Ann Arbor Air Quality in June
Across 2019–2025, Ann Arbor's June air quality had a median AQI of 51 (Moderate) over 210 monitored days in the Ann Arbor, MI area. 8.6% of June days (18 of 210) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 70.0% of days. The cleanest June on record here was 2024 (median AQI 45, 0 days above 100) and the worst was 2023 (median 93, 11 days above 100, peak AQI 218).
- Good: 46.2%
- Moderate: 45.2%
- Unhealthy for Sensitive Groups: 6.2%
- Unhealthy or worse: 2.4%
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How is the air in Ann Arbor in June?
Moderate on a typical day: median AQI 51 across 2019–2025, with 8.6% of June days above AQI 100. Ground-level ozone is the main driver.
- ✓46.2% of June days were Good (AQI 0–50), 45.2% Moderate (51–100).
- ✓18 days of 210 reached AQI 101+; the June peak was 218.
- ✓Best June: 2024; worst June: 2023.
Frequently asked questions
What is the air quality like in Ann Arbor in June?▾
Across 2019–2025, the median daily AQI in Ann Arbor in June was 51 (Moderate). 46.2% of days were Good, 45.2% Moderate, and 8.6% 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 Ann Arbor?▾
A typical June day in Ann Arbor is Moderate (median AQI 51): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and about 1 day in 12 of June days (8.6%) reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
Which pollutant causes Ann Arbor's June air quality problems?▾
Ground-level ozone set the daily AQI on 70.0% of June days in Ann Arbor. The highest June AQI recorded in 2019–2025 was 218 (Very Unhealthy), in 2023.
Ann Arbor June air quality, year by year
Ann Arbor June air quality by year (Ann Arbor, MI, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 30 | 49 | 0 | 80 | O3 |
| 2020 | 30 | 51 | 3 | 126 | O3 |
| 2021 | 30 | 49 | 0 | 100 | O3 |
| 2022 | 30 | 49 | 1 | 101 | O3 |
| 2023worst | 30 | 93 | 11 | 218 | PM2.5 |
| 2024cleanest | 30 | 45 | 0 | 80 | O3 |
| 2025 | 30 | 52 | 3 | 152 | PM2.5 |
What June air means in Ann Arbor
A typical June day in Ann Arbor is Moderate (median AQI 51): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and about 1 day in 12 of June days (8.6%) 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 51 is above Ann Arbor's whole-year median of 44, 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 Ann Arbor runs above the national June norm; 8.6% of its June days topped AQI 100 versus 3.7% nationally (above average).
June is part of Ann Arbor's summer season (June, July, August); the summer page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Ann Arbor
The latest EPA AirNow observation puts Ann Arbor's AQI at 29 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current Ann Arbor air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Ann Arbor, MI), 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.