Santa Rosa Air Quality in November
Across 2019–2025, Santa Rosa's November air quality had a median AQI of 33 (Good) over 210 monitored days in the Santa Rosa, CA area. 0.0% of November days (0 of 210) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 60.5% of days. The cleanest November on record here was 2025 (median AQI 7, 0 days above 100) and the worst was 2022 (median 49, 0 days above 100, peak AQI 68).
- Good: 78.1%
- Moderate: 21.9%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
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How is the air in Santa Rosa in November?
Good on a typical day: median AQI 33 across 2019–2025, with 0.0% of November days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓78.1% of November days were Good (AQI 0–50), 21.9% Moderate (51–100).
- ✓0 days of 210 reached AQI 101+; the November peak was 68.
- ✓Best November: 2025; worst November: 2022.
Frequently asked questions
What is the air quality like in Santa Rosa in November?▾
Across 2019–2025, the median daily AQI in Santa Rosa in November was 33 (Good). 78.1% of days were Good, 21.9% Moderate, and 0.0% reached Unhealthy for Sensitive Groups or worse, based on 210 monitored days in EPA's Air Quality System.
Is November a good time for outdoor exercise in Santa Rosa?▾
A typical November day in Santa Rosa sits in the Good range (median AQI 33), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of November days reached AQI 101+ in 2019–2025.
Which pollutant causes Santa Rosa's November air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 60.5% of November days in Santa Rosa. The highest November AQI recorded in 2019–2025 was 68 (Moderate), in 2022.
Santa Rosa November air quality, year by year
Santa Rosa November air quality by year (Santa Rosa, CA, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 30 | 38 | 0 | 60 | PM2.5 |
| 2020 | 30 | 34 | 0 | 58 | PM2.5 |
| 2021 | 30 | 46 | 0 | 61 | PM2.5 |
| 2022worst | 30 | 49 | 0 | 68 | PM2.5 |
| 2023 | 30 | 34 | 0 | 57 | PM2.5 |
| 2024 | 30 | 20 | 0 | 61 | PM2.5 |
| 2025cleanest | 30 | 7 | 0 | 13 | PM10 |
What November air means in Santa Rosa
A typical November day in Santa Rosa sits in the Good range (median AQI 33), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of November days reached AQI 101+ in 2019–2025.
November's median AQI of 33 is in line with Santa Rosa's whole-year median of 36, so this period is neither a clean nor a dirty stretch for the area. Nationally, the median November AQI across every EPA metro area (92,704 metro-days, 2019–2025) is 39, so Santa Rosa runs below the national November norm; 0.0% of its November days topped AQI 100 versus 0.6% nationally (about the same).
November is part of Santa Rosa's fall season (September, October, November); the fall 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.