Montgomery Air Quality in May
Across 2019–2025, Montgomery's May air quality had a median AQI of 50 (Good) over 217 monitored days in the Montgomery, AL area. 0.0% of May days (0 of 217) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 65.0% of days. The cleanest May on record here was 2025 (median AQI 43, 0 days above 100) and the worst was 2020 (median 59, 0 days above 100, peak AQI 69).
- Good: 50.2%
- Moderate: 49.8%
- 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.
Recommended: Levoit Core 300 — True HEPA + activated carbon · CADR ~141 CFM · rooms up to 219 sq ft
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How is the air in Montgomery in May?
Good on a typical day: median AQI 50 across 2019–2025, with 0.0% of May days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓50.2% of May days were Good (AQI 0–50), 49.8% Moderate (51–100).
- ✓0 days of 217 reached AQI 101+; the May peak was 93.
- ✓Best May: 2025; worst May: 2020.
Frequently asked questions
What is the air quality like in Montgomery in May?▾
Across 2019–2025, the median daily AQI in Montgomery in May was 50 (Good). 50.2% of days were Good, 49.8% Moderate, and 0.0% reached Unhealthy for Sensitive Groups or worse, based on 217 monitored days in EPA's Air Quality System.
Is May a good time for outdoor exercise in Montgomery?▾
A typical May 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 May days reached AQI 101+ in 2019–2025.
Which pollutant causes Montgomery's May air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 65.0% of May days in Montgomery. The highest May AQI recorded in 2019–2025 was 93 (Moderate), in 2020.
Montgomery May air quality, year by year
Montgomery May air quality by year (Montgomery, AL, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 31 | 59 | 0 | 76 | PM2.5 |
| 2020worst | 31 | 59 | 0 | 69 | PM2.5 |
| 2021 | 31 | 45 | 0 | 93 | O3 |
| 2022 | 31 | 44 | 0 | 67 | O3 |
| 2023 | 31 | 56 | 0 | 84 | PM2.5 |
| 2024 | 31 | 45 | 0 | 55 | O3 |
| 2025cleanest | 31 | 43 | 0 | 55 | PM2.5 |
What May air means in Montgomery
A typical May 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 May days reached AQI 101+ in 2019–2025.
May'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 May AQI across every EPA metro area (104,064 metro-days, 2019–2025) is 44, so Montgomery runs above the national May norm; 0.0% of its May days topped AQI 100 versus 1.3% nationally (below average).
May is part of Montgomery's spring season (March, April, May); the spring 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.