McAllen Air Quality in August
Across 2019–2025, McAllen's August air quality had a median AQI of 51 (Moderate) over 217 monitored days in the McAllen-Edinburg-Mission, TX area. 0.0% of August days (0 of 217) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 92.6% of days. The cleanest August on record here was 2020 (median AQI 43, 0 days above 100) and the worst was 2019 (median 57, 0 days above 100, peak AQI 67).
- Good: 49.3%
- Moderate: 50.7%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
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How is the air in McAllen in August?
Moderate on a typical day: median AQI 51 across 2019–2025, with 0.0% of August days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓49.3% of August days were Good (AQI 0–50), 50.7% Moderate (51–100).
- ✓0 days of 217 reached AQI 101+; the August peak was 73.
- ✓Best August: 2020; worst August: 2019.
Frequently asked questions
What is the air quality like in McAllen in August?▾
Across 2019–2025, the median daily AQI in McAllen in August was 51 (Moderate). 49.3% of days were Good, 50.7% Moderate, and 0.0% reached Unhealthy for Sensitive Groups or worse, based on 217 monitored days in EPA's Air Quality System.
Is August a good time for outdoor exercise in McAllen?▾
A typical August day in McAllen is Moderate (median AQI 51): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and fewer than 1% of August 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 McAllen's August air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 92.6% of August days in McAllen. The highest August AQI recorded in 2019–2025 was 73 (Moderate), in 2019.
McAllen August air quality, year by year
McAllen August air quality by year (McAllen-Edinburg-Mission, TX, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019worst | 31 | 57 | 0 | 67 | PM2.5 |
| 2020cleanest | 31 | 43 | 0 | 66 | PM2.5 |
| 2021 | 31 | 52 | 0 | 73 | PM2.5 |
| 2022 | 31 | 45 | 0 | 70 | PM2.5 |
| 2023 | 31 | 53 | 0 | 63 | PM2.5 |
| 2024 | 31 | 53 | 0 | 71 | PM2.5 |
| 2025 | 31 | 45 | 0 | 65 | PM2.5 |
What August air means in McAllen
A typical August day in McAllen is Moderate (median AQI 51): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and fewer than 1% of August days reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
August's median AQI of 51 is in line with McAllen's whole-year median of 50, so this period is neither a clean nor a dirty stretch for the area. Nationally, the median August AQI across every EPA metro area (104,152 metro-days, 2019–2025) is 45, so McAllen runs above the national August norm; 0.0% of its August days topped AQI 100 versus 3.5% nationally (below average).
August is part of McAllen's summer season (June, July, August); the summer page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in McAllen
The latest EPA AirNow observation puts McAllen's AQI at 43 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current McAllen air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (McAllen-Edinburg-Mission, 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.