Dayton Air Quality in June
Across 2019–2025, Dayton's June air quality had a median AQI of 58 (Moderate) over 210 monitored days in the Dayton, OH area. 8.5% of June days (18 of 210) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 51.4% of days. The cleanest June on record here was 2019 (median AQI 50, 0 days above 100) and the worst was 2023 (median 80, 10 days above 100, peak AQI 204).
- Good: 31.4%
- Moderate: 60.0%
- Unhealthy for Sensitive Groups: 7.1%
- Unhealthy or worse: 1.4%
Improve Indoor Air Quality
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How is the air in Dayton in June?
Moderate on a typical day: median AQI 58 across 2019–2025, with 8.5% of June days above AQI 100. Ground-level ozone is the main driver.
- ✓31.4% of June days were Good (AQI 0–50), 60.0% Moderate (51–100).
- ✓18 days of 210 reached AQI 101+; the June peak was 204.
- ✓Best June: 2019; worst June: 2023.
Frequently asked questions
What is the air quality like in Dayton in June?▾
Across 2019–2025, the median daily AQI in Dayton in June was 58 (Moderate). 31.4% of days were Good, 60.0% Moderate, and 8.5% 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 Dayton?▾
A typical June day in Dayton 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 12 of June days (8.5%) reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
Which pollutant causes Dayton's June air quality problems?▾
Ground-level ozone set the daily AQI on 51.4% of June days in Dayton. The highest June AQI recorded in 2019–2025 was 204 (Very Unhealthy), in 2023.
Dayton June air quality, year by year
Dayton June air quality by year (Dayton, OH, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019cleanest | 30 | 50 | 0 | 90 | O3 |
| 2020 | 30 | 58 | 1 | 101 | O3 |
| 2021 | 30 | 55 | 0 | 100 | PM2.5 |
| 2022 | 30 | 63 | 3 | 136 | O3 |
| 2023worst | 30 | 80 | 10 | 204 | PM2.5 |
| 2024 | 30 | 53 | 3 | 147 | O3 |
| 2025 | 30 | 58 | 1 | 129 | PM2.5 |
What June air means in Dayton
A typical June day in Dayton 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 12 of June days (8.5%) 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 Dayton's whole-year median of 51, 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 Dayton runs above the national June norm; 8.5% of its June days topped AQI 100 versus 3.7% nationally (above average).
June is part of Dayton's summer season (June, July, August); the summer page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Dayton
The latest EPA AirNow observation puts Dayton's AQI at 50 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current Dayton air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Dayton, OH), 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.