San Diego Air Quality in June
Across 2019–2025, San Diego's June air quality had a median AQI of 71 (Moderate) over 210 monitored days in the San Diego-Carlsbad, CA area. 15.8% of June days (33 of 210) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 72.9% of days. The cleanest June on record here was 2021 (median AQI 71, 1 day above 100) and the worst was 2022 (median 89, 9 days above 100, peak AQI 143).
- Good: 8.6%
- Moderate: 75.7%
- Unhealthy for Sensitive Groups: 14.8%
- Unhealthy or worse: 1.0%
Extra Protection for San Diego Homes
Air quality in San Diego is moderate (AQI 54), with fine particles (PM2.5) the main concern. A True-HEPA purifier gives sensitive groups — kids, seniors and anyone with asthma or allergies — cleaner air indoors on days like today.
Recommended: Coway AP-1512HH Mighty — True HEPA + carbon · CADR ~246 CFM · rooms up to 361 sq ft
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How is the air in San Diego in June?
Moderate on a typical day: median AQI 71 across 2019–2025, with 15.8% of June days above AQI 100. Ground-level ozone is the main driver.
- ✓8.6% of June days were Good (AQI 0–50), 75.7% Moderate (51–100).
- ✓33 days of 210 reached AQI 101+; the June peak was 161.
- ✓Best June: 2021; worst June: 2022.
Frequently asked questions
What is the air quality like in San Diego in June?▾
Across 2019–2025, the median daily AQI in San Diego in June was 71 (Moderate). 8.6% of days were Good, 75.7% Moderate, and 15.8% 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 San Diego?▾
A typical June day in San Diego is Moderate (median AQI 71): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and about 1 day in 6 of June days (15.8%) reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
Which pollutant causes San Diego's June air quality problems?▾
Ground-level ozone set the daily AQI on 72.9% of June days in San Diego. The highest June AQI recorded in 2019–2025 was 161 (Unhealthy), in 2022.
San Diego June air quality, year by year
San Diego June air quality by year (San Diego-Carlsbad, CA, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 30 | 64 | 2 | 112 | PM2.5 |
| 2020 | 30 | 64 | 2 | 154 | PM2.5 |
| 2021cleanest | 30 | 71 | 1 | 126 | O3 |
| 2022worst | 30 | 89 | 9 | 143 | O3 |
| 2023 | 30 | 71 | 6 | 133 | O3 |
| 2024 | 30 | 84 | 6 | 112 | O3 |
| 2025 | 30 | 76 | 7 | 161 | O3 |
What June air means in San Diego
A typical June day in San Diego is Moderate (median AQI 71): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and about 1 day in 6 of June days (15.8%) 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 71 is above San Diego's whole-year median of 67, 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 San Diego runs above the national June norm; 15.8% of its June days topped AQI 100 versus 3.7% nationally (above average).
June is part of San Diego's summer season (June, July, August); the summer page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in San Diego
The latest EPA AirNow observation puts San Diego's AQI at 54 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current San Diego air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (San Diego-Carlsbad, CA), 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.