Knoxville Air Quality in July
Across 2019–2025, Knoxville's July air quality had a median AQI of 54 (Moderate) over 217 monitored days in the Knoxville, TN area. 2.3% of July days (5 of 217) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 72.8% of days. The cleanest July on record here was 2025 (median AQI 50, 0 days above 100) and the worst was 2021 (median 59, 3 days above 100, peak AQI 110).
- Good: 35.5%
- Moderate: 62.2%
- Unhealthy for Sensitive Groups: 2.3%
- Unhealthy or worse: 0.0%
Extra Protection for Knoxville Homes
Air quality in Knoxville is moderate (AQI 61), with fine particles (PM2.5) the main concern. A True-HEPA purifier gives sensitive groups — kids, seniors and anyone with asthma or allergies — cleaner air indoors on days like today.
Recommended: Coway AP-1512HH Mighty — True HEPA + carbon · CADR ~246 CFM · rooms up to 361 sq ft
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How is the air in Knoxville in July?
Moderate on a typical day: median AQI 54 across 2019–2025, with 2.3% of July days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓35.5% of July days were Good (AQI 0–50), 62.2% Moderate (51–100).
- ✓5 days of 217 reached AQI 101+; the July peak was 149.
- ✓Best July: 2025; worst July: 2021.
Frequently asked questions
What is the air quality like in Knoxville in July?▾
Across 2019–2025, the median daily AQI in Knoxville in July was 54 (Moderate). 35.5% of days were Good, 62.2% Moderate, and 2.3% 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 Knoxville?▾
A typical July day in Knoxville is Moderate (median AQI 54): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and about 1 day in 43 of July days (2.3%) reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
Which pollutant causes Knoxville's July air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 72.8% of July days in Knoxville. The highest July AQI recorded in 2019–2025 was 149 (Unhealthy for Sensitive Groups), in 2021.
Knoxville July air quality, year by year
Knoxville July air quality by year (Knoxville, TN, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 31 | 54 | 0 | 80 | PM2.5 |
| 2020 | 31 | 51 | 0 | 97 | PM2.5 |
| 2021worst | 31 | 59 | 3 | 110 | PM2.5 |
| 2022 | 31 | 52 | 0 | 77 | PM2.5 |
| 2023 | 31 | 57 | 2 | 149 | PM2.5 |
| 2024 | 31 | 55 | 0 | 100 | PM2.5 |
| 2025cleanest | 31 | 50 | 0 | 85 | PM2.5 |
What July air means in Knoxville
A typical July day in Knoxville is Moderate (median AQI 54): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and about 1 day in 43 of July days (2.3%) reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
July's median AQI of 54 is in line with Knoxville's whole-year median of 52, 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 Knoxville runs above the national July norm; 2.3% of its July days topped AQI 100 versus 3.6% nationally (below average).
July is part of Knoxville's summer season (June, July, August); the summer page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Knoxville
The latest EPA AirNow observation puts Knoxville's AQI at 61 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current Knoxville air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Knoxville, TN), 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.