Montgomery Air Quality in December
Across 2019–2025, Montgomery's December air quality had a median AQI of 41 (Good) over 214 monitored days in the Montgomery, AL area. 0.0% of December days (0 of 214) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 100.0% of days. The cleanest December on record here was 2021 (median AQI 32, 0 days above 100) and the worst was 2020 (median 60, 0 days above 100, peak AQI 72).
- Good: 61.7%
- Moderate: 38.3%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
Reduce Indoor Ozone in Montgomery
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How is the air in Montgomery in December?
Good on a typical day: median AQI 41 across 2019–2025, with 0.0% of December days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓61.7% of December days were Good (AQI 0–50), 38.3% Moderate (51–100).
- ✓0 days of 214 reached AQI 101+; the December peak was 84.
- ✓Best December: 2021; worst December: 2020.
Frequently asked questions
What is the air quality like in Montgomery in December?▾
Across 2019–2025, the median daily AQI in Montgomery in December was 41 (Good). 61.7% of days were Good, 38.3% Moderate, and 0.0% reached Unhealthy for Sensitive Groups or worse, based on 214 monitored days in EPA's Air Quality System.
Is December a good time for outdoor exercise in Montgomery?▾
A typical December day in Montgomery 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 December days reached AQI 101+ in 2019–2025.
Which pollutant causes Montgomery's December air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 100.0% of December days in Montgomery. The highest December AQI recorded in 2019–2025 was 84 (Moderate), in 2020.
Montgomery December air quality, year by year
Montgomery December air quality by year (Montgomery, AL, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 31 | 53 | 0 | 84 | PM2.5 |
| 2020worst | 31 | 60 | 0 | 72 | PM2.5 |
| 2021cleanest | 31 | 32 | 0 | 64 | PM2.5 |
| 2022 | 31 | 36 | 0 | 56 | PM2.5 |
| 2023 | 28 | 34 | 0 | 61 | PM2.5 |
| 2024 | 31 | 32 | 0 | 58 | PM2.5 |
| 2025 | 31 | 36 | 0 | 60 | PM2.5 |
What December air means in Montgomery
A typical December day in Montgomery 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 December days reached AQI 101+ in 2019–2025.
December's median AQI of 41 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 December AQI across every EPA metro area (95,590 metro-days, 2019–2025) is 39, so Montgomery runs in line with the national December norm; 0.0% of its December days topped AQI 100 versus 0.7% nationally (about the same).
December is part of Montgomery's winter season (December, January, February); the winter page pools all three months.
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 month 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.