SmogRank / Mexico / Jalisco / Guadalajara

Guadalajara, month by month

Guadalajara has a measured daily mean on 698 days since 10 January 2023. Its worst month was December 2025, at 106 US AQI (37.4 µg/m³), 261st of 3,006 cities on that month's world ranking. Its cleanest was June 2026, at 58 US AQI (13.1 µg/m³).

Every month since 2023

202671 so far280 days measured357th of 2,793 in the world
Jan98#133Feb78#431Mar72#585Apr68#440May70#297Jun58#419Jul67#406Aug69#279Sep67#317Oct60#274
2025too few days for a mean (a year needs 256)172 days measured
JannoneFebnoneMar21 daysApr77#267May75#234Jun61#504JulnoneAugnoneSepnoneOct8 daysNov98#234Dec106#261
2024too few days for a mean (a year needs 257)47 days measured
Jan14 daysFeb5 daysMar3 daysApr6 daysMay2 daysJun11 daysJul2 daysAug1 daySep2 daysOctnoneNov1 dayDecnone
2023too few days for a mean (a year needs 256)199 days measured
Jan14 daysFeb2 daysMar11 daysApr90#49May6 daysJun9 daysJul15 daysAug60#232Sep72#99Oct13 daysNov90#27Dec84#82
Each square is a month's mean PM2.5 in US AQI from Guadalajara'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 Guadalajara 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

26 months
MonthWhy
Oct 20258 of 31 days measured; a month needs 22. The others: 23 with under 18 hours of readings or readings that failed our checks.
Sep 2025No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Aug 2025No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jul 2025No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Mar 202521 of 31 days measured; a month needs 22. The others: 10 with under 18 hours of readings or readings that failed our checks.
Feb 2025No day measured. The others: 28 with under 18 hours of readings or readings that failed our checks.
Jan 2025No day measured. The others: 31 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 20241 of 30 days measured; a month needs 21. The others: 29 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 20242 of 30 days measured; a month needs 21. The others: 28 with under 18 hours of readings or readings that failed our checks.
Aug 20241 of 31 days measured; a month needs 22. The others: 30 with under 18 hours of readings or readings that failed our checks.
Jul 20242 of 31 days measured; a month needs 22. The others: 29 with under 18 hours of readings or readings that failed our checks.
Jun 202411 of 30 days measured; a month needs 21. The others: 19 with under 18 hours of readings or readings that failed our checks.
May 20242 of 31 days measured; a month needs 22. The others: 29 with under 18 hours of readings or readings that failed our checks.
Apr 20246 of 30 days measured; a month needs 21. The others: 24 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 20245 of 29 days measured; a month needs 21. The others: 1 missing from OpenAQ's archive, 23 with under 18 hours of readings or readings that failed our checks.
Jan 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 202313 of 31 days measured; a month needs 22. The others: 18 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 20239 of 30 days measured; a month needs 21. The others: 21 with under 18 hours of readings or readings that failed our checks.
May 20236 of 31 days measured; a month needs 22. The others: 25 with under 18 hours of readings or readings that failed our checks.
Mar 202311 of 31 days measured; a month needs 22. The others: 20 missing from OpenAQ's archive.
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 202314 of 31 days measured; a month needs 22. The others: 6 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.

Guadalajara's worst months

MonthUS AQIDays measuredWorld rankEpisode
December 2025 10637.4 µg/m³31 of 31261stof 3,006–
November 2025 9834.1 µg/m³27 of 30234thof 2,715–
January 2026 9834.1 µg/m³31 of 31133rdof 2,617Southern Mexico, January 2026
November 2023 9030.2 µg/m³28 of 3027thof 2,243–
April 2023 9029.9 µg/m³24 of 3049thof 1,622–
December 2023 8426.7 µg/m³28 of 3182ndof 2,247Southern Mexico, December 2023

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.

Guadalajara's worst days

DayUS AQIEpisode
1 Jan 2026 250175.0 µg/m³Southern Mexico, January 2026
25 Dec 2025 184102.0 µg/m³–
25 Dec 2023 17386.8 µg/m³Southern Mexico, December 2023
21 Dec 2025 17082.7 µg/m³–
19 Dec 2025 16372.4 µg/m³–
21 Jun 2023 16169.7 µg/m³–
20 Dec 2025 16068.5 µg/m³–
17 Jan 2023 15966.5 µg/m³–
4 May 2023 15764.7 µg/m³Guanajuato and Jalisco, Mexico, May 2023
23 Feb 2024 15561.5 µg/m³–

Daily means, the highest since 10 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, Guadalajara, Mexico, 10 Jan 2023 – 11 Oct 2026. Monitor data from Sinaica Mexico via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/mx/guadalajara/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.

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

Updated 2026-10-12 23:07 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).