Durham Air Quality in June
Across 2019–2025, Durham's June air quality had a median AQI of 50 (Good) over 210 monitored days in the Durham-Chapel Hill, NC area. 1.0% of June days (2 of 210) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 55.7% of days. The cleanest June on record here was 2021 (median AQI 39, 0 days above 100) and the worst was 2023 (median 69, 2 days above 100, peak AQI 121).
- Good: 51.9%
- Moderate: 47.1%
- Unhealthy for Sensitive Groups: 1.0%
- Unhealthy or worse: 0.0%
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How is the air in Durham in June?
Good on a typical day: median AQI 50 across 2019–2025, with 1.0% of June days above AQI 100. Ground-level ozone is the main driver.
- ✓51.9% of June days were Good (AQI 0–50), 47.1% Moderate (51–100).
- ✓2 days of 210 reached AQI 101+; the June peak was 121.
- ✓Best June: 2021; worst June: 2023.
Frequently asked questions
What is the air quality like in Durham in June?▾
Across 2019–2025, the median daily AQI in Durham in June was 50 (Good). 51.9% of days were Good, 47.1% Moderate, and 1.0% 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 Durham?▾
A typical June day in Durham sits in the Good range (median AQI 50), so running, cycling and children's outdoor play are fine for everyone on most days; about 1 day in 100 of June days (1.0%) reached AQI 101+ in 2019–2025.
Which pollutant causes Durham's June air quality problems?▾
Ground-level ozone set the daily AQI on 55.7% of June days in Durham. The highest June AQI recorded in 2019–2025 was 121 (Unhealthy for Sensitive Groups), in 2023.
Durham June air quality, year by year
Durham June air quality by year (Durham-Chapel Hill, NC, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 30 | 51 | 0 | 87 | O3 |
| 2020 | 30 | 45 | 0 | 97 | PM2.5 |
| 2021cleanest | 30 | 39 | 0 | 80 | O3 |
| 2022 | 30 | 50 | 0 | 93 | O3 |
| 2023worst | 30 | 69 | 2 | 121 | O3 |
| 2024 | 30 | 53 | 0 | 77 | PM2.5 |
| 2025 | 30 | 49 | 0 | 77 | PM2.5 |
What June air means in Durham
A typical June day in Durham sits in the Good range (median AQI 50), so running, cycling and children's outdoor play are fine for everyone on most days; about 1 day in 100 of June days (1.0%) reached AQI 101+ in 2019–2025.
June's median AQI of 50 is above Durham'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 Durham runs above the national June norm; 1.0% of its June days topped AQI 100 versus 3.7% nationally (below average).
June is part of Durham's summer season (June, July, August); the summer page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Durham
The latest EPA AirNow observation puts Durham's AQI at 41 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current Durham air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Durham-Chapel Hill, NC), 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.