SmogRank / Mexico / Aguascalientes / Aguascalientes

Aguascalientes, month by month

Aguascalientes has a measured daily mean on 783 days since 17 January 2023. Its worst month was December 2025, at 134 US AQI (48.7 µg/m³), 208th of 3,006 cities on that month's world ranking. Its cleanest was August 2024, at 46 US AQI (8.2 µg/m³).

Every month since 2023

202686 so far280 days measured219th of 2,791 in the world
Jan125#58Feb102#183Mar100#185Apr87#255May88#186Jun79#209Jul71#331Aug69#269Sep66#318Oct58#336
202572 for the year300 days measured237th of 2,681 in the world
Jan5 daysFeb1 dayMar21 daysApr79#244May79#207Jun61#504Jul58#662Aug55#936Sep52#753Oct59#380Nov93#246Dec134#208
2024too few days for a mean (a year needs 257)137 days measured
JannoneFeb13 daysMar18 daysApr12 daysMay11 daysJun16 daysJul49#1,046Aug46#1,163Sep16 daysOctnoneNovnoneDec1 day
2023too few days for a mean (a year needs 256)66 days measured
Jan12 daysFebnoneMar11 daysApr73#106May7 daysJun8 daysJul2 daysAugnoneSepnoneOctnoneNovnoneDec1 day
Each square is a month's mean PM2.5 in US AQI from Aguascalientes'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 Aguascalientes 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

24 months
MonthWhy
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 20251 of 28 days measured; a month needs 20. The others: 27 with under 18 hours of readings or readings that failed our checks.
Jan 20255 of 31 days measured; a month needs 22. The others: 26 with under 18 hours of readings or readings that failed our checks.
Dec 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 2024No day measured. The others: 30 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 202416 of 30 days measured; a month needs 21. The others: 14 with under 18 hours of readings or readings that failed our checks.
Jun 202416 of 30 days measured; a month needs 21. The others: 14 with under 18 hours of readings or readings that failed our checks.
May 202411 of 31 days measured; a month needs 22. The others: 20 with under 18 hours of readings or readings that failed our checks.
Apr 202412 of 30 days measured; a month needs 21. The others: 18 with under 18 hours of readings or readings that failed our checks.
Mar 202418 of 31 days measured; a month needs 22. The others: 13 with under 18 hours of readings or readings that failed our checks.
Feb 202413 of 29 days measured; a month needs 21. The others: 1 missing from OpenAQ's archive, 15 with under 18 hours of readings or readings that failed our checks.
Jan 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Dec 20231 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 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 20232 of 31 days measured; a month needs 22. The others: 1 missing from OpenAQ's archive, 28 with under 18 hours of readings or readings that failed our checks.
Jun 20238 of 30 days measured; a month needs 21. The others: 22 with under 18 hours of readings or readings that failed our checks.
May 20237 of 31 days measured; a month needs 22. The others: 24 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 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 202312 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.

Aguascalientes's worst months

MonthUS AQIDays measuredWorld rankEpisode
December 2025 13448.7 µg/m³31 of 31208thof 3,006–
January 2026 12545.4 µg/m³31 of 3158thof 2,617Mexico, January 2026
Southern Mexico, January 2026
February 2026 10235.9 µg/m³28 of 28183rdof 2,866–
March 2026 10035.4 µg/m³31 of 31185thof 2,971–
November 2025 9331.8 µg/m³28 of 30246thof 2,715–
May 2026 8829.0 µg/m³31 of 31186thof 2,874–

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.

Aguascalientes's worst days

DayUS AQIEpisode
31 Dec 2025 283208.0 µg/m³–
1 Jan 2026 205130.0 µg/m³Southern Mexico, January 2026
6 Jan 2026 204128.4 µg/m³Mexico, January 2026
29 Nov 2025 193116.0 µg/m³–
4 Jan 2026 193114.9 µg/m³–
30 Dec 2025 187107.0 µg/m³–
5 Jan 2026 185103.5 µg/m³Mexico, January 2026
4 Dec 2025 184103.0 µg/m³–
27 Jan 2023 17995.1 µg/m³–
20 Apr 2023 17894.7 µg/m³–

Daily means, the highest since 17 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, Aguascalientes, Mexico, 17 Jan 2023 – 11 Oct 2026. Monitor data from Sinaica Mexico via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/mx/aguascalientes/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.

Aguascalientes 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).