Philadelphia Air Quality in June
Across 2019–2025, Philadelphia's June air quality had a median AQI of 61 (Moderate) over 210 monitored days in the Philadelphia-Camden-Wilmington, PA-NJ-DE-MD area. 15.2% of June days (32 of 210) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 51.4% of days. The cleanest June on record here was 2020 (median AQI 61, 1 day above 100) and the worst was 2023 (median 75, 10 days above 100, peak AQI 331).
- Good: 18.6%
- Moderate: 66.2%
- Unhealthy for Sensitive Groups: 11.9%
- Unhealthy or worse: 3.3%
Reduce Indoor Ozone in Philadelphia
Today's main pollutant in Philadelphia is ground-level ozone (AQI 44). 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, certain "ionizer" purifiers) and ventilating when outdoor ozone is low (early morning). A high-carbon unit helps with the gases and VOCs that linger indoors.
Recommended: Levoit Core 300 — True HEPA + activated carbon · CADR ~141 CFM · rooms up to 219 sq ft
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How is the air in Philadelphia in June?
Moderate on a typical day: median AQI 61 across 2019–2025, with 15.2% of June days above AQI 100. Ground-level ozone is the main driver.
- ✓18.6% of June days were Good (AQI 0–50), 66.2% Moderate (51–100).
- ✓32 days of 210 reached AQI 101+; the June peak was 331.
- ✓Best June: 2020; worst June: 2023.
Frequently asked questions
What is the air quality like in Philadelphia in June?▾
Across 2019–2025, the median daily AQI in Philadelphia in June was 61 (Moderate). 18.6% of days were Good, 66.2% Moderate, and 15.2% 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 Philadelphia?▾
A typical June day in Philadelphia is Moderate (median AQI 61): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and about 1 day in 7 of June days (15.2%) reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
Which pollutant causes Philadelphia's June air quality problems?▾
Ground-level ozone set the daily AQI on 51.4% of June days in Philadelphia. The highest June AQI recorded in 2019–2025 was 331 (Hazardous), in 2023.
Philadelphia June air quality, year by year
Philadelphia June air quality by year (Philadelphia-Camden-Wilmington, PA-NJ-DE-MD, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 30 | 58 | 3 | 136 | PM2.5 |
| 2020cleanest | 30 | 61 | 1 | 101 | PM2.5 |
| 2021 | 30 | 54 | 4 | 115 | PM2.5 |
| 2022 | 30 | 61 | 3 | 126 | O3 |
| 2023worst | 30 | 75 | 10 | 331 | PM2.5 |
| 2024 | 30 | 64 | 4 | 150 | O3 |
| 2025 | 30 | 65 | 7 | 161 | O3 |
What June air means in Philadelphia
A typical June day in Philadelphia is Moderate (median AQI 61): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and about 1 day in 7 of June days (15.2%) 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 61 is above Philadelphia's whole-year median of 56, 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 Philadelphia runs above the national June norm; 15.2% of its June days topped AQI 100 versus 3.7% nationally (above average).
June is part of Philadelphia's summer season (June, July, August); the summer page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Philadelphia
The latest EPA AirNow observation puts Philadelphia's AQI at 44 (O3). The figures above are multi-year month statistics, not today's reading.
View current Philadelphia air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Philadelphia-Camden-Wilmington, PA-NJ-DE-MD), 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.