Boise Air Quality in June
Across 2019–2025, Boise's June air quality had a median AQI of 47 (Good) over 210 monitored days in the Boise City, ID area. 0.5% of June days (1 of 210) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 81.0% of days. The cleanest June on record here was 2020 (median AQI 42, 0 days above 100) and the worst was 2024 (median 51, 1 day above 100, peak AQI 129).
- Good: 69.5%
- Moderate: 30.0%
- Unhealthy for Sensitive Groups: 0.5%
- Unhealthy or worse: 0.0%
Reduce Indoor Ozone in Boise
Today's main pollutant in Boise is ground-level ozone (AQI 38). 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
As an Amazon Associate, we earn from qualifying purchases.
How is the air in Boise in June?
Good on a typical day: median AQI 47 across 2019–2025, with 0.5% of June days above AQI 100. Ground-level ozone is the main driver.
- ✓69.5% of June days were Good (AQI 0–50), 30.0% Moderate (51–100).
- ✓1 day of 210 reached AQI 101+; the June peak was 129.
- ✓Best June: 2020; worst June: 2024.
Frequently asked questions
What is the air quality like in Boise in June?▾
Across 2019–2025, the median daily AQI in Boise in June was 47 (Good). 69.5% of days were Good, 30.0% Moderate, and 0.5% 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 Boise?▾
A typical June day in Boise sits in the Good range (median AQI 47), 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 Boise's June air quality problems?▾
Ground-level ozone set the daily AQI on 81.0% of June days in Boise. The highest June AQI recorded in 2019–2025 was 129 (Unhealthy for Sensitive Groups), in 2024.
Boise June air quality, year by year
Boise June air quality by year (Boise City, ID, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 30 | 44 | 0 | 77 | O3 |
| 2020cleanest | 30 | 42 | 0 | 67 | O3 |
| 2021 | 30 | 49 | 0 | 80 | O3 |
| 2022 | 30 | 46 | 0 | 74 | O3 |
| 2023 | 30 | 49 | 0 | 74 | O3 |
| 2024worst | 30 | 51 | 1 | 129 | O3 |
| 2025 | 30 | 48 | 0 | 80 | O3 |
What June air means in Boise
A typical June day in Boise sits in the Good range (median AQI 47), 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 47 is below Boise's whole-year median of 54, making it one of the area's cleaner periods. Nationally, the median June AQI across every EPA metro area (100,635 metro-days, 2019–2025) is 46, so Boise runs in line with the national June norm; 0.5% of its June days topped AQI 100 versus 3.7% nationally (below average).
June is part of Boise's summer season (June, July, August); the summer page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Boise
The latest EPA AirNow observation puts Boise's AQI at 38 (O3). The figures above are multi-year month statistics, not today's reading.
View current Boise air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Boise City, ID), 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.