Erie Air Quality in August
Across 2019–2025, Erie's August air quality had a median AQI of 40 (Good) over 217 monitored days in the Erie, PA area. 0.5% of August days (1 of 217) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 59.4% of days. The cleanest August on record here was 2021 (median AQI 36, 0 days above 100) and the worst was 2025 (median 40, 1 day above 100, peak AQI 149).
- Good: 74.2%
- Moderate: 25.3%
- Unhealthy for Sensitive Groups: 0.5%
- Unhealthy or worse: 0.0%
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How is the air in Erie in August?
Good on a typical day: median AQI 40 across 2019–2025, with 0.5% of August days above AQI 100. Ground-level ozone is the main driver.
- ✓74.2% of August days were Good (AQI 0–50), 25.3% Moderate (51–100).
- ✓1 day of 217 reached AQI 101+; the August peak was 149.
- ✓Best August: 2021; worst August: 2025.
Frequently asked questions
What is the air quality like in Erie in August?▾
Across 2019–2025, the median daily AQI in Erie in August was 40 (Good). 74.2% of days were Good, 25.3% Moderate, and 0.5% reached Unhealthy for Sensitive Groups or worse, based on 217 monitored days in EPA's Air Quality System.
Is August a good time for outdoor exercise in Erie?▾
A typical August day in Erie sits in the Good range (median AQI 40), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of August days reached AQI 101+ in 2019–2025.
Which pollutant causes Erie's August air quality problems?▾
Ground-level ozone set the daily AQI on 59.4% of August days in Erie. The highest August AQI recorded in 2019–2025 was 149 (Unhealthy for Sensitive Groups), in 2025.
Erie August air quality, year by year
Erie August air quality by year (Erie, PA, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 31 | 42 | 0 | 77 | O3 |
| 2020 | 31 | 40 | 0 | 74 | O3 |
| 2021cleanest | 31 | 36 | 0 | 74 | O3 |
| 2022 | 31 | 40 | 0 | 55 | O3 |
| 2023 | 31 | 43 | 0 | 85 | O3 |
| 2024 | 31 | 42 | 0 | 90 | O3 |
| 2025worst | 31 | 40 | 1 | 149 | PM2.5 |
What August air means in Erie
A typical August day in Erie sits in the Good range (median AQI 40), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of August days reached AQI 101+ in 2019–2025.
August's median AQI of 40 is in line with Erie's whole-year median of 38, so this period is neither a clean nor a dirty stretch for the area. Nationally, the median August AQI across every EPA metro area (104,152 metro-days, 2019–2025) is 45, so Erie runs below the national August norm; 0.5% of its August days topped AQI 100 versus 3.5% nationally (below average).
August is part of Erie's summer season (June, July, August); the summer page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Erie
The latest EPA AirNow observation puts Erie's AQI at 40 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current Erie air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Erie, PA), 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.