m³Germany, France and 19 more countries, January 2025
11 Feb 2023 9532.6 µg/m³Europe, 6 to 25 February 2023
5 Mar 2023 9130.4 µg/m³Europe, 4 to 7 March 2023
18 Jan 2025 8828.9 µg/m³Germany, France and 19 more countries, January 2025

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, Montluçon, 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/montlucon/history (accessed 12 Oct 2026).

Download chart (PNG)

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.

Montluçon now: the last 24 hours, its ranks today and the last 12 months day by day.

Updated 2026-10-12 18:07 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).