Dayton Air Quality in April
Across 2019–2025, Dayton's April air quality had a median AQI of 47 (Good) over 210 monitored days in the Dayton, OH area. 0.0% of April days (0 of 210) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 57.1% of days. The cleanest April on record here was 2022 (median AQI 42, 0 days above 100) and the worst was 2023 (median 52, 0 days above 100, peak AQI 90).
- Good: 58.6%
- Moderate: 41.4%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
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How is the air in Dayton in April?
Good on a typical day: median AQI 47 across 2019–2025, with 0.0% of April days above AQI 100. Ground-level ozone is the main driver.
- ✓58.6% of April days were Good (AQI 0–50), 41.4% Moderate (51–100).
- ✓0 days of 210 reached AQI 101+; the April peak was 90.
- ✓Best April: 2022; worst April: 2023.
Frequently asked questions
What is the air quality like in Dayton in April?▾
Across 2019–2025, the median daily AQI in Dayton in April was 47 (Good). 58.6% of days were Good, 41.4% Moderate, and 0.0% reached Unhealthy for Sensitive Groups or worse, based on 210 monitored days in EPA's Air Quality System.
Is April a good time for outdoor exercise in Dayton?▾
A typical April day in Dayton sits in the Good range (median AQI 47), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of April days reached AQI 101+ in 2019–2025.
Which pollutant causes Dayton's April air quality problems?▾
Ground-level ozone set the daily AQI on 57.1% of April days in Dayton. The highest April AQI recorded in 2019–2025 was 90 (Moderate), in 2023.
Dayton April air quality, year by year
Dayton April air quality by year (Dayton, OH, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 30 | 48 | 0 | 69 | O3 |
| 2020 | 30 | 51 | 0 | 74 | PM2.5 |
| 2021 | 30 | 52 | 0 | 87 | PM2.5 |
| 2022cleanest | 30 | 42 | 0 | 55 | O3 |
| 2023worst | 30 | 52 | 0 | 90 | O3 |
| 2024 | 30 | 45 | 0 | 87 | O3 |
| 2025 | 30 | 45 | 0 | 67 | O3 |
What April air means in Dayton
A typical April day in Dayton sits in the Good range (median AQI 47), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of April days reached AQI 101+ in 2019–2025.
April's median AQI of 47 is below Dayton's whole-year median of 51, making it one of the area's cleaner periods. Nationally, the median April AQI across every EPA metro area (100,677 metro-days, 2019–2025) is 44, so Dayton runs in line with the national April norm; 0.0% of its April days topped AQI 100 versus 0.7% nationally (about the same).
April is part of Dayton's spring season (March, April, May); the spring 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.