St. Petersburg Air Quality in October
Across 2019–2025, St. Petersburg's October air quality had a median AQI of 47 (Good) over 213 monitored days in the Tampa-St. Petersburg-Clearwater, FL area. 0.9% of October days (2 of 213) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 61.0% of days. The cleanest October on record here was 2025 (median AQI 43, 0 days above 100) and the worst was 2024 (median 48, 1 day above 100, peak AQI 105).
- Good: 60.1%
- Moderate: 39.0%
- Unhealthy for Sensitive Groups: 0.9%
- Unhealthy or worse: 0.0%
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How is the air in St. Petersburg in October?
Good on a typical day: median AQI 47 across 2019–2025, with 0.9% of October days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓60.1% of October days were Good (AQI 0–50), 39.0% Moderate (51–100).
- ✓2 days of 213 reached AQI 101+; the October peak was 114.
- ✓Best October: 2025; worst October: 2024.
Frequently asked questions
What is the air quality like in St. Petersburg in October?▾
Across 2019–2025, the median daily AQI in St. Petersburg in October was 47 (Good). 60.1% of days were Good, 39.0% Moderate, and 0.9% reached Unhealthy for Sensitive Groups or worse, based on 213 monitored days in EPA's Air Quality System.
Is October a good time for outdoor exercise in St. Petersburg?▾
A typical October day in St. Petersburg sits in the Good range (median AQI 47), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of October days reached AQI 101+ in 2019–2025.
Which pollutant causes St. Petersburg's October air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 61.0% of October days in St. Petersburg. The highest October AQI recorded in 2019–2025 was 114 (Unhealthy for Sensitive Groups), in 2024.
St. Petersburg October air quality, year by year
St. Petersburg October air quality by year (Tampa-St. Petersburg-Clearwater, FL, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 31 | 47 | 0 | 61 | PM2.5 |
| 2020 | 31 | 47 | 0 | 64 | PM2.5 |
| 2021 | 31 | 47 | 0 | 74 | PM2.5 |
| 2022 | 31 | 51 | 0 | 90 | PM2.5 |
| 2023 | 31 | 51 | 1 | 114 | PM2.5 |
| 2024worst | 27 | 48 | 1 | 105 | O3 |
| 2025cleanest | 31 | 43 | 0 | 67 | O3 |
What October air means in St. Petersburg
A typical October day in St. Petersburg sits in the Good range (median AQI 47), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of October days reached AQI 101+ in 2019–2025.
October's median AQI of 47 is below St. Petersburg's whole-year median of 51, making it one of the area's cleaner periods. Nationally, the median October AQI across every EPA metro area (102,872 metro-days, 2019–2025) is 38, so St. Petersburg runs above the national October norm; 0.9% of its October days topped AQI 100 versus 1.3% nationally (about the same).
October is part of St. Petersburg's fall season (September, October, November); the fall page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in St. Petersburg
The latest EPA AirNow observation puts St. Petersburg's AQI at 38 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current St. Petersburg air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Tampa-St. Petersburg-Clearwater, 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.