Burlington Air Quality in October
Across 2019–2025, Burlington's October air quality had a median AQI of 33 (Good) over 217 monitored days in the Burlington-South Burlington, VT area. 0.0% of October days (0 of 217) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 70.0% of days. The cleanest October on record here was 2019 (median AQI 31, 0 days above 100) and the worst was 2022 (median 38, 0 days above 100, peak AQI 61).
- Good: 89.9%
- Moderate: 10.1%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
Improve Indoor Air Quality
Even with good outdoor air in Burlington, indoor PM2.5, dust and allergens build up. A True-HEPA purifier keeps a bedroom or office consistently clean.
Recommended: Levoit Core 400S — True HEPA · CADR ~141 CFM · rooms up to 219 sq ft
As an Amazon Associate, we earn from qualifying purchases.
How is the air in Burlington in October?
Good on a typical day: median AQI 33 across 2019–2025, with 0.0% of October days above AQI 100. Ground-level ozone is the main driver.
- ✓89.9% of October days were Good (AQI 0–50), 10.1% Moderate (51–100).
- ✓0 days of 217 reached AQI 101+; the October peak was 84.
- ✓Best October: 2019; worst October: 2022.
Frequently asked questions
What is the air quality like in Burlington in October?▾
Across 2019–2025, the median daily AQI in Burlington in October was 33 (Good). 89.9% of days were Good, 10.1% Moderate, and 0.0% reached Unhealthy for Sensitive Groups or worse, based on 217 monitored days in EPA's Air Quality System.
Is October a good time for outdoor exercise in Burlington?▾
A typical October day in Burlington 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 October days reached AQI 101+ in 2019–2025.
Which pollutant causes Burlington's October air quality problems?▾
Ground-level ozone set the daily AQI on 70.0% of October days in Burlington. The highest October AQI recorded in 2019–2025 was 84 (Moderate), in 2022.
Burlington October air quality, year by year
Burlington October air quality by year (Burlington-South Burlington, VT, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019cleanest | 31 | 31 | 0 | 52 | O3 |
| 2020 | 31 | 31 | 0 | 49 | O3 |
| 2021 | 31 | 33 | 0 | 49 | PM2.5 |
| 2022worst | 31 | 38 | 0 | 61 | PM2.5 |
| 2023 | 31 | 33 | 0 | 72 | O3 |
| 2024 | 31 | 32 | 0 | 84 | O3 |
| 2025 | 31 | 32 | 0 | 80 | O3 |
What October air means in Burlington
A typical October day in Burlington 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 October days reached AQI 101+ in 2019–2025.
October's median AQI of 33 is below Burlington's whole-year median of 39, making it one of the area's cleaner periods. Nationally, the median October AQI across every EPA metro area (102,872 metro-days, 2019–2025) is 38, so Burlington runs below the national October norm; 0.0% of its October days topped AQI 100 versus 1.3% nationally (below average).
October is part of Burlington's fall season (September, October, November); the fall page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Burlington
The latest EPA AirNow observation puts Burlington's AQI at 27 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current Burlington air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Burlington-South Burlington, VT), 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.