Fort Wayne Air Quality in September
Across 2019–2025, Fort Wayne's September air quality had a median AQI of 49 (Good) over 210 monitored days in the Fort Wayne, IN area. 1.4% of September days (3 of 210) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 58.1% of days. The cleanest September on record here was 2024 (median AQI 41, 0 days above 100) and the worst was 2025 (median 54, 2 days above 100, peak AQI 108).
- Good: 54.8%
- Moderate: 43.8%
- Unhealthy for Sensitive Groups: 1.4%
- Unhealthy or worse: 0.0%
Improve Indoor Air Quality
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How is the air in Fort Wayne in September?
Good on a typical day: median AQI 49 across 2019–2025, with 1.4% of September days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓54.8% of September days were Good (AQI 0–50), 43.8% Moderate (51–100).
- ✓3 days of 210 reached AQI 101+; the September peak was 108.
- ✓Best September: 2024; worst September: 2025.
Frequently asked questions
What is the air quality like in Fort Wayne in September?▾
Across 2019–2025, the median daily AQI in Fort Wayne in September was 49 (Good). 54.8% of days were Good, 43.8% Moderate, and 1.4% reached Unhealthy for Sensitive Groups or worse, based on 210 monitored days in EPA's Air Quality System.
Is September a good time for outdoor exercise in Fort Wayne?▾
A typical September day in Fort Wayne sits in the Good range (median AQI 49), so running, cycling and children's outdoor play are fine for everyone on most days; about 1 day in 71 of September days (1.4%) reached AQI 101+ in 2019–2025.
Which pollutant causes Fort Wayne's September air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 58.1% of September days in Fort Wayne. The highest September AQI recorded in 2019–2025 was 108 (Unhealthy for Sensitive Groups), in 2025.
Fort Wayne September air quality, year by year
Fort Wayne September air quality by year (Fort Wayne, IN, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 30 | 51 | 1 | 101 | PM2.5 |
| 2020 | 30 | 53 | 0 | 62 | PM2.5 |
| 2021 | 30 | 42 | 0 | 62 | PM2.5 |
| 2022 | 30 | 45 | 0 | 64 | PM2.5 |
| 2023 | 30 | 46 | 0 | 61 | O3 |
| 2024cleanest | 30 | 41 | 0 | 97 | O3 |
| 2025worst | 30 | 54 | 2 | 108 | O3 |
What September air means in Fort Wayne
A typical September day in Fort Wayne sits in the Good range (median AQI 49), so running, cycling and children's outdoor play are fine for everyone on most days; about 1 day in 71 of September days (1.4%) reached AQI 101+ in 2019–2025.
September's median AQI of 49 is in line with Fort Wayne's whole-year median of 49, so this period is neither a clean nor a dirty stretch for the area. Nationally, the median September AQI across every EPA metro area (100,699 metro-days, 2019–2025) is 43, so Fort Wayne runs above the national September norm; 1.4% of its September days topped AQI 100 versus 2.7% nationally (below average).
September is part of Fort Wayne's fall season (September, October, November); the fall page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Fort Wayne
The latest EPA AirNow observation puts Fort Wayne's AQI at 27 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current Fort Wayne air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Fort Wayne, IN), 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.