Rochester Air Quality in June
Across 2019–2025, Rochester's June air quality had a median AQI of 46 (Good) over 210 monitored days in the Rochester, NY area. 5.3% of June days (11 of 210) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 59.5% of days. The cleanest June on record here was 2019 (median AQI 43, 0 days above 100) and the worst was 2023 (median 65, 7 days above 100, peak AQI 176).
- Good: 61.0%
- Moderate: 33.8%
- Unhealthy for Sensitive Groups: 2.9%
- Unhealthy or worse: 2.4%
Reducing Indoor Ozone
Important: standard HEPA filters do NOT remove ozone — only a purifier with a substantial activated-carbon bed adsorbs it. The biggest wins are cutting indoor sources (gas appliances, "ionizer" purifiers) and ventilating when outdoor ozone is low (early morning). A high-carbon unit also helps with the gases and VOCs that linger indoors.
Recommended: Coway AP-1512HH (HEPA + Carbon) — True HEPA + activated carbon layer · rooms up to 361 sq ft
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How is the air in Rochester in June?
Good on a typical day: median AQI 46 across 2019–2025, with 5.3% of June days above AQI 100. Ground-level ozone is the main driver.
- ✓61.0% of June days were Good (AQI 0–50), 33.8% Moderate (51–100).
- ✓11 days of 210 reached AQI 101+; the June peak was 176.
- ✓Best June: 2019; worst June: 2023.
Frequently asked questions
What is the air quality like in Rochester in June?▾
Across 2019–2025, the median daily AQI in Rochester in June was 46 (Good). 61.0% of days were Good, 33.8% Moderate, and 5.3% 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 Rochester?▾
A typical June day in Rochester sits in the Good range (median AQI 46), so running, cycling and children's outdoor play are fine for everyone on most days; about 1 day in 19 of June days (5.3%) reached AQI 101+ in 2019–2025.
Which pollutant causes Rochester's June air quality problems?▾
Ground-level ozone set the daily AQI on 59.5% of June days in Rochester. The highest June AQI recorded in 2019–2025 was 176 (Unhealthy), in 2023.
Rochester June air quality, year by year
Rochester June air quality by year (Rochester, NY, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019cleanest | 30 | 43 | 0 | 90 | O3 |
| 2020 | 30 | 44 | 0 | 71 | O3 |
| 2021 | 30 | 48 | 0 | 97 | O3 |
| 2022 | 30 | 42 | 2 | 126 | O3 |
| 2023worst | 30 | 65 | 7 | 176 | PM2.5 |
| 2024 | 30 | 48 | 0 | 74 | PM2.5 |
| 2025 | 30 | 47 | 2 | 135 | PM2.5 |
What June air means in Rochester
A typical June day in Rochester sits in the Good range (median AQI 46), so running, cycling and children's outdoor play are fine for everyone on most days; about 1 day in 19 of June days (5.3%) reached AQI 101+ in 2019–2025.
June's median AQI of 46 is above Rochester's whole-year median of 42, 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 Rochester runs in line with the national June norm; 5.3% of its June days topped AQI 100 versus 3.7% nationally (above average).
June is part of Rochester's summer season (June, July, August); the summer page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Rochester, NY), 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.