Brownsville Air Quality in November
Across 2019–2025, Brownsville's November air quality had a median AQI of 41 (Good) over 210 monitored days in the Brownsville-Harlingen, TX area. 0.5% of November days (1 of 210) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 63.8% of days. The cleanest November on record here was 2022 (median AQI 36, 0 days above 100) and the worst was 2024 (median 63, 1 day above 100, peak AQI 101).
- Good: 66.2%
- Moderate: 33.3%
- Unhealthy for Sensitive Groups: 0.5%
- Unhealthy or worse: 0.0%
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How is the air in Brownsville in November?
Good on a typical day: median AQI 41 across 2019–2025, with 0.5% of November days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓66.2% of November days were Good (AQI 0–50), 33.3% Moderate (51–100).
- ✓1 day of 210 reached AQI 101+; the November peak was 101.
- ✓Best November: 2022; worst November: 2024.
Frequently asked questions
What is the air quality like in Brownsville in November?▾
Across 2019–2025, the median daily AQI in Brownsville in November was 41 (Good). 66.2% of days were Good, 33.3% Moderate, and 0.5% 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 Brownsville?▾
A typical November day in Brownsville sits in the Good range (median AQI 41), 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 Brownsville's November air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 63.8% of November days in Brownsville. The highest November AQI recorded in 2019–2025 was 101 (Unhealthy for Sensitive Groups), in 2024.
Brownsville November air quality, year by year
Brownsville November air quality by year (Brownsville-Harlingen, TX, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 30 | 50 | 0 | 79 | PM2.5 |
| 2020 | 30 | 38 | 0 | 63 | O3 |
| 2021 | 30 | 40 | 0 | 61 | O3 |
| 2022cleanest | 30 | 36 | 0 | 68 | PM2.5 |
| 2023 | 30 | 38 | 0 | 66 | O3 |
| 2024worst | 30 | 63 | 1 | 101 | PM2.5 |
| 2025 | 30 | 46 | 0 | 86 | PM2.5 |
What November air means in Brownsville
A typical November day in Brownsville sits in the Good range (median AQI 41), 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 41 is below Brownsville's whole-year median of 52, 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 Brownsville runs in line with the national November norm; 0.5% of its November days topped AQI 100 versus 0.6% nationally (about the same).
November is part of Brownsville's fall season (September, October, November); the fall page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Brownsville
The latest EPA AirNow observation puts Brownsville's AQI at 47 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current Brownsville air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Brownsville-Harlingen, 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.