Rockford Air Quality in November
Across 2019–2025, Rockford's November air quality had a median AQI of 44 (Good) over 195 monitored days in the Rockford, IL area. 0.0% of November days (0 of 195) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 100.0% of days. The cleanest November on record here was 2024 (median AQI 34, 0 days above 100) and the worst was 2019 (median 58, 0 days above 100, peak AQI 81).
- Good: 57.4%
- Moderate: 42.6%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
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How is the air in Rockford in November?
Good on a typical day: median AQI 44 across 2019–2025, with 0.0% of November days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓57.4% of November days were Good (AQI 0–50), 42.6% Moderate (51–100).
- ✓0 days of 195 reached AQI 101+; the November peak was 85.
- ✓Best November: 2024; worst November: 2019.
Frequently asked questions
What is the air quality like in Rockford in November?▾
Across 2019–2025, the median daily AQI in Rockford in November was 44 (Good). 57.4% of days were Good, 42.6% Moderate, and 0.0% reached Unhealthy for Sensitive Groups or worse, based on 195 monitored days in EPA's Air Quality System.
Is November a good time for outdoor exercise in Rockford?▾
A typical November day in Rockford 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 November days reached AQI 101+ in 2019–2025.
Which pollutant causes Rockford's November air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 100.0% of November days in Rockford. The highest November AQI recorded in 2019–2025 was 85 (Moderate), in 2019.
Rockford November air quality, year by year
Rockford November air quality by year (Rockford, IL, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019worst | 17 | 58 | 0 | 81 | PM2.5 |
| 2020 | 30 | 51 | 0 | 71 | PM2.5 |
| 2021 | 30 | 46 | 0 | 85 | PM2.5 |
| 2022 | 28 | 51 | 0 | 82 | PM2.5 |
| 2023 | 30 | 49 | 0 | 83 | PM2.5 |
| 2024cleanest | 30 | 34 | 0 | 60 | PM2.5 |
| 2025 | 30 | 38 | 0 | 68 | PM2.5 |
What November air means in Rockford
A typical November day in Rockford 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 November days reached AQI 101+ in 2019–2025.
November's median AQI of 44 is in line with Rockford's whole-year median of 47, 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 Rockford 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 Rockford's fall season (September, October, November); the fall page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Rockford
The latest EPA AirNow observation puts Rockford's AQI at 22 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current Rockford air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Rockford, IL), 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.