Harrisburg Air Quality in November
Across 2019–2025, Harrisburg's November air quality had a median AQI of 49 (Good) over 210 monitored days in the Harrisburg-Carlisle, PA area. 0.0% of November days (0 of 210) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 84.8% of days. The cleanest November on record here was 2024 (median AQI 39, 0 days above 100) and the worst was 2022 (median 52, 0 days above 100, peak AQI 86).
- Good: 53.3%
- Moderate: 46.7%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
Reduce Indoor Ozone in Harrisburg
Today's main pollutant in Harrisburg is ground-level ozone (AQI 48). Important: standard HEPA filters do NOT remove ozone — only a purifier with a substantial activated-carbon bed adsorbs it. The biggest wins are cutting indoor sources (gas appliances, certain "ionizer" purifiers) and ventilating when outdoor ozone is low (early morning). A high-carbon unit helps with the gases and VOCs that linger indoors.
Recommended: Levoit Core 300 — True HEPA + activated carbon · CADR ~141 CFM · rooms up to 219 sq ft
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How is the air in Harrisburg in November?
Good on a typical day: median AQI 49 across 2019–2025, with 0.0% of November days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓53.3% of November days were Good (AQI 0–50), 46.7% Moderate (51–100).
- ✓0 days of 210 reached AQI 101+; the November peak was 97.
- ✓Best November: 2024; worst November: 2022.
Frequently asked questions
What is the air quality like in Harrisburg in November?▾
Across 2019–2025, the median daily AQI in Harrisburg in November was 49 (Good). 53.3% of days were Good, 46.7% Moderate, and 0.0% reached Unhealthy for Sensitive Groups or worse, based on 210 monitored days in EPA's Air Quality System.
Is November a good time for outdoor exercise in Harrisburg?▾
A typical November day in Harrisburg sits in the Good range (median AQI 49), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of November days reached AQI 101+ in 2019–2025.
Which pollutant causes Harrisburg's November air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 84.8% of November days in Harrisburg. The highest November AQI recorded in 2019–2025 was 97 (Moderate), in 2022.
Harrisburg November air quality, year by year
Harrisburg November air quality by year (Harrisburg-Carlisle, PA, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 30 | 48 | 0 | 77 | PM2.5 |
| 2020 | 30 | 52 | 0 | 88 | PM2.5 |
| 2021 | 30 | 52 | 0 | 83 | PM2.5 |
| 2022worst | 30 | 52 | 0 | 86 | PM2.5 |
| 2023 | 30 | 48 | 0 | 94 | PM2.5 |
| 2024cleanest | 30 | 39 | 0 | 68 | PM2.5 |
| 2025 | 30 | 39 | 0 | 97 | PM2.5 |
What November air means in Harrisburg
A typical November day in Harrisburg sits in the Good range (median AQI 49), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of November days reached AQI 101+ in 2019–2025.
November's median AQI of 49 is in line with Harrisburg's whole-year median of 50, so this period is neither a clean nor a dirty stretch for the area. Nationally, the median November AQI across every EPA metro area (92,704 metro-days, 2019–2025) is 39, so Harrisburg runs above the national November norm; 0.0% of its November days topped AQI 100 versus 0.6% nationally (about the same).
November is part of Harrisburg's fall season (September, October, November); the fall page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Harrisburg
The latest EPA AirNow observation puts Harrisburg's AQI at 48 (O3). The figures above are multi-year month statistics, not today's reading.
View current Harrisburg air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Harrisburg-Carlisle, 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.