West Palm Beach Air Quality in Fall
Across 2019–2025, West Palm Beach's fall (September–November) air quality had a median AQI of 44 (Good) over 636 monitored days in the Miami-Fort Lauderdale-West Palm Beach, FL area. 0.2% of fall days (1 of 636) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 73.1% of days. The cleanest fall on record here was 2025 (median AQI 40, 0 days above 100) and the worst was 2023 (median 45, 1 day above 100, peak AQI 122).
- Good: 66.8%
- Moderate: 33.0%
- Unhealthy for Sensitive Groups: 0.2%
- Unhealthy or worse: 0.0%
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How is the air in West Palm Beach in fall?
Good on a typical day: median AQI 44 across 2019–2025, with 0.2% of fall days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓66.8% of fall days were Good (AQI 0–50), 33.0% Moderate (51–100).
- ✓1 day of 636 reached AQI 101+; the fall peak was 122.
- ✓Cleanest month: September; worst month: October.
Frequently asked questions
What is the air quality like in West Palm Beach in fall?▾
Across 2019–2025, the median daily AQI in West Palm Beach in fall was 44 (Good). 66.8% of days were Good, 33.0% Moderate, and 0.2% reached Unhealthy for Sensitive Groups or worse, based on 636 monitored days in EPA's Air Quality System.
Is fall a good time for outdoor exercise in West Palm Beach?▾
A typical fall day in West Palm Beach sits in the Good range (median AQI 44), 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 West Palm Beach's fall air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 73.1% of fall days in West Palm Beach. The highest fall AQI recorded in 2019–2025 was 122 (Unhealthy for Sensitive Groups), in 2023.
West Palm Beach fall air quality, year by year
West Palm Beach fall air quality by year (Miami-Fort Lauderdale-West Palm Beach, FL, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 90 | 49 | 0 | 79 | PM2.5 |
| 2020 | 91 | 47 | 0 | 87 | PM2.5 |
| 2021 | 91 | 43 | 0 | 94 | PM2.5 |
| 2022 | 91 | 49 | 0 | 97 | PM2.5 |
| 2023worst | 91 | 45 | 1 | 122 | PM2.5 |
| 2024 | 91 | 44 | 0 | 74 | PM2.5 |
| 2025cleanest | 91 | 40 | 0 | 74 | PM2.5 |
What fall air means in West Palm Beach
A typical fall day in West Palm Beach sits in the Good range (median AQI 44), 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 44 is below West Palm Beach's whole-year median of 51, making it one of the area's cleaner periods. Nationally, the median Fall AQI across every EPA metro area (296,275 metro-days, 2019–2025) is 40, so West Palm Beach runs above the national Fall norm; 0.2% of its Fall days topped AQI 100 versus 1.5% nationally (below average).
Within the season, September is the cleanest month (median AQI 43, 0.0% of days above 100) and October the worst (median 44, 0.5% above 100).
Activity-specific thresholds: running, cycling, kids' sports.
Right now in West Palm Beach
The latest EPA AirNow observation puts West Palm Beach's AQI at 28 (PM2.5). The figures above are multi-year season statistics, not today's reading.
View current West Palm Beach air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Miami-Fort Lauderdale-West Palm Beach, 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.