Rockford Air Quality in June
Across 2019–2025, Rockford's June air quality had a median AQI of 53 (Moderate) over 210 monitored days in the Rockford, IL area. 7.6% of June days (16 of 210) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 63.8% of days. The cleanest June on record here was 2024 (median AQI 45, 0 days above 100) and the worst was 2023 (median 99, 14 days above 100, peak AQI 242).
- Good: 43.3%
- Moderate: 49.0%
- Unhealthy for Sensitive Groups: 6.2%
- Unhealthy or worse: 1.4%
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How is the air in Rockford in June?
Moderate on a typical day: median AQI 53 across 2019–2025, with 7.6% of June days above AQI 100. Ground-level ozone is the main driver.
- ✓43.3% of June days were Good (AQI 0–50), 49.0% Moderate (51–100).
- ✓16 days of 210 reached AQI 101+; the June peak was 242.
- ✓Best June: 2024; worst June: 2023.
Frequently asked questions
What is the air quality like in Rockford in June?▾
Across 2019–2025, the median daily AQI in Rockford in June was 53 (Moderate). 43.3% of days were Good, 49.0% Moderate, and 7.6% reached Unhealthy for Sensitive Groups or worse, based on 210 monitored days in EPA's Air Quality System.
Is June a good time for outdoor exercise in Rockford?▾
A typical June day in Rockford is Moderate (median AQI 53): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and about 1 day in 13 of June days (7.6%) reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
Which pollutant causes Rockford's June air quality problems?▾
Ground-level ozone set the daily AQI on 63.8% of June days in Rockford. The highest June AQI recorded in 2019–2025 was 242 (Very Unhealthy), in 2023.
Rockford June air quality, year by year
Rockford June air quality by year (Rockford, IL, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 30 | 52 | 0 | 87 | PM2.5 |
| 2020 | 30 | 51 | 1 | 101 | O3 |
| 2021 | 30 | 51 | 0 | 100 | O3 |
| 2022 | 30 | 51 | 0 | 97 | O3 |
| 2023worst | 30 | 99 | 14 | 242 | PM2.5 |
| 2024cleanest | 30 | 45 | 0 | 84 | O3 |
| 2025 | 30 | 57 | 1 | 108 | O3 |
What June air means in Rockford
A typical June day in Rockford is Moderate (median AQI 53): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and about 1 day in 13 of June days (7.6%) reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
June's median AQI of 53 is above Rockford's whole-year median of 47, making it one of the area's dirtier periods. Nationally, the median June AQI across every EPA metro area (100,635 metro-days, 2019–2025) is 46, so Rockford runs above the national June norm; 7.6% of its June days topped AQI 100 versus 3.7% nationally (above average).
June is part of Rockford's summer season (June, July, August); the summer 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.