Montgomery Air Quality in Winter
Across 2019–2025, Montgomery's winter (December–February) air quality had a median AQI of 46 (Good) over 570 monitored days in the Montgomery, AL area. 0.0% of winter days (0 of 570) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 99.8% of days. The cleanest winter on record here was 2024 (median AQI 37, 0 days above 100) and the worst was 2020 (median 55, 0 days above 100, peak AQI 72).
- Good: 56.1%
- Moderate: 43.9%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
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How is the air in Montgomery in winter?
Good on a typical day: median AQI 46 across 2019–2025, with 0.0% of winter days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓56.1% of winter days were Good (AQI 0–50), 43.9% Moderate (51–100).
- ✓0 days of 570 reached AQI 101+; the winter peak was 96.
- ✓Cleanest month: December; worst month: February.
Frequently asked questions
What is the air quality like in Montgomery in winter?▾
Across 2019–2025, the median daily AQI in Montgomery in winter was 46 (Good). 56.1% of days were Good, 43.9% Moderate, and 0.0% reached Unhealthy for Sensitive Groups or worse, based on 570 monitored days in EPA's Air Quality System.
Is winter a good time for outdoor exercise in Montgomery?▾
A typical winter day in Montgomery sits in the Good range (median AQI 46), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of winter days reached AQI 101+ in 2019–2025.
Which pollutant causes Montgomery's winter air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 99.8% of winter days in Montgomery. The highest winter AQI recorded in 2019–2025 was 96 (Moderate), in 2020.
Montgomery winter air quality, year by year
Montgomery winter air quality by year (Montgomery, AL, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 90 | 55 | 0 | 84 | PM2.5 |
| 2020worst | 88 | 55 | 0 | 72 | PM2.5 |
| 2021 | 79 | 41 | 0 | 65 | PM2.5 |
| 2022 | 90 | 42 | 0 | 96 | PM2.5 |
| 2023 | 56 | 39 | 0 | 74 | PM2.5 |
| 2024cleanest | 83 | 37 | 0 | 75 | PM2.5 |
| 2025 | 84 | 39 | 0 | 90 | PM2.5 |
What winter air means in Montgomery
A typical winter day in Montgomery sits in the Good range (median AQI 46), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of winter days reached AQI 101+ in 2019–2025.
Winter's median AQI of 46 is in line with Montgomery's whole-year median of 44, so this period is neither a clean nor a dirty stretch for the area. Nationally, the median Winter AQI across every EPA metro area (278,620 metro-days, 2019–2025) is 40, so Montgomery runs above the national Winter norm; 0.0% of its Winter days topped AQI 100 versus 0.6% nationally (about the same).
Within the season, December is the cleanest month (median AQI 41, 0.0% of days above 100) and February the worst (median 51, 0.0% above 100).
Activity-specific thresholds: running, cycling, kids' sports.
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.