Cincinnati Air Quality in August
Across 2019–2025, Cincinnati's August air quality had a median AQI of 58 (Moderate) over 217 monitored days in the Cincinnati, OH-KY-IN area. 6.5% of August days (14 of 217) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 63.6% of days. The cleanest August on record here was 2022 (median AQI 56, 0 days above 100) and the worst was 2023 (median 64, 4 days above 100, peak AQI 156).
- Good: 17.5%
- Moderate: 76.0%
- Unhealthy for Sensitive Groups: 6.0%
- Unhealthy or worse: 0.5%
Extra Protection for Cincinnati Homes
Air quality in Cincinnati is moderate (AQI 65), 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 Cincinnati in August?
Moderate on a typical day: median AQI 58 across 2019–2025, with 6.5% of August days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓17.5% of August days were Good (AQI 0–50), 76.0% Moderate (51–100).
- ✓14 days of 217 reached AQI 101+; the August peak was 156.
- ✓Best August: 2022; worst August: 2023.
Frequently asked questions
What is the air quality like in Cincinnati in August?▾
Across 2019–2025, the median daily AQI in Cincinnati in August was 58 (Moderate). 17.5% of days were Good, 76.0% Moderate, and 6.5% reached Unhealthy for Sensitive Groups or worse, based on 217 monitored days in EPA's Air Quality System.
Is August a good time for outdoor exercise in Cincinnati?▾
A typical August day in Cincinnati 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 15 of August days (6.5%) reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
Which pollutant causes Cincinnati's August air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 63.6% of August days in Cincinnati. The highest August AQI recorded in 2019–2025 was 156 (Unhealthy), in 2023.
Cincinnati August air quality, year by year
Cincinnati August air quality by year (Cincinnati, OH-KY-IN, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 31 | 61 | 2 | 105 | O3 |
| 2020 | 31 | 55 | 1 | 115 | PM2.5 |
| 2021 | 31 | 59 | 3 | 140 | PM2.5 |
| 2022cleanest | 31 | 56 | 0 | 87 | PM2.5 |
| 2023worst | 31 | 64 | 4 | 156 | PM2.5 |
| 2024 | 31 | 57 | 4 | 147 | O3 |
| 2025 | 31 | 56 | 0 | 84 | PM2.5 |
What August air means in Cincinnati
A typical August day in Cincinnati 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 15 of August days (6.5%) reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
August's median AQI of 58 is in line with Cincinnati's whole-year median of 56, so this period is neither a clean nor a dirty stretch for the area. Nationally, the median August AQI across every EPA metro area (104,152 metro-days, 2019–2025) is 45, so Cincinnati runs above the national August norm; 6.5% of its August days topped AQI 100 versus 3.5% nationally (above average).
August is part of Cincinnati's summer season (June, July, August); the summer page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Cincinnati
The latest EPA AirNow observation puts Cincinnati's AQI at 65 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current Cincinnati air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Cincinnati, OH-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.