SmogRank / United States / Florida / Miami
Miami, month by month
Miami has a measured daily mean on 1,335 days since 1 January 2023. Its worst month was July 2023, at 56 US AQI (11.6 µg/m³), 448th of 1,432 cities on that month's world ranking. Its cleanest was September 2025, at 29 US AQI (5.3 µg/m³). 2025 averaged 44 US AQI (8.0 µg/m³), against 47 US AQI (8.5 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
Miami's worst months
| Month | US AQI | World rank |
|---|---|---|
| July 2023 | 5611.6 µg/m³ | 448thof 1,432 |
| July 2024 | 5511.1 µg/m³ | 550thof 2,566 |
| May 2024 | 5410.9 µg/m³ | 609thof 2,684 |
| July 2026 | 5410.8 µg/m³ | 1,165thof 2,784 |
| July 2025 | 5310.3 µg/m³ | 1,201stof 2,889 |
| March 2025 | 5310.1 µg/m³ | 1,578thof 2,862 |
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.
Miami's worst days
| Day | US AQI | Episode |
|---|---|---|
| 1 Jan 2024 | 15358.6 µg/m³ | Florida and Georgia, United States, December 2023 to January 2024 |
| 16 Aug 2026 | 8426.6 µg/m³ | – |
| 17 Aug 2026 | 7924.1 µg/m³ | – |
| 3 Oct 2023 | 7723.0 µg/m³ | – |
| 20 Jul 2023 | 7521.9 µg/m³ | – |
| 11 Jul 2024 | 7421.4 µg/m³ | – |
| 16 May 2024 | 7421.2 µg/m³ | – |
| 24 Jul 2023 | 7321.1 µg/m³ | – |
| 9 Mar 2025 | 7320.7 µg/m³ | – |
| 25 Jul 2023 | 7220.6 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, Miami, 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/miami/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.
Miami 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).