Durham Air Quality in February
Across 2019–2025, Durham's February air quality had a median AQI of 42 (Good) over 198 monitored days in the Durham-Chapel Hill, NC area. 0.0% of February days (0 of 198) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 99.5% of days. The cleanest February on record here was 2020 (median AQI 29, 0 days above 100) and the worst was 2024 (median 57, 0 days above 100, peak AQI 80).
- Good: 63.6%
- Moderate: 36.4%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
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How is the air in Durham in February?
Good on a typical day: median AQI 42 across 2019–2025, with 0.0% of February days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓63.6% of February days were Good (AQI 0–50), 36.4% Moderate (51–100).
- ✓0 days of 198 reached AQI 101+; the February peak was 92.
- ✓Best February: 2020; worst February: 2024.
Frequently asked questions
What is the air quality like in Durham in February?▾
Across 2019–2025, the median daily AQI in Durham in February was 42 (Good). 63.6% of days were Good, 36.4% Moderate, and 0.0% 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 Durham?▾
A typical February day in Durham sits in the Good range (median AQI 42), 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 Durham's February air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 99.5% of February days in Durham. The highest February AQI recorded in 2019–2025 was 92 (Moderate), in 2024.
Durham February air quality, year by year
Durham February air quality by year (Durham-Chapel Hill, NC, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 28 | 54 | 0 | 73 | PM2.5 |
| 2020cleanest | 29 | 29 | 0 | 92 | PM2.5 |
| 2021 | 28 | 37 | 0 | 62 | PM2.5 |
| 2022 | 28 | 39 | 0 | 66 | PM2.5 |
| 2023 | 28 | 33 | 0 | 58 | PM2.5 |
| 2024worst | 29 | 57 | 0 | 80 | PM2.5 |
| 2025 | 28 | 37 | 0 | 65 | PM2.5 |
What February air means in Durham
A typical February day in Durham sits in the Good range (median AQI 42), 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 42 is in line with Durham'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 Durham runs in line with the national February norm; 0.0% of its February days topped AQI 100 versus 0.4% nationally (about the same).
February is part of Durham's winter season (December, January, February); the winter page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Durham
The latest EPA AirNow observation puts Durham's AQI at 41 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current Durham air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Durham-Chapel Hill, NC), 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.