Cheyenne Air Quality in June
Across 2019–2025, Cheyenne's June air quality had a median AQI of 48 (Good) over 210 monitored days in the Cheyenne, WY area. 0.0% of June days (0 of 210) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 94.3% of days. The cleanest June on record here was 2020 (median AQI 46, 0 days above 100) and the worst was 2023 (median 51, 0 days above 100, peak AQI 80).
- Good: 61.4%
- Moderate: 38.6%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
Reduce Indoor Ozone in Cheyenne
Today's main pollutant in Cheyenne 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 Cheyenne in June?
Good on a typical day: median AQI 48 across 2019–2025, with 0.0% of June days above AQI 100. Ground-level ozone is the main driver.
- ✓61.4% of June days were Good (AQI 0–50), 38.6% Moderate (51–100).
- ✓0 days of 210 reached AQI 101+; the June peak was 90.
- ✓Best June: 2020; worst June: 2023.
Frequently asked questions
What is the air quality like in Cheyenne in June?▾
Across 2019–2025, the median daily AQI in Cheyenne in June was 48 (Good). 61.4% of days were Good, 38.6% Moderate, and 0.0% 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 Cheyenne?▾
A typical June day in Cheyenne sits in the Good range (median AQI 48), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of June days reached AQI 101+ in 2019–2025.
Which pollutant causes Cheyenne's June air quality problems?▾
Ground-level ozone set the daily AQI on 94.3% of June days in Cheyenne. The highest June AQI recorded in 2019–2025 was 90 (Moderate), in 2023.
Cheyenne June air quality, year by year
Cheyenne June air quality by year (Cheyenne, WY, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 30 | 48 | 0 | 74 | O3 |
| 2020cleanest | 30 | 46 | 0 | 77 | O3 |
| 2021 | 30 | 49 | 0 | 74 | O3 |
| 2022 | 30 | 49 | 0 | 74 | O3 |
| 2023worst | 30 | 51 | 0 | 80 | O3 |
| 2024 | 30 | 49 | 0 | 80 | O3 |
| 2025 | 30 | 50 | 0 | 90 | O3 |
What June air means in Cheyenne
A typical June day in Cheyenne sits in the Good range (median AQI 48), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of June days reached AQI 101+ in 2019–2025.
June's median AQI of 48 is above Cheyenne's whole-year median of 44, 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 Cheyenne runs in line with the national June norm; 0.0% of its June days topped AQI 100 versus 3.7% nationally (below average).
June is part of Cheyenne's summer season (June, July, August); the summer page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Cheyenne
The latest EPA AirNow observation puts Cheyenne's AQI at 31 (O3). The figures above are multi-year month statistics, not today's reading.
View current Cheyenne air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Cheyenne, WY), 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.