Santa Rosa Air Quality in June
Across 2019–2025, Santa Rosa's June air quality had a median AQI of 28 (Good) over 210 monitored days in the Santa Rosa, CA area. 0.0% of June days (0 of 210) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 43.8% of days. The cleanest June on record here was 2025 (median AQI 15, 0 days above 100) and the worst was 2019 (median 38, 0 days above 100, peak AQI 87).
- Good: 91.0%
- Moderate: 9.0%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
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How is the air in Santa Rosa in June?
Good on a typical day: median AQI 28 across 2019–2025, with 0.0% of June days above AQI 100. Ground-level ozone is the main driver.
- ✓91.0% of June days were Good (AQI 0–50), 9.0% Moderate (51–100).
- ✓0 days of 210 reached AQI 101+; the June peak was 87.
- ✓Best June: 2025; worst June: 2019.
Frequently asked questions
What is the air quality like in Santa Rosa in June?▾
Across 2019–2025, the median daily AQI in Santa Rosa in June was 28 (Good). 91.0% of days were Good, 9.0% Moderate, and 0.0% 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 Santa Rosa?▾
A typical June day in Santa Rosa sits in the Good range (median AQI 28), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of June days reached AQI 101+ in 2019–2025.
Which pollutant causes Santa Rosa's June air quality problems?▾
Ground-level ozone set the daily AQI on 43.8% of June days in Santa Rosa. The highest June AQI recorded in 2019–2025 was 87 (Moderate), in 2019.
Santa Rosa June air quality, year by year
Santa Rosa June air quality by year (Santa Rosa, CA, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019worst | 30 | 38 | 0 | 87 | O3 |
| 2020 | 30 | 31 | 0 | 55 | PM2.5 |
| 2021 | 30 | 29 | 0 | 59 | O3 |
| 2022 | 30 | 29 | 0 | 51 | O3 |
| 2023 | 30 | 27 | 0 | 49 | O3 |
| 2024 | 30 | 20 | 0 | 64 | PM10 |
| 2025cleanest | 30 | 15 | 0 | 31 | PM10 |
What June air means in Santa Rosa
A typical June day in Santa Rosa sits in the Good range (median AQI 28), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of June days reached AQI 101+ in 2019–2025.
June's median AQI of 28 is below Santa Rosa's whole-year median of 36, making it one of the area's cleaner periods. Nationally, the median June AQI across every EPA metro area (100,635 metro-days, 2019–2025) is 46, so Santa Rosa runs below the national June norm; 0.0% of its June days topped AQI 100 versus 3.7% nationally (below average).
June is part of Santa Rosa's summer season (June, July, August); the summer page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Santa Rosa
The latest EPA AirNow observation puts Santa Rosa's AQI at 36 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current Santa Rosa air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Santa Rosa, 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.