Hartford Air Quality in June
Across 2019–2025, Hartford's June air quality had a median AQI of 50 (Good) over 210 monitored days in the Hartford-West Hartford-East Hartford, CT area. 10.5% of June days (22 of 210) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 69.5% of days. The cleanest June on record here was 2019 (median AQI 45, 0 days above 100) and the worst was 2021 (median 49, 7 days above 100, peak AQI 151).
- Good: 52.9%
- Moderate: 36.7%
- Unhealthy for Sensitive Groups: 7.6%
- Unhealthy or worse: 2.9%
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How is the air in Hartford in June?
Good on a typical day: median AQI 50 across 2019–2025, with 10.5% of June days above AQI 100. Ground-level ozone is the main driver.
- ✓52.9% of June days were Good (AQI 0–50), 36.7% Moderate (51–100).
- ✓22 days of 210 reached AQI 101+; the June peak was 185.
- ✓Best June: 2019; worst June: 2021.
Frequently asked questions
What is the air quality like in Hartford in June?▾
Across 2019–2025, the median daily AQI in Hartford in June was 50 (Good). 52.9% of days were Good, 36.7% Moderate, and 10.5% 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 Hartford?▾
A typical June day in Hartford sits in the Good range (median AQI 50), so running, cycling and children's outdoor play are fine for everyone on most days; about 1 day in 10 of June days (10.5%) reached AQI 101+ in 2019–2025.
Which pollutant causes Hartford's June air quality problems?▾
Ground-level ozone set the daily AQI on 69.5% of June days in Hartford. The highest June AQI recorded in 2019–2025 was 185 (Unhealthy), in 2021.
Hartford June air quality, year by year
Hartford June air quality by year (Hartford-West Hartford-East Hartford, CT, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019cleanest | 30 | 45 | 0 | 100 | O3 |
| 2020 | 30 | 51 | 0 | 97 | O3 |
| 2021worst | 30 | 49 | 7 | 151 | O3 |
| 2022 | 30 | 45 | 1 | 112 | O3 |
| 2023 | 30 | 51 | 5 | 166 | O3 |
| 2024 | 30 | 51 | 6 | 185 | O3 |
| 2025 | 30 | 60 | 3 | 164 | O3 |
What June air means in Hartford
A typical June day in Hartford sits in the Good range (median AQI 50), so running, cycling and children's outdoor play are fine for everyone on most days; about 1 day in 10 of June days (10.5%) reached AQI 101+ in 2019–2025.
June's median AQI of 50 is above Hartford's whole-year median of 43, 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 Hartford runs above the national June norm; 10.5% of its June days topped AQI 100 versus 3.7% nationally (above average).
June is part of Hartford's summer season (June, July, August); the summer page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Hartford
The latest EPA AirNow observation puts Hartford's AQI at 36 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current Hartford air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Hartford-West Hartford-East Hartford, CT), 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.