Louisville Air Quality in June
Across 2019–2025, Louisville's June air quality had a median AQI of 58 (Moderate) over 210 monitored days in the Louisville/Jefferson County, KY-IN area. 12.0% of June days (25 of 210) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 53.3% of days. The cleanest June on record here was 2019 (median AQI 50, 1 day above 100) and the worst was 2023 (median 96, 12 days above 100, peak AQI 182).
- Good: 29.0%
- Moderate: 59.0%
- Unhealthy for Sensitive Groups: 11.0%
- Unhealthy or worse: 1.0%
Extra Protection for Louisville Homes
Air quality in Louisville is moderate (AQI 61), 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 Louisville in June?
Moderate on a typical day: median AQI 58 across 2019–2025, with 12.0% of June days above AQI 100. Ground-level ozone is the main driver.
- ✓29.0% of June days were Good (AQI 0–50), 59.0% Moderate (51–100).
- ✓25 days of 210 reached AQI 101+; the June peak was 182.
- ✓Best June: 2019; worst June: 2023.
Frequently asked questions
What is the air quality like in Louisville in June?▾
Across 2019–2025, the median daily AQI in Louisville in June was 58 (Moderate). 29.0% of days were Good, 59.0% Moderate, and 12.0% reached Unhealthy for Sensitive Groups or worse, based on 210 monitored days in EPA's Air Quality System.
Is June a good time for outdoor exercise in Louisville?▾
A typical June day in Louisville is Moderate (median AQI 58): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and about 1 day in 8 of June days (12.0%) reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
Which pollutant causes Louisville's June air quality problems?▾
Ground-level ozone set the daily AQI on 53.3% of June days in Louisville. The highest June AQI recorded in 2019–2025 was 182 (Unhealthy), in 2023.
Louisville June air quality, year by year
Louisville June air quality by year (Louisville/Jefferson County, KY-IN, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019cleanest | 30 | 50 | 1 | 101 | PM2.5 |
| 2020 | 30 | 60 | 1 | 101 | O3 |
| 2021 | 30 | 53 | 1 | 126 | PM2.5 |
| 2022 | 30 | 62 | 5 | 136 | O3 |
| 2023worst | 30 | 96 | 12 | 182 | PM2.5 |
| 2024 | 30 | 59 | 4 | 156 | O3 |
| 2025 | 30 | 57 | 1 | 133 | PM2.5 |
What June air means in Louisville
A typical June day in Louisville is Moderate (median AQI 58): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and about 1 day in 8 of June days (12.0%) reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
June's median AQI of 58 is above Louisville's whole-year median of 54, making it one of the area's dirtier periods. Nationally, the median June AQI across every EPA metro area (100,635 metro-days, 2019–2025) is 46, so Louisville runs above the national June norm; 12.0% of its June days topped AQI 100 versus 3.7% nationally (above average).
June is part of Louisville's summer season (June, July, August); the summer page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Louisville
The latest EPA AirNow observation puts Louisville's AQI at 61 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current Louisville air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Louisville/Jefferson County, KY-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.