Rockford Air Quality in February
Across 2019–2025, Rockford's February air quality had a median AQI of 45 (Good) over 188 monitored days in the Rockford, IL area. 0.0% of February days (0 of 188) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 100.0% of days. The cleanest February on record here was 2025 (median AQI 33, 0 days above 100) and the worst was 2019 (median 55, 0 days above 100, peak AQI 83).
- Good: 55.9%
- Moderate: 44.1%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
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How is the air in Rockford in February?
Good on a typical day: median AQI 45 across 2019–2025, with 0.0% of February days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓55.9% of February days were Good (AQI 0–50), 44.1% Moderate (51–100).
- ✓0 days of 188 reached AQI 101+; the February peak was 95.
- ✓Best February: 2025; worst February: 2019.
Frequently asked questions
What is the air quality like in Rockford in February?▾
Across 2019–2025, the median daily AQI in Rockford in February was 45 (Good). 55.9% of days were Good, 44.1% Moderate, and 0.0% reached Unhealthy for Sensitive Groups or worse, based on 188 monitored days in EPA's Air Quality System.
Is February a good time for outdoor exercise in Rockford?▾
A typical February day in Rockford sits in the Good range (median AQI 45), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of February days reached AQI 101+ in 2019–2025.
Which pollutant causes Rockford's February air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 100.0% of February days in Rockford. The highest February AQI recorded in 2019–2025 was 95 (Moderate), in 2019.
Rockford February air quality, year by year
Rockford February air quality by year (Rockford, IL, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019worst | 25 | 55 | 0 | 83 | PM2.5 |
| 2020 | 29 | 42 | 0 | 69 | PM2.5 |
| 2021 | 24 | 53 | 0 | 95 | PM2.5 |
| 2022 | 28 | 44 | 0 | 72 | PM2.5 |
| 2023 | 28 | 39 | 0 | 72 | PM2.5 |
| 2024 | 29 | 52 | 0 | 69 | PM2.5 |
| 2025cleanest | 25 | 33 | 0 | 65 | PM2.5 |
What February air means in Rockford
A typical February day in Rockford sits in the Good range (median AQI 45), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of February days reached AQI 101+ in 2019–2025.
February's median AQI of 45 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 February AQI across every EPA metro area (87,428 metro-days, 2019–2025) is 41, so Rockford runs above the national February norm; 0.0% of its February days topped AQI 100 versus 0.4% nationally (about the same).
February is part of Rockford's winter season (December, January, February); the winter 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.