SmogRank / Mexico / Chihuahua / Ciudad Juárez
Ciudad Juárez, month by month
Ciudad Juárez has a measured daily mean on 1,029 days since 1 January 2023. Its worst month was April 2024, at 98 US AQI (34.5 µg/m³), 61st of 2,520 cities on that month's world ranking. Its cleanest was September 2026, at 39 US AQI (7.0 µg/m³). 2025 averaged 67 US AQI (17.5 µg/m³), against 69 US AQI (18.5 µg/m³) in 2023.
Every month since 2023
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
12 months
| Month | Why |
|---|---|
| Feb 2025 | 2 of 28 days measured; a month needs 20. The others: 26 with under 18 hours of readings or readings that failed our checks. |
| Jan 2025 | 2 of 31 days measured; a month needs 22. The others: 29 with under 18 hours of readings or readings that failed our checks. |
| Dec 2024 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Nov 2024 | 2 of 30 days measured; a month needs 21. The others: 28 with under 18 hours of readings or readings that failed our checks. |
| Oct 2024 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Sep 2024 | 4 of 30 days measured; a month needs 21. The others: 26 with under 18 hours of readings or readings that failed our checks. |
| Aug 2024 | 2 of 31 days measured; a month needs 22. The others: 29 with under 18 hours of readings or readings that failed our checks. |
| Jul 2024 | 1 of 31 days measured; a month needs 22. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| Jun 2024 | 5 of 30 days measured; a month needs 21. The others: 25 with under 18 hours of readings or readings that failed our checks. |
| May 2024 | 5 of 31 days measured; a month needs 22. The others: 26 with under 18 hours of readings or readings that failed our checks. |
| Mar 2023 | 11 of 31 days measured; a month needs 22. The others: 20 missing from OpenAQ's archive. |
| Feb 2023 | 2 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. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Ciudad Juárez's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| April 2024 | 9834.5 µg/m³ | 61stof 2,520 | – |
| March 2025 | 9130.6 µg/m³ | 273rdof 2,862 | South-western United States and Mexico, March 2025 |
| April 2025 | 9030.0 µg/m³ | 166thof 2,951 | South-western United States and Mexico, April 2025 |
| May 2025 | 7622.5 µg/m³ | 221stof 2,826 | South-western United States and Mexico, May 2025 |
| December 2023 | 7622.4 µg/m³ | 118thof 2,247 | – |
| April 2023 | 7522.0 µg/m³ | 95thof 1,622 | – |
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.
Ciudad Juárez's worst days
| Day | US AQI | Episode |
|---|---|---|
| 18 Mar 2025 | 262187.5 µg/m³ | South-western United States and Mexico, March 2025 |
| 27 Apr 2025 | 251176.0 µg/m³ | – |
| 1 Apr 2025 | 210135.0 µg/m³ | South-western United States and Mexico, April 2025 |
| 24 Mar 2024 | 184103.0 µg/m³ | – |
| 15 Apr 2024 | 17691.8 µg/m³ | – |
| 6 Apr 2024 | 17083.1 µg/m³ | – |
| 13 May 2025 | 17082.0 µg/m³ | South-western United States and Mexico, May 2025 |
| 29 Apr 2024 | 16981.5 µg/m³ | – |
| 18 Apr 2024 | 16677.5 µg/m³ | – |
| 25 Apr 2024 | 16676.8 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, Ciudad Juárez, Mexico, 1 Jan 2023 – 11 Oct 2026. Monitor data from AirNow and Sinaica Mexico, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/mx/ciudad-juarez/history (accessed 12 Oct 2026).
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.
Ciudad Juárez now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 18:07 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).