Mesa Air Quality in November
Across 2019–2025, Mesa's November air quality had a median AQI of 79 (Moderate) over 210 monitored days in the Phoenix-Mesa-Scottsdale, AZ area. 15.2% of November days (32 of 210) reached Unhealthy for Sensitive Groups or worse, and coarse dust (PM10) set the daily AQI on 59.0% of days. The cleanest November on record here was 2022 (median AQI 73, 0 days above 100) and the worst was 2020 (median 95, 13 days above 100, peak AQI 522).
- Good: 8.6%
- Moderate: 76.2%
- Unhealthy for Sensitive Groups: 13.8%
- Unhealthy or worse: 1.4%
Reduce Indoor Ozone in Mesa
Today's main pollutant in Mesa is ground-level ozone (AQI 37). Important: standard HEPA filters do NOT remove ozone — only a purifier with a substantial activated-carbon bed adsorbs it. The biggest wins are cutting indoor sources (gas appliances, certain "ionizer" purifiers) and ventilating when outdoor ozone is low (early morning). A high-carbon unit helps with the gases and VOCs that linger indoors.
Recommended: Levoit Core 300 — True HEPA + activated carbon · CADR ~141 CFM · rooms up to 219 sq ft
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How is the air in Mesa in November?
Moderate on a typical day: median AQI 79 across 2019–2025, with 15.2% of November days above AQI 100. Coarse dust (PM10) is the main driver.
- ✓8.6% of November days were Good (AQI 0–50), 76.2% Moderate (51–100).
- ✓32 days of 210 reached AQI 101+; the November peak was 522.
- ✓Best November: 2022; worst November: 2020.
Frequently asked questions
What is the air quality like in Mesa in November?▾
Across 2019–2025, the median daily AQI in Mesa in November was 79 (Moderate). 8.6% of days were Good, 76.2% Moderate, and 15.2% 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 Mesa?▾
A typical November day in Mesa is Moderate (median AQI 79): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and about 1 day in 7 of November days (15.2%) reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
Which pollutant causes Mesa's November air quality problems?▾
Coarse dust (PM10) set the daily AQI on 59.0% of November days in Mesa. The highest November AQI recorded in 2019–2025 was 522 (Hazardous), in 2020.
Mesa November air quality, year by year
Mesa November air quality by year (Phoenix-Mesa-Scottsdale, AZ, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 30 | 79 | 4 | 143 | PM10 |
| 2020worst | 30 | 95 | 13 | 522 | PM10 |
| 2021 | 30 | 86 | 6 | 125 | PM10 |
| 2022cleanest | 30 | 73 | 0 | 89 | PM10 |
| 2023 | 30 | 72 | 2 | 111 | PM10 |
| 2024 | 30 | 85 | 6 | 166 | PM10 |
| 2025 | 30 | 74 | 1 | 139 | PM2.5 |
What November air means in Mesa
A typical November day in Mesa is Moderate (median AQI 79): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and about 1 day in 7 of November days (15.2%) reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
November's median AQI of 79 is in line with Mesa's whole-year median of 79, 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 Mesa runs above the national November norm; 15.2% of its November days topped AQI 100 versus 0.6% nationally (above average).
November is part of Mesa's fall season (September, October, November); the fall page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Mesa
The latest EPA AirNow observation puts Mesa's AQI at 37 (O3). The figures above are multi-year month statistics, not today's reading.
View current Mesa air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Phoenix-Mesa-Scottsdale, AZ), 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.