Las Vegas Air Quality in Summer
Across 2019–2025, Las Vegas's summer (June–August) air quality had a median AQI of 77 (Moderate) over 644 monitored days in the Las Vegas-Henderson-Paradise, NV area. 18.0% of summer days (116 of 644) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 92.2% of days. The cleanest summer on record here was 2019 (median AQI 74, 4 days above 100) and the worst was 2021 (median 84, 27 days above 100, peak AQI 183).
- Good: 8.9%
- Moderate: 73.1%
- Unhealthy for Sensitive Groups: 17.5%
- Unhealthy or worse: 0.5%
Reduce Indoor Ozone in Las Vegas
Today's main pollutant in Las Vegas is ground-level ozone (AQI 31). Important: standard HEPA filters do NOT remove ozone — only a purifier with a substantial activated-carbon bed adsorbs it. The biggest wins are cutting indoor sources (gas appliances, certain "ionizer" purifiers) and ventilating when outdoor ozone is low (early morning). A high-carbon unit helps with the gases and VOCs that linger indoors.
Recommended: Levoit Core 300 — True HEPA + activated carbon · CADR ~141 CFM · rooms up to 219 sq ft
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How is the air in Las Vegas in summer?
Moderate on a typical day: median AQI 77 across 2019–2025, with 18.0% of summer days above AQI 100. Ground-level ozone is the main driver.
- ✓8.9% of summer days were Good (AQI 0–50), 73.1% Moderate (51–100).
- ✓116 days of 644 reached AQI 101+; the summer peak was 183.
- ✓Cleanest month: June; worst month: July.
Frequently asked questions
What is the air quality like in Las Vegas in summer?▾
Across 2019–2025, the median daily AQI in Las Vegas in summer was 77 (Moderate). 8.9% of days were Good, 73.1% Moderate, and 18.0% reached Unhealthy for Sensitive Groups or worse, based on 644 monitored days in EPA's Air Quality System.
Is summer a good time for outdoor exercise in Las Vegas?▾
A typical summer day in Las Vegas is Moderate (median AQI 77): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and about 1 day in 6 of summer days (18.0%) reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
Which pollutant causes Las Vegas's summer air quality problems?▾
Ground-level ozone set the daily AQI on 92.2% of summer days in Las Vegas. The highest summer AQI recorded in 2019–2025 was 183 (Unhealthy), in 2021.
Las Vegas summer air quality, year by year
Las Vegas summer air quality by year (Las Vegas-Henderson-Paradise, NV, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019cleanest | 92 | 74 | 4 | 122 | O3 |
| 2020 | 92 | 71 | 11 | 140 | O3 |
| 2021worst | 92 | 84 | 27 | 183 | O3 |
| 2022 | 92 | 77 | 12 | 147 | O3 |
| 2023 | 92 | 84 | 17 | 129 | O3 |
| 2024 | 92 | 84 | 24 | 140 | O3 |
| 2025 | 92 | 80 | 21 | 138 | O3 |
What summer air means in Las Vegas
A typical summer day in Las Vegas is Moderate (median AQI 77): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and about 1 day in 6 of summer days (18.0%) reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
Summer's median AQI of 77 is above Las Vegas's whole-year median of 62, making it one of the area's dirtier periods. Nationally, the median Summer AQI across every EPA metro area (308,645 metro-days, 2019–2025) is 46, so Las Vegas runs above the national Summer norm; 18.0% of its Summer days topped AQI 100 versus 3.6% nationally (above average).
Within the season, June is the cleanest month (median AQI 84, 15.7% of days above 100) and July the worst (median 77, 22.1% above 100).
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Las Vegas
The latest EPA AirNow observation puts Las Vegas's AQI at 31 (O3). The figures above are multi-year season statistics, not today's reading.
View current Las Vegas air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Las Vegas-Henderson-Paradise, NV), 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.