Erie Air Quality in March
Across 2019–2025, Erie's March air quality had a median AQI of 38 (Good) over 212 monitored days in the Erie, PA area. 0.0% of March days (0 of 212) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 54.2% of days. The cleanest March on record here was 2025 (median AQI 27, 0 days above 100) and the worst was 2019 (median 49, 0 days above 100, peak AQI 78).
- Good: 75.5%
- Moderate: 24.5%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
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How is the air in Erie in March?
Good on a typical day: median AQI 38 across 2019–2025, with 0.0% of March days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓75.5% of March days were Good (AQI 0–50), 24.5% Moderate (51–100).
- ✓0 days of 212 reached AQI 101+; the March peak was 78.
- ✓Best March: 2025; worst March: 2019.
Frequently asked questions
What is the air quality like in Erie in March?▾
Across 2019–2025, the median daily AQI in Erie in March was 38 (Good). 75.5% of days were Good, 24.5% Moderate, and 0.0% reached Unhealthy for Sensitive Groups or worse, based on 212 monitored days in EPA's Air Quality System.
Is March a good time for outdoor exercise in Erie?▾
A typical March day in Erie sits in the Good range (median AQI 38), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of March days reached AQI 101+ in 2019–2025.
Which pollutant causes Erie's March air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 54.2% of March days in Erie. The highest March AQI recorded in 2019–2025 was 78 (Moderate), in 2019.
Erie March air quality, year by year
Erie March air quality by year (Erie, PA, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019worst | 31 | 49 | 0 | 78 | PM2.5 |
| 2020 | 31 | 36 | 0 | 58 | PM2.5 |
| 2021 | 26 | 35 | 0 | 65 | O3 |
| 2022 | 31 | 43 | 0 | 66 | PM2.5 |
| 2023 | 31 | 41 | 0 | 64 | PM2.5 |
| 2024 | 31 | 38 | 0 | 65 | O3 |
| 2025cleanest | 31 | 27 | 0 | 60 | PM2.5 |
What March air means in Erie
A typical March day in Erie sits in the Good range (median AQI 38), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of March days reached AQI 101+ in 2019–2025.
March's median AQI of 38 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 March AQI across every EPA metro area (102,455 metro-days, 2019–2025) is 42, so Erie runs below the national March norm; 0.0% of its March days topped AQI 100 versus 0.4% nationally (about the same).
March is part of Erie's spring season (March, April, May); the spring 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.