Syracuse Air Quality in September
Across 2019–2025, Syracuse's September air quality had a median AQI of 33 (Good) over 210 monitored days in the Syracuse, NY area. 0.0% of September days (0 of 210) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 68.6% of days. The cleanest September on record here was 2022 (median AQI 28, 0 days above 100) and the worst was 2025 (median 36, 0 days above 100, peak AQI 48).
- Good: 90.5%
- Moderate: 9.5%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
Extra Protection for Syracuse Homes
Air quality in Syracuse is moderate (AQI 56), 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 Syracuse in September?
Good on a typical day: median AQI 33 across 2019–2025, with 0.0% of September days above AQI 100. Ground-level ozone is the main driver.
- ✓90.5% of September days were Good (AQI 0–50), 9.5% Moderate (51–100).
- ✓0 days of 210 reached AQI 101+; the September peak was 67.
- ✓Best September: 2022; worst September: 2025.
Frequently asked questions
What is the air quality like in Syracuse in September?▾
Across 2019–2025, the median daily AQI in Syracuse in September was 33 (Good). 90.5% of days were Good, 9.5% Moderate, and 0.0% 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 Syracuse?▾
A typical September day in Syracuse sits in the Good range (median AQI 33), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of September days reached AQI 101+ in 2019–2025.
Which pollutant causes Syracuse's September air quality problems?▾
Ground-level ozone set the daily AQI on 68.6% of September days in Syracuse. The highest September AQI recorded in 2019–2025 was 67 (Moderate), in 2025.
Syracuse September air quality, year by year
Syracuse September air quality by year (Syracuse, NY, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 30 | 34 | 0 | 56 | O3 |
| 2020 | 30 | 33 | 0 | 67 | O3 |
| 2021 | 30 | 31 | 0 | 54 | O3 |
| 2022cleanest | 30 | 28 | 0 | 55 | O3 |
| 2023 | 30 | 36 | 0 | 57 | O3 |
| 2024 | 30 | 34 | 0 | 64 | O3 |
| 2025worst | 30 | 36 | 0 | 48 | O3 |
What September air means in Syracuse
A typical September day in Syracuse sits in the Good range (median AQI 33), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of September days reached AQI 101+ in 2019–2025.
September's median AQI of 33 is below Syracuse's whole-year median of 38, making it one of the area's cleaner periods. Nationally, the median September AQI across every EPA metro area (100,699 metro-days, 2019–2025) is 43, so Syracuse runs below the national September norm; 0.0% of its September days topped AQI 100 versus 2.7% nationally (below average).
September is part of Syracuse's fall season (September, October, November); the fall page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Syracuse
The latest EPA AirNow observation puts Syracuse's AQI at 56 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current Syracuse air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Syracuse, NY), 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.