Dayton Air Quality in February
Across 2019–2025, Dayton's February air quality had a median AQI of 53 (Moderate) over 198 monitored days in the Dayton, OH area. 0.0% of February days (0 of 198) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 86.4% of days. The cleanest February on record here was 2023 (median AQI 48, 0 days above 100) and the worst was 2021 (median 59, 0 days above 100, peak AQI 96).
- Good: 42.9%
- Moderate: 57.1%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
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How is the air in Dayton in February?
Moderate on a typical day: median AQI 53 across 2019–2025, with 0.0% of February days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓42.9% of February days were Good (AQI 0–50), 57.1% Moderate (51–100).
- ✓0 days of 198 reached AQI 101+; the February peak was 96.
- ✓Best February: 2023; worst February: 2021.
Frequently asked questions
What is the air quality like in Dayton in February?▾
Across 2019–2025, the median daily AQI in Dayton in February was 53 (Moderate). 42.9% of days were Good, 57.1% Moderate, and 0.0% reached Unhealthy for Sensitive Groups or worse, based on 198 monitored days in EPA's Air Quality System.
Is February a good time for outdoor exercise in Dayton?▾
A typical February day in Dayton is Moderate (median AQI 53): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and fewer than 1% of February days 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 February air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 86.4% of February days in Dayton. The highest February AQI recorded in 2019–2025 was 96 (Moderate), in 2021.
Dayton February air quality, year by year
Dayton February air quality by year (Dayton, OH, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 28 | 56 | 0 | 95 | PM2.5 |
| 2020 | 29 | 54 | 0 | 69 | PM2.5 |
| 2021worst | 28 | 59 | 0 | 96 | PM2.5 |
| 2022 | 28 | 50 | 0 | 67 | PM2.5 |
| 2023cleanest | 28 | 48 | 0 | 69 | PM2.5 |
| 2024 | 29 | 52 | 0 | 77 | PM2.5 |
| 2025 | 28 | 50 | 0 | 67 | PM2.5 |
What February air means in Dayton
A typical February day in Dayton is Moderate (median AQI 53): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and fewer than 1% of February days reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
February's median AQI of 53 is in line with Dayton's whole-year median of 51, so this period is neither a clean nor a dirty stretch for the area. Nationally, the median February AQI across every EPA metro area (87,428 metro-days, 2019–2025) is 41, so Dayton runs above the national February norm; 0.0% of its February days topped AQI 100 versus 0.4% nationally (about the same).
February is part of Dayton's winter season (December, January, February); the winter 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.