Miami Air Quality in Spring
Across 2019–2025, Miami's spring (March–May) air quality had a median AQI of 54 (Moderate) over 644 monitored days in the Miami-Fort Lauderdale-West Palm Beach, FL area. 1.0% of spring days (6 of 644) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 75.6% of days. The cleanest spring on record here was 2020 (median AQI 54, 0 days above 100) and the worst was 2023 (median 56, 1 day above 100, peak AQI 154).
- Good: 30.6%
- Moderate: 68.5%
- Unhealthy for Sensitive Groups: 0.8%
- Unhealthy or worse: 0.2%
Extra Protection for Miami Homes
Air quality in Miami is moderate (AQI 51), 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 spring?
Moderate on a typical day: median AQI 54 across 2019–2025, with 1.0% of spring days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓30.6% of spring days were Good (AQI 0–50), 68.5% Moderate (51–100).
- ✓6 days of 644 reached AQI 101+; the spring peak was 154.
- ✓Cleanest month: April; worst month: March.
Frequently asked questions
What is the air quality like in Miami in spring?▾
Across 2019–2025, the median daily AQI in Miami in spring was 54 (Moderate). 30.6% of days were Good, 68.5% Moderate, and 1.0% reached Unhealthy for Sensitive Groups or worse, based on 644 monitored days in EPA's Air Quality System.
Is spring a good time for outdoor exercise in Miami?▾
A typical spring 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 100 of spring days (1.0%) 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 spring air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 75.6% of spring days in Miami. The highest spring AQI recorded in 2019–2025 was 154 (Unhealthy), in 2023.
Miami spring air quality, year by year
Miami spring 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 | 92 | 52 | 1 | 105 | PM2.5 |
| 2020cleanest | 92 | 54 | 0 | 93 | PM2.5 |
| 2021 | 92 | 53 | 1 | 103 | PM2.5 |
| 2022 | 92 | 53 | 1 | 112 | PM2.5 |
| 2023worst | 92 | 56 | 1 | 154 | PM2.5 |
| 2024 | 92 | 55 | 1 | 108 | PM2.5 |
| 2025 | 92 | 55 | 1 | 113 | PM2.5 |
What spring air means in Miami
A typical spring 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 100 of spring days (1.0%) reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
Spring'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 Spring AQI across every EPA metro area (307,196 metro-days, 2019–2025) is 43, so Miami runs above the national Spring norm; 1.0% of its Spring days topped AQI 100 versus 0.8% nationally (about the same).
Within the season, April is the cleanest month (median AQI 55, 0.5% of days above 100) and March the worst (median 54, 1.4% above 100).
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Miami
The latest EPA AirNow observation puts Miami's AQI at 51 (PM2.5). The figures above are multi-year season 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.