Madison Air Quality in February
Across 2019–2025, Madison's February air quality had a median AQI of 46 (Good) over 198 monitored days in the Madison, WI 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 100.0% of days. The cleanest February on record here was 2024 (median AQI 38, 0 days above 100) and the worst was 2021 (median 55, 0 days above 100, peak AQI 90).
- Good: 58.6%
- Moderate: 41.4%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
Improve Indoor Air Quality
Even with good outdoor air in Madison, indoor PM2.5, dust and allergens build up. A True-HEPA purifier keeps a bedroom or office consistently clean.
Recommended: Levoit Core 400S — True HEPA · CADR ~141 CFM · rooms up to 219 sq ft
As an Amazon Associate, we earn from qualifying purchases.
How is the air in Madison in February?
Good on a typical day: median AQI 46 across 2019–2025, with 0.0% of February days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓58.6% of February days were Good (AQI 0–50), 41.4% Moderate (51–100).
- ✓0 days of 198 reached AQI 101+; the February peak was 90.
- ✓Best February: 2024; worst February: 2021.
Frequently asked questions
What is the air quality like in Madison in February?▾
Across 2019–2025, the median daily AQI in Madison in February was 46 (Good). 58.6% of days were Good, 41.4% 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 Madison?▾
A typical February day in Madison sits in the Good range (median AQI 46), 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 Madison's February air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 100.0% of February days in Madison. The highest February AQI recorded in 2019–2025 was 90 (Moderate), in 2021.
Madison February air quality, year by year
Madison February air quality by year (Madison, WI, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 28 | 52 | 0 | 88 | PM2.5 |
| 2020 | 29 | 49 | 0 | 60 | PM2.5 |
| 2021worst | 28 | 55 | 0 | 90 | PM2.5 |
| 2022 | 28 | 42 | 0 | 76 | PM2.5 |
| 2023 | 28 | 44 | 0 | 73 | PM2.5 |
| 2024cleanest | 29 | 38 | 0 | 64 | PM2.5 |
| 2025 | 28 | 40 | 0 | 71 | PM2.5 |
What February air means in Madison
A typical February day in Madison sits in the Good range (median AQI 46), 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 46 is in line with Madison's whole-year median of 45, 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 Madison runs above the national February norm; 0.0% of its February days topped AQI 100 versus 0.4% nationally (about the same).
February is part of Madison's winter season (December, January, February); the winter page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Madison
The latest EPA AirNow observation puts Madison's AQI at 49 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current Madison air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Madison, WI), 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.