SmogRank / Italy / Liguria / Cairo Montenotte

Cairo Montenotte, month by month

Cairo Montenotte has a measured daily mean on 223 days since 2 January 2023. Its worst month was January 2024, at 55 US AQI (11.2 µg/m³), 775th of 2,385 cities on that month's world ranking. Its cleanest was April 2023, at 36 US AQI (6.4 µg/m³).

Every month since 2023

2026too few days for a mean (a year needs 199)0 days measured
JannoneFebnoneMarnoneAprnoneMaynoneJunnoneJulnoneAugnoneSepnoneOctnone
2025too few days for a mean (a year needs 256)0 days measured
JannoneFebnoneMarnoneAprnoneMaynoneJunnoneJulnoneAugnoneSepnoneOctnoneNovnoneDecnone
2024too few days for a mean (a year needs 257)34 days measured
Jan55#775Feb8 daysMar2 daysAprnoneMaynoneJunnoneJulnoneAugnoneSepnoneOctnoneNovnoneDecnone
2023too few days for a mean (a year needs 256)189 days measured
Jan20 daysFeb2 daysMar9 daysApr36#1,145May8 daysJunnoneJulnoneAug18 daysSep39#1,504Oct49#540Nov53#580Dec54#554
Each square is a month's mean PM2.5 in US AQI from Cairo Montenotte'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 Cairo Montenotte marked; each year, the year's.
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

40 months
MonthWhy
Oct 2026No day measured.
Sep 2026No day measured.
Aug 2026No day measured.
Jul 2026No day measured.
Jun 2026No day measured.
May 2026No day measured.
Apr 2026No day measured.
Mar 2026No day measured.
Feb 2026No day measured.
Jan 2026No day measured.
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 readings for part of the day (a day needs 18 hours).
Nov 2024No day measured. The others: 1 with no readings from the monitor, 29 with readings for part of the day (a day needs 18 hours).
Oct 2024No day measured. The others: 4 with no readings from the monitor, 27 with readings for part of the day (a day needs 18 hours).
Sep 2024No day measured. The others: 6 with no readings from the monitor, 24 with readings for part of the day (a day needs 18 hours).
Aug 2024No day measured. The others: 7 with no readings from the monitor, 24 with readings for part of the day (a day needs 18 hours).
Jul 2024No day measured. The others: 2 with no readings from the monitor, 29 with readings for part of the day (a day needs 18 hours).
Jun 2024No day measured. The others: 14 with no readings from the monitor, 16 with readings for part of the day (a day needs 18 hours).
May 2024No day measured. The others: 5 with no readings from the monitor, 26 with readings for part of the day (a day needs 18 hours).
Apr 2024No day measured. The others: 4 with no readings from the monitor, 26 with readings for part of the day (a day needs 18 hours).
Mar 20242 of 31 days measured; a month needs 22. The others: 13 with no readings from the monitor, 16 with readings for part of the day (a day needs 18 hours).
Feb 20248 of 29 days measured; a month needs 21. The others: 2 with no readings from the monitor, 18 with readings for part of the day (a day needs 18 hours), 1 missing from OpenAQ's archive.
Aug 202318 of 31 days measured; a month needs 22. The others: 10 with no readings from the monitor, 3 with readings for part of the day (a day needs 18 hours).
Jul 2023No day measured. The others: 30 with no readings from the monitor, 1 missing from OpenAQ's archive.
Jun 2023No day measured. The others: 30 with no readings from the monitor.
May 20238 of 31 days measured; a month needs 22. The others: 20 with no readings from the monitor, 3 with readings for part of the day (a day needs 18 hours).
Mar 20239 of 31 days measured; a month needs 22. The others: 2 with readings for part of the day (a day needs 18 hours), 20 missing from OpenAQ's archive.
Feb 20232 of 28 days measured; a month needs 20. The others: 1 with readings for part of the day (a day needs 18 hours), 25 missing from OpenAQ's archive.
Jan 202320 of 31 days measured; a month needs 22. The others: 4 with no readings from the monitor, 6 missing from OpenAQ's archive.

A day counts once 18 hours of it are measured; a month needs 70% of its days.

Cairo Montenotte's worst months

MonthUS AQIDays measuredWorld rank
January 2024 5511.2 µg/m³24 of 31775thof 2,385
December 2023 5410.9 µg/m³29 of 31554thof 2,247
November 2023 5310.2 µg/m³30 of 30580thof 2,243
October 2023 498.8 µg/m³23 of 31540thof 2,012
September 2023 397.0 µg/m³24 of 301,504thof 2,176
April 2023 366.4 µg/m³26 of 301,145thof 1,622

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.

Cairo Montenotte's worst days

DayUS AQI
21 Nov 2023 8527.3 µg/m³
12 Dec 2023 8326.4 µg/m³
16 Jan 2024 8024.6 µg/m³
26 Jan 2023 7421.7 µg/m³
13 Jan 2024 7220.4 µg/m³
16 Jan 2023 7120.0 µg/m³
14 Feb 2023 7119.6 µg/m³
11 Jan 2024 6818.1 µg/m³
19 Oct 2023 6717.8 µg/m³
27 Jan 2023 6617.3 µg/m³

Daily means, the highest since 2 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, Cairo Montenotte, Italy, 2 Jan 2023 – 11 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/it/cairo-montenotte/history (accessed 12 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.

Cairo Montenotte 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).