Jacksonville Air Quality in May
Across 2019–2025, Jacksonville's May air quality had a median AQI of 53 (Moderate) over 217 monitored days in the Jacksonville, FL area. 1.4% of May days (3 of 217) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 62.7% of days. The cleanest May on record here was 2020 (median AQI 49, 0 days above 100) and the worst was 2025 (median 52, 3 days above 100, peak AQI 136).
- Good: 35.5%
- Moderate: 63.1%
- Unhealthy for Sensitive Groups: 1.4%
- Unhealthy or worse: 0.0%
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How is the air in Jacksonville in May?
Moderate on a typical day: median AQI 53 across 2019–2025, with 1.4% of May days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓35.5% of May days were Good (AQI 0–50), 63.1% Moderate (51–100).
- ✓3 days of 217 reached AQI 101+; the May peak was 136.
- ✓Best May: 2020; worst May: 2025.
Frequently asked questions
What is the air quality like in Jacksonville in May?▾
Across 2019–2025, the median daily AQI in Jacksonville in May was 53 (Moderate). 35.5% of days were Good, 63.1% Moderate, and 1.4% 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 Jacksonville?▾
A typical May day in Jacksonville is Moderate (median AQI 53): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and about 1 day in 71 of May days (1.4%) reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
Which pollutant causes Jacksonville's May air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 62.7% of May days in Jacksonville. The highest May AQI recorded in 2019–2025 was 136 (Unhealthy for Sensitive Groups), in 2025.
Jacksonville May air quality, year by year
Jacksonville May air quality by year (Jacksonville, FL, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 31 | 53 | 0 | 77 | PM2.5 |
| 2020cleanest | 31 | 49 | 0 | 84 | PM2.5 |
| 2021 | 31 | 55 | 0 | 71 | O3 |
| 2022 | 31 | 54 | 0 | 87 | PM2.5 |
| 2023 | 31 | 55 | 0 | 77 | PM2.5 |
| 2024 | 31 | 52 | 0 | 87 | O3 |
| 2025worst | 31 | 52 | 3 | 136 | PM2.5 |
What May air means in Jacksonville
A typical May day in Jacksonville is Moderate (median AQI 53): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and about 1 day in 71 of May days (1.4%) reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
May's median AQI of 53 is in line with Jacksonville's whole-year median of 52, so this period is neither a clean nor a dirty stretch for the area. Nationally, the median May AQI across every EPA metro area (104,064 metro-days, 2019–2025) is 44, so Jacksonville runs above the national May norm; 1.4% of its May days topped AQI 100 versus 1.3% nationally (about the same).
May is part of Jacksonville's spring season (March, April, May); the spring page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Jacksonville
The latest EPA AirNow observation puts Jacksonville's AQI at 34 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current Jacksonville air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Jacksonville, FL), 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.