Baltimore Air Quality in June
Across 2019–2025, Baltimore's June air quality had a median AQI of 54 (Moderate) over 210 monitored days in the Baltimore-Columbia-Towson, MD area. 11.9% of June days (25 of 210) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 73.3% of days. The cleanest June on record here was 2020 (median AQI 50, 1 day above 100) and the worst was 2023 (median 73, 8 days above 100, peak AQI 205).
- Good: 41.4%
- Moderate: 46.7%
- Unhealthy for Sensitive Groups: 10.0%
- Unhealthy or worse: 1.9%
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How is the air in Baltimore in June?
Moderate on a typical day: median AQI 54 across 2019–2025, with 11.9% of June days above AQI 100. Ground-level ozone is the main driver.
- ✓41.4% of June days were Good (AQI 0–50), 46.7% Moderate (51–100).
- ✓25 days of 210 reached AQI 101+; the June peak was 205.
- ✓Best June: 2020; worst June: 2023.
Frequently asked questions
What is the air quality like in Baltimore in June?▾
Across 2019–2025, the median daily AQI in Baltimore in June was 54 (Moderate). 41.4% of days were Good, 46.7% Moderate, and 11.9% 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 Baltimore?▾
A typical June day in Baltimore 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 8 of June days (11.9%) reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
Which pollutant causes Baltimore's June air quality problems?▾
Ground-level ozone set the daily AQI on 73.3% of June days in Baltimore. The highest June AQI recorded in 2019–2025 was 205 (Very Unhealthy), in 2023.
Baltimore June air quality, year by year
Baltimore June air quality by year (Baltimore-Columbia-Towson, MD, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 30 | 51 | 3 | 150 | O3 |
| 2020cleanest | 30 | 50 | 1 | 105 | O3 |
| 2021 | 30 | 51 | 4 | 122 | O3 |
| 2022 | 30 | 58 | 1 | 122 | O3 |
| 2023worst | 30 | 73 | 8 | 205 | O3 |
| 2024 | 30 | 63 | 4 | 122 | O3 |
| 2025 | 30 | 54 | 4 | 143 | O3 |
What June air means in Baltimore
A typical June day in Baltimore 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 8 of June days (11.9%) 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 54 is above Baltimore's whole-year median of 49, 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 Baltimore runs above the national June norm; 11.9% of its June days topped AQI 100 versus 3.7% nationally (above average).
June is part of Baltimore's summer season (June, July, August); the summer page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Baltimore
The latest EPA AirNow observation puts Baltimore's AQI at 43 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current Baltimore air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Baltimore-Columbia-Towson, 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.