SmogRank / Mexico / Nuevo León / Cadereyta Jiménez

Cadereyta Jiménez, month by month

Cadereyta Jiménez has a measured daily mean on 701 days since 10 January 2023. Its worst month was April 2025, at 76 US AQI (22.4 µg/m³), 272nd of 2,951 cities on that month's world ranking. Its cleanest was September 2026, at 54 US AQI (10.6 µg/m³).

Every month since 2023

202661 so far255 days measured601st of 2,793 in the world
Jan15 daysFeb71#559Mar59#992Apr63#537May57#565Jun54#576Jul62#524Aug60#434Sep54#598Oct44#1,006
2025too few days for a mean (a year needs 256)197 days measured
Jan9 daysFeb3 daysMar16 daysApr76#272May74#237Jun4 daysJul11 daysAug5 daysSep15 daysOct61#367Nov69#448Dec73#480
2024too few days for a mean (a year needs 257)57 days measured
Jan15 daysFeb5 daysMar4 daysApr9 daysMay6 daysJun1 dayJul3 daysAugnoneSep3 daysOct3 daysNov4 daysDec4 days
2023too few days for a mean (a year needs 256)192 days measured
Jan15 daysFeb2 daysMar10 daysApr62#161May3 daysJun2 daysJul15 daysAug58#268Sep54#472Oct12 daysNov60#184Dec75#123
Each square is a month's mean PM2.5 in US AQI from Cadereyta Jiménez'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 Cadereyta Jiménez 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

27 months
MonthWhy
Jan 202615 of 31 days measured; a month needs 22. The others: 16 with under 18 hours of readings or readings that failed our checks.
Sep 202515 of 30 days measured; a month needs 21. The others: 15 with under 18 hours of readings or readings that failed our checks.
Aug 20255 of 31 days measured; a month needs 22. The others: 26 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 20254 of 30 days measured; a month needs 21. The others: 26 with under 18 hours of readings or readings that failed our checks.
Mar 202516 of 31 days measured; a month needs 22. The others: 15 with under 18 hours of readings or readings that failed our checks.
Feb 20253 of 28 days measured; a month needs 20. The others: 25 with under 18 hours of readings or readings that failed our checks.
Jan 20259 of 31 days measured; a month needs 22. The others: 22 with under 18 hours of readings or readings that failed our checks.
Dec 20244 of 31 days measured; a month needs 22. The others: 27 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.
Oct 20243 of 31 days measured; a month needs 22. The others: 28 with under 18 hours of readings or readings that failed our checks.
Sep 20243 of 30 days measured; a month needs 21. The others: 27 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 20243 of 31 days measured; a month needs 22. The others: 28 with under 18 hours of readings or readings that failed our checks.
Jun 20241 of 30 days measured; a month needs 21. The others: 29 with under 18 hours of readings or readings that failed our checks.
May 20246 of 31 days measured; a month needs 22. The others: 25 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 20244 of 31 days measured; a month needs 22. The others: 27 with under 18 hours of readings or readings that failed our checks.
Feb 20245 of 29 days measured; a month needs 21. The others: 24 with under 18 hours of readings or readings that failed our checks.
Jan 202415 of 31 days measured; a month needs 22. The others: 16 with under 18 hours of readings or readings that failed our checks.
Oct 202312 of 31 days measured; a month needs 22. The others: 19 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 20233 of 31 days measured; a month needs 22. The others: 28 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 202315 of 31 days measured; a month needs 22. The others: 6 missing from OpenAQ's archive, 1 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.

Cadereyta Jiménez's worst months

MonthUS AQIDays measuredWorld rankEpisode
April 2025 7622.4 µg/m³22 of 30272ndof 2,951Southern United States and Mexico, March and April 2025
December 2023 7522.1 µg/m³30 of 31123rdof 2,247–
May 2025 7421.4 µg/m³28 of 31237thof 2,826Southern United States and Mexico, May 2025
December 2025 7320.7 µg/m³27 of 31480thof 3,006–
February 2026 7120.0 µg/m³26 of 28559thof 2,866Southern United States and Mexico, February 2026
November 2025 6918.6 µg/m³28 of 30448thof 2,715–

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.

Cadereyta Jiménez's worst days

DayUS AQIEpisode
1 Jan 2024 199124.0 µg/m³–
19 Mar 2025 16981.8 µg/m³–
20 Feb 2026 12846.5 µg/m³Southern United States and Mexico, February 2026
31 Dec 2023 12645.7 µg/m³–
1 Apr 2024 12445.0 µg/m³Southern United States and Mexico, April 2024
1 Jan 2026 12444.7 µg/m³–
10 May 2024 11842.3 µg/m³Southern United States and Mexico, 7 to 10 May 2024
29 Jan 2023 11139.7 µg/m³Northern Mexico and United States, January 2023
2 Dec 2023 11139.5 µg/m³–
8 Jan 2026 11139.5 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, Cadereyta Jiménez, Mexico, 10 Jan 2023 – 11 Oct 2026. Monitor data from Sinaica Mexico via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/mx/cadereyta-jimenez/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.

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

Updated 2026-10-12 22:07 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).