SmogRank / Nigeria / Lagos / Lagos

Lagos, month by month

Lagos has a measured daily mean on 777 days since 1 January 2023. Its worst month was December 2023, at 166 US AQI (76.9 µg/m³), 17th of 2,247 cities on that month's world ranking. Its cleanest was August 2024, at 55 US AQI (11.1 µg/m³).

Every month since 2023

202693 so far284 days measured167th of 2,791 in the world
Jan138#39Feb109#158Mar88#312Apr80#314May85#198Jun93#132Jul94#110Aug89#115Sep80#187Oct90#37
2025too few days for a mean (a year needs 256)177 days measured
Jan13 daysFeb11 daysMarnoneAprnoneMaynoneJun1 dayJul11 daysAug19 daysSep85#117Oct88#205Nov97#236Dec110#257
2024too few days for a mean (a year needs 257)103 days measured
Jan1 dayFebnoneMarnoneAprnoneMaynoneJunnoneJul8 daysAug55#433Sep55#322Oct60#301Nov4 daysDecnone
2023too few days for a mean (a year needs 256)213 days measured
Jan1 dayFebnoneMar10 daysApr64#153May60#163Jun61#400Jul58#294Aug55#426Sep56#335Oct4 daysNovnoneDec166#17
Each square is a month's mean PM2.5 in US AQI from Lagos'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 Lagos 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

22 months
MonthWhy
Aug 202519 of 31 days measured; a month needs 22. The others: 12 with under 18 hours of readings or readings that failed our checks.
Jul 202511 of 31 days measured; a month needs 22. The others: 20 with under 18 hours of readings or readings that failed our checks.
Jun 20251 of 30 days measured; a month needs 21. The others: 29 with under 18 hours of readings or readings that failed our checks.
May 2025No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Apr 2025No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Mar 2025No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Feb 202511 of 28 days measured; a month needs 20. The others: 17 with under 18 hours of readings or readings that failed our checks.
Jan 202513 of 31 days measured; a month needs 22. The others: 18 with under 18 hours of readings or readings that failed our checks.
Dec 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Nov 20244 of 30 days measured; a month needs 21. The others: 26 with under 18 hours of readings or readings that failed our checks.
Jul 20248 of 31 days measured; a month needs 22. The others: 23 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 2024No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Mar 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Feb 2024No day measured. The others: 1 missing from OpenAQ's archive, 28 with under 18 hours of readings or readings that failed our checks.
Jan 20241 of 31 days measured; a month needs 22. The others: 30 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 20234 of 31 days measured; a month needs 22. The others: 27 with under 18 hours of readings or readings that failed our checks.
Mar 202310 of 31 days measured; a month needs 22. The others: 20 missing from OpenAQ's archive, 1 with under 18 hours of readings or readings that failed our checks.
Feb 2023No day measured. The others: 25 missing from OpenAQ's archive, 3 with under 18 hours of readings or readings that failed our checks.
Jan 20231 of 31 days measured; a month needs 22. The others: 7 missing from OpenAQ's archive, 23 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.

Lagos's worst months

MonthUS AQIDays measuredWorld rank
December 2023 16676.9 µg/m³27 of 3117thof 2,247
January 2026 13850.6 µg/m³31 of 3139thof 2,617
December 2025 11039.1 µg/m³31 of 31257thof 3,006
February 2026 10938.9 µg/m³28 of 28158thof 2,866
November 2025 9733.9 µg/m³30 of 30236thof 2,715
July 2026 9432.0 µg/m³31 of 31110thof 2,784

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.

Lagos's worst days

DayUS AQI
1 Jan 2023 500+357.0 µg/m³
16 Dec 2023 220145.0 µg/m³
15 Dec 2023 209134.0 µg/m³
17 Dec 2023 203128.0 µg/m³
14 Dec 2023 191112.0 µg/m³
22 Dec 2023 189110.0 µg/m³
29 Dec 2023 186105.0 µg/m³
18 Dec 2023 184102.0 µg/m³
25 Dec 2023 183101.0 µg/m³
30 Dec 2023 17996.1 µg/m³

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, Lagos, Nigeria, 1 Jan 2023 – 11 Oct 2026. Monitor data from AirGradient, IQAir, Miri Africa and 2 other networks via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/ng/lagos/history (accessed 12 Oct 2026). Contains readings from Aurassure, no reuse terms published.

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.

Lagos 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).