Lexington Air Quality in October
Across 2019–2025, Lexington's October air quality had a median AQI of 39 (Good) over 217 monitored days in the Lexington-Fayette, KY 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 59.0% of days. The cleanest October on record here was 2023 (median AQI 35, 0 days above 100) and the worst was 2021 (median 46, 0 days above 100, peak AQI 61).
- Good: 80.2%
- Moderate: 19.8%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
Extra Protection for Lexington Homes
Air quality in Lexington is moderate (AQI 53), 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 Lexington in October?
Good on a typical day: median AQI 39 across 2019–2025, with 0.0% of October days above AQI 100. Ground-level ozone is the main driver.
- ✓80.2% of October days were Good (AQI 0–50), 19.8% Moderate (51–100).
- ✓0 days of 217 reached AQI 101+; the October peak was 74.
- ✓Best October: 2023; worst October: 2021.
Frequently asked questions
What is the air quality like in Lexington in October?▾
Across 2019–2025, the median daily AQI in Lexington in October was 39 (Good). 80.2% of days were Good, 19.8% 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 Lexington?▾
A typical October day in Lexington sits in the Good range (median AQI 39), 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 Lexington's October air quality problems?▾
Ground-level ozone set the daily AQI on 59.0% of October days in Lexington. The highest October AQI recorded in 2019–2025 was 74 (Moderate), in 2021.
Lexington October air quality, year by year
Lexington October air quality by year (Lexington-Fayette, KY, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 31 | 36 | 0 | 67 | O3 |
| 2020 | 31 | 41 | 0 | 57 | PM2.5 |
| 2021worst | 31 | 46 | 0 | 61 | PM2.5 |
| 2022 | 31 | 44 | 0 | 61 | PM2.5 |
| 2023cleanest | 31 | 35 | 0 | 54 | O3 |
| 2024 | 31 | 42 | 0 | 74 | O3 |
| 2025 | 31 | 36 | 0 | 58 | O3 |
What October air means in Lexington
A typical October day in Lexington sits in the Good range (median AQI 39), 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 39 is below Lexington's whole-year median of 44, 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 Lexington runs in line with the national October norm; 0.0% of its October days topped AQI 100 versus 1.3% nationally (below average).
October is part of Lexington's fall season (September, October, November); the fall page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Lexington
The latest EPA AirNow observation puts Lexington's AQI at 53 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current Lexington air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Lexington-Fayette, KY), 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.