Peoria Air Quality in July
Across 2019–2025, Peoria's July air quality had a median AQI of 48 (Good) over 217 monitored days in the Peoria, IL area. 1.9% of July days (4 of 217) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 50.7% of days. The cleanest July on record here was 2022 (median AQI 48, 0 days above 100) and the worst was 2019 (median 52, 1 day above 100, peak AQI 101).
- Good: 55.3%
- Moderate: 42.9%
- Unhealthy for Sensitive Groups: 1.4%
- Unhealthy or worse: 0.5%
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How is the air in Peoria in July?
Good on a typical day: median AQI 48 across 2019–2025, with 1.9% of July days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓55.3% of July days were Good (AQI 0–50), 42.9% Moderate (51–100).
- ✓4 days of 217 reached AQI 101+; the July peak was 154.
- ✓Best July: 2022; worst July: 2019.
Frequently asked questions
What is the air quality like in Peoria in July?▾
Across 2019–2025, the median daily AQI in Peoria in July was 48 (Good). 55.3% of days were Good, 42.9% Moderate, and 1.9% reached Unhealthy for Sensitive Groups or worse, based on 217 monitored days in EPA's Air Quality System.
Is July a good time for outdoor exercise in Peoria?▾
A typical July day in Peoria sits in the Good range (median AQI 48), so running, cycling and children's outdoor play are fine for everyone on most days; about 1 day in 53 of July days (1.9%) reached AQI 101+ in 2019–2025.
Which pollutant causes Peoria's July air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 50.7% of July days in Peoria. The highest July AQI recorded in 2019–2025 was 154 (Unhealthy), in 2019.
Peoria July air quality, year by year
Peoria July air quality by year (Peoria, IL, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019worst | 31 | 52 | 1 | 101 | PM2.5 |
| 2020 | 31 | 43 | 1 | 115 | O3 |
| 2021 | 31 | 55 | 0 | 97 | PM2.5 |
| 2022cleanest | 31 | 48 | 0 | 86 | PM2.5 |
| 2023 | 31 | 48 | 1 | 109 | O3 |
| 2024 | 31 | 50 | 0 | 72 | PM2.5 |
| 2025 | 31 | 49 | 1 | 154 | PM2.5 |
What July air means in Peoria
A typical July day in Peoria sits in the Good range (median AQI 48), so running, cycling and children's outdoor play are fine for everyone on most days; about 1 day in 53 of July days (1.9%) reached AQI 101+ in 2019–2025.
July's median AQI of 48 is in line with Peoria's whole-year median of 45, so this period is neither a clean nor a dirty stretch for the area. Nationally, the median July AQI across every EPA metro area (103,858 metro-days, 2019–2025) is 47, so Peoria runs in line with the national July norm; 1.9% of its July days topped AQI 100 versus 3.6% nationally (below average).
July is part of Peoria's summer season (June, July, August); the summer page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Peoria
The latest EPA AirNow observation puts Peoria's AQI at 42 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current Peoria air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Peoria, 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.