Miami Air Quality in October
Across 2019–2025, Miami's October air quality had a median AQI of 44 (Good) over 217 monitored days in the Miami-Fort Lauderdale-West Palm Beach, FL area. 0.5% of October days (1 of 217) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 66.8% of days. The cleanest October on record here was 2025 (median AQI 39, 0 days above 100) and the worst was 2023 (median 46, 1 day above 100, peak AQI 122).
- Good: 72.4%
- Moderate: 27.2%
- Unhealthy for Sensitive Groups: 0.5%
- Unhealthy or worse: 0.0%
Extra Protection for Miami Homes
Air quality in Miami is moderate (AQI 54), with fine particles (PM2.5) the main concern. A True-HEPA purifier gives sensitive groups — kids, seniors and anyone with asthma or allergies — cleaner air indoors on days like today.
Recommended: Coway AP-1512HH Mighty — True HEPA + carbon · CADR ~246 CFM · rooms up to 361 sq ft
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How is the air in Miami in October?
Good on a typical day: median AQI 44 across 2019–2025, with 0.5% of October days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓72.4% of October days were Good (AQI 0–50), 27.2% Moderate (51–100).
- ✓1 day of 217 reached AQI 101+; the October peak was 122.
- ✓Best October: 2025; worst October: 2023.
Frequently asked questions
What is the air quality like in Miami in October?▾
Across 2019–2025, the median daily AQI in Miami in October was 44 (Good). 72.4% of days were Good, 27.2% Moderate, and 0.5% reached Unhealthy for Sensitive Groups or worse, based on 217 monitored days in EPA's Air Quality System.
Is October a good time for outdoor exercise in Miami?▾
A typical October day in Miami sits in the Good range (median AQI 44), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of October days reached AQI 101+ in 2019–2025.
Which pollutant causes Miami's October air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 66.8% of October days in Miami. The highest October AQI recorded in 2019–2025 was 122 (Unhealthy for Sensitive Groups), in 2023.
Miami October air quality, year by year
Miami October air quality by year (Miami-Fort Lauderdale-West Palm Beach, FL, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 31 | 44 | 0 | 59 | PM2.5 |
| 2020 | 31 | 46 | 0 | 57 | PM2.5 |
| 2021 | 31 | 43 | 0 | 73 | PM2.5 |
| 2022 | 31 | 51 | 0 | 97 | PM2.5 |
| 2023worst | 31 | 46 | 1 | 122 | PM2.5 |
| 2024 | 31 | 44 | 0 | 71 | PM2.5 |
| 2025cleanest | 31 | 39 | 0 | 51 | O3 |
What October air means in Miami
A typical October day in Miami sits in the Good range (median AQI 44), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of October days reached AQI 101+ in 2019–2025.
October's median AQI of 44 is below Miami's whole-year median of 51, making it one of the area's cleaner periods. Nationally, the median October AQI across every EPA metro area (102,872 metro-days, 2019–2025) is 38, so Miami runs above the national October norm; 0.5% of its October days topped AQI 100 versus 1.3% nationally (about the same).
October is part of Miami's fall season (September, October, November); the fall page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Miami
The latest EPA AirNow observation puts Miami's AQI at 54 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current Miami air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Miami-Fort Lauderdale-West Palm Beach, FL), 2019–2025. Daily AQI per CBSA is the highest AQI reported by any monitor in the area that day; the defining parameter is the pollutant that set it. Month and season statistics pool every such day in the period across all years listed. Retrieved 2026-09-09.