SmogRank / Mexico / Nuevo León / García

García, month by month

García has a measured daily mean on 667 days since 16 January 2023. Its worst month was November 2025, at 84 US AQI (26.8 µg/m³), 276th of 2,715 cities on that month's world ranking. Its cleanest was September 2023, at 42 US AQI (7.6 µg/m³).

Every month since 2023

202655 so far256 days measured806th of 2,791 in the world
Jan58#879Feb58#941Mar57#1,175Apr58#678May53#737Jun49#862Jul55#996Aug54#786Sep50#787Oct6 days
2025too few days for a mean (a year needs 256)222 days measured
Jan10 daysFeb2 daysMar12 daysApr76#274May13 daysJun20 daysJul73#185Aug21 daysSep63#323Oct70#297Nov84#276Dec59#824
2024too few days for a mean (a year needs 257)45 days measured
Jan8 daysFeb6 daysMar3 daysApr9 daysMay4 daysJunnoneJul4 daysAugnoneSepnoneOct6 daysNov2 daysDec3 days
2023too few days for a mean (a year needs 256)144 days measured
Jan13 daysFeb2 daysMar10 daysApr72#108May5 daysJun2 daysJul15 daysAug10 daysSep42#1,278Oct1 dayNov57#287Dec18 days
Each square is a month's mean PM2.5 in US AQI from García'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 García 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

28 months
MonthWhy
Oct 20266 of 11 days measured; a month needs 8. The others: 5 with readings for part of the day (a day needs 18 hours).
Aug 202521 of 31 days measured; a month needs 22. The others: 10 with under 18 hours of readings or readings that failed our checks.
Jun 202520 of 30 days measured; a month needs 21. The others: 10 with under 18 hours of readings or readings that failed our checks.
May 202513 of 31 days measured; a month needs 22. The others: 18 with under 18 hours of readings or readings that failed our checks.
Mar 202512 of 31 days measured; a month needs 22. The others: 19 with under 18 hours of readings or readings that failed our checks.
Feb 20252 of 28 days measured; a month needs 20. The others: 26 with under 18 hours of readings or readings that failed our checks.
Jan 202510 of 31 days measured; a month needs 22. The others: 21 with under 18 hours of readings or readings that failed our checks.
Dec 20243 of 31 days measured; a month needs 22. The others: 28 with under 18 hours of readings or readings that failed our checks.
Nov 20242 of 30 days measured; a month needs 21. The others: 28 with under 18 hours of readings or readings that failed our checks.
Oct 20246 of 31 days measured; a month needs 22. The others: 25 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 20244 of 31 days measured; a month needs 22. The others: 27 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 20244 of 31 days measured; a month needs 22. The others: 27 with under 18 hours of readings or readings that failed our checks.
Apr 20249 of 30 days measured; a month needs 21. The others: 21 with under 18 hours of readings or readings that failed our checks.
Mar 20243 of 31 days measured; a month needs 22. The others: 28 with under 18 hours of readings or readings that failed our checks.
Feb 20246 of 29 days measured; a month needs 21. The others: 1 missing from OpenAQ's archive, 22 with under 18 hours of readings or readings that failed our checks.
Jan 20248 of 31 days measured; a month needs 22. The others: 23 with under 18 hours of readings or readings that failed our checks.
Dec 202318 of 31 days measured; a month needs 22. The others: 13 with under 18 hours of readings or readings that failed our checks.
Oct 20231 of 31 days measured; a month needs 22. The others: 30 with under 18 hours of readings or readings that failed our checks.
Aug 202310 of 31 days measured; a month needs 22. The others: 21 with under 18 hours of readings or readings that failed our checks.
Jul 202315 of 31 days measured; a month needs 22. The others: 1 missing from OpenAQ's archive, 15 with under 18 hours of readings or readings that failed our checks.
Jun 20232 of 30 days measured; a month needs 21. The others: 28 with under 18 hours of readings or readings that failed our checks.
May 20235 of 31 days measured; a month needs 22. The others: 26 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 20232 of 28 days measured; a month needs 20. The others: 25 missing from OpenAQ's archive, 1 with under 18 hours of readings or readings that failed our checks.
Jan 202313 of 31 days measured; a month needs 22. The others: 1 missing from OpenAQ's archive, 2 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.

García's worst months

MonthUS AQIDays measuredWorld rank
November 2025 8426.8 µg/m³21 of 30276thof 2,715
April 2025 7622.3 µg/m³21 of 30274thof 2,951
July 2025 7320.9 µg/m³24 of 31185thof 2,889
April 2023 7220.3 µg/m³24 of 30108thof 1,622
October 2025 7019.1 µg/m³25 of 31297thof 2,614
September 2025 6315.6 µg/m³27 of 30323rdof 3,104

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.

García's worst days

DayUS AQIEpisode
28 Jan 2023 16271.7 µg/m³Northern Mexico and United States, January 2023
17 May 2025 13348.6 µg/m³Southern United States and Mexico, May 2025
29 Jan 2023 12244.0 µg/m³Northern Mexico and United States, January 2023
6 Mar 2025 11842.3 µg/m³–
31 Mar 2023 11742.1 µg/m³–
17 Jun 2023 10838.2 µg/m³Southern United States and Mexico, June 2023
4 Apr 2023 10637.5 µg/m³–
20 Nov 2025 10637.5 µg/m³–
19 Nov 2025 10537.3 µg/m³–
6 May 2023 10235.9 µg/m³Northern Mexico and United States, May 2023

Daily means, the highest since 16 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, García, Mexico, 16 Jan 2023 – 10 Oct 2026. Monitor data from Sinaica Mexico via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/mx/garcia/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.

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

Updated 2026-10-12 17:07 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).