Toledo Air Quality in Summer
Across 2019–2025, Toledo's summer (June–August) air quality had a median AQI of 54 (Moderate) over 644 monitored days in the Toledo, OH area. 5.9% of summer days (38 of 644) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 51.2% of days. The cleanest summer on record here was 2019 (median AQI 51, 1 day above 100) and the worst was 2023 (median 60, 12 days above 100, peak AQI 190).
- Good: 36.3%
- Moderate: 57.8%
- Unhealthy for Sensitive Groups: 5.4%
- Unhealthy or worse: 0.5%
Improve Indoor Air Quality
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How is the air in Toledo in summer?
Moderate on a typical day: median AQI 54 across 2019–2025, with 5.9% of summer days above AQI 100. Ground-level ozone is the main driver.
- ✓36.3% of summer days were Good (AQI 0–50), 57.8% Moderate (51–100).
- ✓38 days of 644 reached AQI 101+; the summer peak was 190.
- ✓Cleanest month: August; worst month: June.
Frequently asked questions
What is the air quality like in Toledo in summer?▾
Across 2019–2025, the median daily AQI in Toledo in summer was 54 (Moderate). 36.3% of days were Good, 57.8% Moderate, and 5.9% reached Unhealthy for Sensitive Groups or worse, based on 644 monitored days in EPA's Air Quality System.
Is summer a good time for outdoor exercise in Toledo?▾
A typical summer day in Toledo is Moderate (median AQI 54): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and about 1 day in 17 of summer days (5.9%) reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
Which pollutant causes Toledo's summer air quality problems?▾
Ground-level ozone set the daily AQI on 51.2% of summer days in Toledo. The highest summer AQI recorded in 2019–2025 was 190 (Unhealthy), in 2023.
Toledo summer air quality, year by year
Toledo summer air quality by year (Toledo, OH, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019cleanest | 92 | 51 | 1 | 143 | O3 |
| 2020 | 92 | 53 | 8 | 136 | O3 |
| 2021 | 92 | 56 | 1 | 119 | PM2.5 |
| 2022 | 92 | 52 | 4 | 119 | O3 |
| 2023worst | 92 | 60 | 12 | 190 | O3 |
| 2024 | 92 | 58 | 4 | 119 | O3 |
| 2025 | 92 | 61 | 8 | 154 | PM2.5 |
What summer air means in Toledo
A typical summer day in Toledo is Moderate (median AQI 54): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and about 1 day in 17 of summer days (5.9%) reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
Summer's median AQI of 54 is above Toledo's whole-year median of 45, making it one of the area's dirtier periods. Nationally, the median Summer AQI across every EPA metro area (308,645 metro-days, 2019–2025) is 46, so Toledo runs above the national Summer norm; 5.9% of its Summer days topped AQI 100 versus 3.6% nationally (above average).
Within the season, August is the cleanest month (median AQI 52, 2.8% of days above 100) and June the worst (median 58, 9.1% above 100).
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Toledo
The latest EPA AirNow observation puts Toledo's AQI at 33 (PM2.5). The figures above are multi-year season statistics, not today's reading.
View current Toledo air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Toledo, 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.