New Haven Air Quality in February
Across 2019–2025, New Haven's February air quality had a median AQI of 44 (Good) over 198 monitored days in the New Haven-Milford, CT area. 0.5% of February days (1 of 198) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 67.2% of days. The cleanest February on record here was 2025 (median AQI 37, 0 days above 100) and the worst was 2019 (median 44, 1 day above 100, peak AQI 105).
- Good: 58.1%
- Moderate: 41.4%
- Unhealthy for Sensitive Groups: 0.5%
- Unhealthy or worse: 0.0%
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How is the air in New Haven in February?
Good on a typical day: median AQI 44 across 2019–2025, with 0.5% of February days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓58.1% of February days were Good (AQI 0–50), 41.4% Moderate (51–100).
- ✓1 day of 198 reached AQI 101+; the February peak was 105.
- ✓Best February: 2025; worst February: 2019.
Frequently asked questions
What is the air quality like in New Haven in February?▾
Across 2019–2025, the median daily AQI in New Haven in February was 44 (Good). 58.1% of days were Good, 41.4% Moderate, and 0.5% reached Unhealthy for Sensitive Groups or worse, based on 198 monitored days in EPA's Air Quality System.
Is February a good time for outdoor exercise in New Haven?▾
A typical February day in New Haven sits in the Good range (median AQI 44), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of February days reached AQI 101+ in 2019–2025.
Which pollutant causes New Haven's February air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 67.2% of February days in New Haven. The highest February AQI recorded in 2019–2025 was 105 (Unhealthy for Sensitive Groups), in 2019.
New Haven February air quality, year by year
New Haven February air quality by year (New Haven-Milford, CT, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019worst | 28 | 44 | 1 | 105 | PM2.5 |
| 2020 | 29 | 51 | 0 | 71 | PM2.5 |
| 2021 | 28 | 48 | 0 | 72 | PM2.5 |
| 2022 | 28 | 46 | 0 | 69 | PM2.5 |
| 2023 | 28 | 51 | 0 | 76 | PM2.5 |
| 2024 | 29 | 41 | 0 | 64 | PM2.5 |
| 2025cleanest | 28 | 37 | 0 | 71 | O3 |
What February air means in New Haven
A typical February day in New Haven sits in the Good range (median AQI 44), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of February days reached AQI 101+ in 2019–2025.
February's median AQI of 44 is in line with New Haven's whole-year median of 44, so this period is neither a clean nor a dirty stretch for the area. Nationally, the median February AQI across every EPA metro area (87,428 metro-days, 2019–2025) is 41, so New Haven runs in line with the national February norm; 0.5% of its February days topped AQI 100 versus 0.4% nationally (about the same).
February is part of New Haven's winter season (December, January, February); the winter page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in New Haven
The latest EPA AirNow observation puts New Haven's AQI at 32 (O3). The figures above are multi-year month statistics, not today's reading.
View current New Haven air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (New Haven-Milford, 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.