Houston Air Quality in November
Across 2019–2025, Houston's November air quality had a median AQI of 57 (Moderate) over 210 monitored days in the Houston-The Woodlands-Sugar Land, TX 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 82.9% of days. The cleanest November on record here was 2020 (median AQI 53, 0 days above 100) and the worst was 2021 (median 65, 0 days above 100, peak AQI 78).
- Good: 21.4%
- Moderate: 78.6%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
Extra Protection for Houston Homes
Air quality in Houston is moderate (AQI 57), 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 Houston in November?
Moderate on a typical day: median AQI 57 across 2019–2025, with 0.0% of November days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓21.4% of November days were Good (AQI 0–50), 78.6% Moderate (51–100).
- ✓0 days of 210 reached AQI 101+; the November peak was 96.
- ✓Best November: 2020; worst November: 2021.
Frequently asked questions
What is the air quality like in Houston in November?▾
Across 2019–2025, the median daily AQI in Houston in November was 57 (Moderate). 21.4% of days were Good, 78.6% 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 Houston?▾
A typical November day in Houston is Moderate (median AQI 57): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and fewer than 1% of November days reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
Which pollutant causes Houston's November air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 82.9% of November days in Houston. The highest November AQI recorded in 2019–2025 was 96 (Moderate), in 2021.
Houston November air quality, year by year
Houston November air quality by year (Houston-The Woodlands-Sugar Land, TX, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 30 | 59 | 0 | 96 | PM2.5 |
| 2020cleanest | 30 | 53 | 0 | 74 | PM2.5 |
| 2021worst | 30 | 65 | 0 | 78 | PM2.5 |
| 2022 | 30 | 57 | 0 | 87 | PM2.5 |
| 2023 | 30 | 55 | 0 | 94 | PM2.5 |
| 2024 | 30 | 58 | 0 | 84 | PM2.5 |
| 2025 | 30 | 54 | 0 | 77 | PM2.5 |
What November air means in Houston
A typical November day in Houston is Moderate (median AQI 57): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and fewer than 1% of November days 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 57 is below Houston's whole-year median of 61, making it one of the area's cleaner periods. Nationally, the median November AQI across every EPA metro area (92,704 metro-days, 2019–2025) is 39, so Houston runs above the national November norm; 0.0% of its November days topped AQI 100 versus 0.6% nationally (about the same).
November is part of Houston's fall season (September, October, November); the fall page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Houston
The latest EPA AirNow observation puts Houston's AQI at 57 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current Houston air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Houston-The Woodlands-Sugar Land, TX), 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.