SmogRank / United States / New Mexico / Las Cruces
Las Cruces, month by month
Las Cruces has a measured daily mean on 1,246 days since 1 January 2023. Its worst month was March 2025, at 63 US AQI (15.8 µg/m³), 875th of 2,862 cities on that month's world ranking. Its cleanest was November 2023, at 16 US AQI (2.9 µg/m³). 2025 averaged 38 US AQI (6.8 µg/m³), against 28 US AQI (5.1 µg/m³) in 2024.
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
2 months
| Month | Why |
|---|---|
| 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.
Las Cruces's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| March 2025 | 6315.8 µg/m³ | 875thof 2,862 | South-western United States and Mexico, March 2025 |
| April 2025 | 5410.8 µg/m³ | 985thof 2,951 | South-western United States and Mexico, April 2025 |
| May 2025 | 5410.8 µg/m³ | 734thof 2,826 | South-western United States and Mexico, May 2025 |
| June 2025 | 519.3 µg/m³ | 1,512thof 2,508 | – |
| July 2025 | 468.2 µg/m³ | 1,729thof 2,889 | – |
| July 2024 | 458.1 µg/m³ | 1,307thof 2,566 | – |
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.
Las Cruces's worst days
| Day | US AQI | Episode |
|---|---|---|
| 18 Mar 2025 | 191112.0 µg/m³ | South-western United States and Mexico, March 2025 |
| 31 May 2025 | 16879.2 µg/m³ | – |
| 27 Apr 2025 | 15257.0 µg/m³ | – |
| 13 Mar 2025 | 14452.8 µg/m³ | – |
| 3 Mar 2025 | 14352.7 µg/m³ | – |
| 14 Mar 2025 | 13449.0 µg/m³ | – |
| 17 Apr 2025 | 13348.5 µg/m³ | – |
| 6 Mar 2025 | 11039.2 µg/m³ | – |
| 1 Apr 2025 | 10838.4 µg/m³ | South-western United States and Mexico, April 2025 |
| 12 Jul 2025 | 10035.2 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, Las Cruces, United States, 1 Jan 2023 – 11 Oct 2026. Monitor data from AirNow, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/us/las-cruces/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.
Las Cruces now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 20:07 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).