Miami Air Quality in March
Across 2019–2025, Miami's March air quality had a median AQI of 54 (Moderate) over 217 monitored days in the Miami-Fort Lauderdale-West Palm Beach, FL area. 1.4% of March days (3 of 217) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 74.7% of days. The cleanest March on record here was 2020 (median AQI 48, 0 days above 100) and the worst was 2025 (median 58, 1 day above 100, peak AQI 113).
- Good: 32.7%
- Moderate: 65.9%
- Unhealthy for Sensitive Groups: 1.4%
- 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 March?
Moderate on a typical day: median AQI 54 across 2019–2025, with 1.4% of March days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓32.7% of March days were Good (AQI 0–50), 65.9% Moderate (51–100).
- ✓3 days of 217 reached AQI 101+; the March peak was 113.
- ✓Best March: 2020; worst March: 2025.
Frequently asked questions
What is the air quality like in Miami in March?▾
Across 2019–2025, the median daily AQI in Miami in March was 54 (Moderate). 32.7% of days were Good, 65.9% Moderate, and 1.4% reached Unhealthy for Sensitive Groups or worse, based on 217 monitored days in EPA's Air Quality System.
Is March a good time for outdoor exercise in Miami?▾
A typical March day in Miami is Moderate (median AQI 54): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and about 1 day in 71 of March days (1.4%) reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
Which pollutant causes Miami's March air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 74.7% of March days in Miami. The highest March AQI recorded in 2019–2025 was 113 (Unhealthy for Sensitive Groups), in 2025.
Miami March air quality, year by year
Miami March 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 | 52 | 1 | 105 | PM2.5 |
| 2020cleanest | 31 | 48 | 0 | 61 | PM2.5 |
| 2021 | 31 | 52 | 0 | 71 | PM2.5 |
| 2022 | 31 | 54 | 1 | 112 | PM2.5 |
| 2023 | 31 | 59 | 0 | 90 | PM2.5 |
| 2024 | 31 | 52 | 0 | 64 | PM2.5 |
| 2025worst | 31 | 58 | 1 | 113 | PM2.5 |
What March air means in Miami
A typical March day in Miami is Moderate (median AQI 54): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and about 1 day in 71 of March days (1.4%) reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
March's median AQI of 54 is in line with Miami's whole-year median of 51, so this period is neither a clean nor a dirty stretch for the area. Nationally, the median March AQI across every EPA metro area (102,455 metro-days, 2019–2025) is 42, so Miami runs above the national March norm; 1.4% of its March days topped AQI 100 versus 0.4% nationally (about the same).
March is part of Miami's spring season (March, April, May); the spring 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.