Montgomery Air Quality in Fall
Across 2019–2025, Montgomery's fall (September–November) air quality had a median AQI of 50 (Good) over 637 monitored days in the Montgomery, AL area. 0.0% of fall days (0 of 637) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 78.6% of days. The cleanest fall on record here was 2024 (median AQI 39, 0 days above 100) and the worst was 2019 (median 60, 0 days above 100, peak AQI 82).
- Good: 50.5%
- Moderate: 49.5%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
Reduce Indoor Ozone in Montgomery
Today's main pollutant in Montgomery is ground-level ozone (AQI 30). 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.
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How is the air in Montgomery in fall?
Good on a typical day: median AQI 50 across 2019–2025, with 0.0% of fall days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓50.5% of fall days were Good (AQI 0–50), 49.5% Moderate (51–100).
- ✓0 days of 637 reached AQI 101+; the fall peak was 90.
- ✓Cleanest month: October; worst month: November.
Frequently asked questions
What is the air quality like in Montgomery in fall?▾
Across 2019–2025, the median daily AQI in Montgomery in fall was 50 (Good). 50.5% of days were Good, 49.5% Moderate, and 0.0% reached Unhealthy for Sensitive Groups or worse, based on 637 monitored days in EPA's Air Quality System.
Is fall a good time for outdoor exercise in Montgomery?▾
A typical fall day in Montgomery sits in the Good range (median AQI 50), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of fall days reached AQI 101+ in 2019–2025.
Which pollutant causes Montgomery's fall air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 78.6% of fall days in Montgomery. The highest fall AQI recorded in 2019–2025 was 90 (Moderate), in 2019.
Montgomery fall air quality, year by year
Montgomery fall air quality by year (Montgomery, AL, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019worst | 91 | 60 | 0 | 82 | PM2.5 |
| 2020 | 91 | 57 | 0 | 85 | PM2.5 |
| 2021 | 91 | 42 | 0 | 64 | PM2.5 |
| 2022 | 91 | 41 | 0 | 74 | PM2.5 |
| 2023 | 91 | 51 | 0 | 69 | PM2.5 |
| 2024cleanest | 91 | 39 | 0 | 71 | PM2.5 |
| 2025 | 91 | 47 | 0 | 90 | PM2.5 |
What fall air means in Montgomery
A typical fall day in Montgomery sits in the Good range (median AQI 50), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of fall days reached AQI 101+ in 2019–2025.
Fall's median AQI of 50 is above Montgomery's whole-year median of 44, making it one of the area's dirtier periods. Nationally, the median Fall AQI across every EPA metro area (296,275 metro-days, 2019–2025) is 40, so Montgomery runs above the national Fall norm; 0.0% of its Fall days topped AQI 100 versus 1.5% nationally (below average).
Within the season, October is the cleanest month (median AQI 46, 0.0% of days above 100) and November the worst (median 52, 0.0% above 100).
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Montgomery
The latest EPA AirNow observation puts Montgomery's AQI at 30 (O3). The figures above are multi-year season statistics, not today's reading.
View current Montgomery air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Montgomery, AL), 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.