Miami Air Quality in 2023
In 2023, Miami's air quality (Miami-Fort Lauderdale-West Palm Beach, FL area) had a median daily AQI of 53 (Moderate) across 365 monitored days. 4 days (1.1%) reached Unhealthy for Sensitive Groups or worse, 136 were Good, and the year's peak AQI was 170 (Unhealthy). Fine particulate matter (PM2.5) set the daily AQI on 302 of those days. The cleanest month of 2023 was September (median AQI 45, 0 days above 100) and the worst was January (median 58, 1 day above 100, peak 170).
- Good: 37.3%
- Moderate: 61.6%
- Unhealthy for Sensitive Groups: 0.3%
- Unhealthy or worse: 0.8%
Reduce Indoor Ozone in Miami
Today's main pollutant in Miami is ground-level ozone (AQI 19). Important: standard HEPA filters do NOT remove ozone — only a purifier with a substantial activated-carbon bed adsorbs it. The biggest wins are cutting indoor sources (gas appliances, certain "ionizer" purifiers) and ventilating when outdoor ozone is low (early morning). A high-carbon unit helps with the gases and VOCs that linger indoors.
Recommended: Levoit Core 300 — True HEPA + activated carbon · CADR ~141 CFM · rooms up to 219 sq ft
As an Amazon Associate, we earn from qualifying purchases.
How was Miami's air quality in 2023?
Moderate on a typical day: median AQI 53, with 4 days above AQI 100 out of 365 monitored — the 7th cleanest of 7 years on record for the area.
- ✓Peak AQI in 2023: 170 (Unhealthy).
- ✓Fine particulate matter (PM2.5) was the main pollutant on 302 days.
- ✓Cleanest month: September; worst: January.
Frequently asked questions
What was the average AQI in Miami in 2023?▾
EPA's Air Quality System puts Miami's (Miami-Fort Lauderdale-West Palm Beach, FL) median daily AQI for 2023 at 53, which is Moderate. 4 days were Unhealthy for Sensitive Groups or worse and the year's highest AQI was 170.
Which month had the worst air quality in Miami in 2023?▾
The cleanest month of 2023 was September (median AQI 45, 0 days above 100) and the worst was January (median 58, 1 day above 100, peak 170).
Was 2023 a good or bad year for Miami's air?▾
Among the 7 years EPA has published for the area (2019–2025), 2023 ranks 7th cleanest by days above AQI 100 — the worst year on record here. 2023's median of 53 is in line with the area's typical annual median of 51.
Miami month by month in 2023
Miami air quality month by month, 2023 (Miami-Fort Lauderdale-West Palm Beach, FL, EPA AQS daily AQI)
| Month | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| Januaryworst | 31 | 58 | 1 | 170 | PM2.5 |
| February | 28 | 57 | 0 | 75 | PM2.5 |
| March | 31 | 59 | 0 | 90 | PM2.5 |
| April | 30 | 54 | 0 | 67 | PM2.5 |
| May | 31 | 57 | 1 | 154 | PM2.5 |
| June | 30 | 54 | 0 | 64 | PM2.5 |
| July | 31 | 60 | 0 | 88 | PM2.5 |
| August | 31 | 59 | 0 | 75 | PM2.5 |
| Septembercleanest | 30 | 45 | 0 | 59 | PM2.5 |
| October | 31 | 46 | 1 | 122 | PM2.5 |
| November | 30 | 45 | 0 | 54 | PM2.5 |
| December | 31 | 42 | 1 | 156 | PM2.5 |
How 2023 compares
Among the 7 years EPA has published for the area (2019–2025), 2023 ranks 7th cleanest by days above AQI 100 — the worst year on record here.
2023's median of 53 is in line with the area's typical annual median of 51.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Miami
The latest EPA AirNow observation puts Miami's AQI at 19 (O3). The figures above are multi-year annual 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.