Houston Air Quality in June
Across 2019–2025, Houston's June air quality had a median AQI of 67 (Moderate) over 210 monitored days in the Houston-The Woodlands-Sugar Land, TX area. 20.9% of June days (44 of 210) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 55.7% of days. The cleanest June on record here was 2025 (median AQI 61, 2 days above 100) and the worst was 2019 (median 71, 9 days above 100, peak AQI 166).
- Good: 9.0%
- Moderate: 70.0%
- Unhealthy for Sensitive Groups: 15.7%
- Unhealthy or worse: 5.2%
Extra Protection for Houston Homes
Air quality in Houston is moderate (AQI 57), 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 Houston in June?
Moderate on a typical day: median AQI 67 across 2019–2025, with 20.9% of June days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓9.0% of June days were Good (AQI 0–50), 70.0% Moderate (51–100).
- ✓44 days of 210 reached AQI 101+; the June peak was 201.
- ✓Best June: 2025; worst June: 2019.
Frequently asked questions
What is the air quality like in Houston in June?▾
Across 2019–2025, the median daily AQI in Houston in June was 67 (Moderate). 9.0% of days were Good, 70.0% Moderate, and 20.9% 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 Houston?▾
A typical June day in Houston is Moderate (median AQI 67): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and about 1 day in 5 of June days (20.9%) reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
Which pollutant causes Houston's June air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 55.7% of June days in Houston. The highest June AQI recorded in 2019–2025 was 201 (Very Unhealthy), in 2019.
Houston June air quality, year by year
Houston June air quality by year (Houston-The Woodlands-Sugar Land, TX, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019worst | 30 | 71 | 9 | 166 | O3 |
| 2020 | 30 | 73 | 4 | 147 | PM2.5 |
| 2021 | 30 | 57 | 6 | 159 | PM2.5 |
| 2022 | 30 | 90 | 8 | 179 | O3 |
| 2023 | 30 | 74 | 8 | 197 | O3 |
| 2024 | 30 | 69 | 7 | 201 | O3 |
| 2025cleanest | 30 | 61 | 2 | 126 | PM2.5 |
What June air means in Houston
A typical June day in Houston is Moderate (median AQI 67): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and about 1 day in 5 of June days (20.9%) 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 67 is above Houston's whole-year median of 61, 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 Houston runs above the national June norm; 20.9% of its June days topped AQI 100 versus 3.7% nationally (above average).
June is part of Houston's summer season (June, July, August); the summer page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Houston
The latest EPA AirNow observation puts Houston's AQI at 57 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current Houston air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Houston-The Woodlands-Sugar Land, TX), 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.