Fort Worth Air Quality in September
Across 2019–2025, Fort Worth's September air quality had a median AQI of 68 (Moderate) over 210 monitored days in the Dallas-Fort Worth-Arlington, TX area. 28.1% of September days (59 of 210) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 73.8% of days. The cleanest September on record here was 2020 (median AQI 54, 0 days above 100) and the worst was 2023 (median 99, 14 days above 100, peak AQI 151).
- Good: 21.9%
- Moderate: 50.0%
- Unhealthy for Sensitive Groups: 25.2%
- Unhealthy or worse: 2.9%
Extra Protection for Fort Worth Homes
Air quality in Fort Worth is moderate (AQI 55), 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 Fort Worth in September?
Moderate on a typical day: median AQI 68 across 2019–2025, with 28.1% of September days above AQI 100. Ground-level ozone is the main driver.
- ✓21.9% of September days were Good (AQI 0–50), 50.0% Moderate (51–100).
- ✓59 days of 210 reached AQI 101+; the September peak was 179.
- ✓Best September: 2020; worst September: 2023.
Frequently asked questions
What is the air quality like in Fort Worth in September?▾
Across 2019–2025, the median daily AQI in Fort Worth in September was 68 (Moderate). 21.9% of days were Good, 50.0% Moderate, and 28.1% 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 Worth?▾
A typical September day in Fort Worth is Moderate (median AQI 68): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and about 1 day in 4 of September days (28.1%) reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
Which pollutant causes Fort Worth's September air quality problems?▾
Ground-level ozone set the daily AQI on 73.8% of September days in Fort Worth. The highest September AQI recorded in 2019–2025 was 179 (Unhealthy), in 2023.
Fort Worth September air quality, year by year
Fort Worth September air quality by year (Dallas-Fort Worth-Arlington, TX, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 30 | 54 | 7 | 156 | O3 |
| 2020cleanest | 30 | 54 | 0 | 97 | PM2.5 |
| 2021 | 30 | 73 | 9 | 159 | O3 |
| 2022 | 30 | 92 | 12 | 133 | O3 |
| 2023worst | 30 | 99 | 14 | 151 | O3 |
| 2024 | 30 | 66 | 3 | 156 | O3 |
| 2025 | 30 | 97 | 14 | 179 | O3 |
What September air means in Fort Worth
A typical September day in Fort Worth is Moderate (median AQI 68): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and about 1 day in 4 of September days (28.1%) reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
September's median AQI of 68 is above Fort Worth's whole-year median of 58, making it one of the area's dirtier periods. Nationally, the median September AQI across every EPA metro area (100,699 metro-days, 2019–2025) is 43, so Fort Worth runs above the national September norm; 28.1% of its September days topped AQI 100 versus 2.7% nationally (above average).
September is part of Fort Worth's fall season (September, October, November); the fall page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Fort Worth
The latest EPA AirNow observation puts Fort Worth's AQI at 55 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current Fort Worth air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Dallas-Fort Worth-Arlington, TX), 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.