Springfield, IL Air Quality in February
Across 2019–2025, Springfield's February air quality had a median AQI of 42 (Good) over 194 monitored days in the Springfield, IL area. 0.0% of February days (0 of 194) 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 2025 (median AQI 35, 0 days above 100) and the worst was 2019 (median 50, 0 days above 100, peak AQI 66).
- Good: 67.0%
- Moderate: 33.0%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
Reduce Indoor Ozone in Springfield
Today's main pollutant in Springfield is ground-level ozone (AQI 32). 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
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How is the air in Springfield 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.
- ✓67.0% of February days were Good (AQI 0–50), 33.0% Moderate (51–100).
- ✓0 days of 194 reached AQI 101+; the February peak was 68.
- ✓Best February: 2025; worst February: 2019.
Frequently asked questions
What is the air quality like in Springfield in February?▾
Across 2019–2025, the median daily AQI in Springfield in February was 42 (Good). 67.0% of days were Good, 33.0% Moderate, and 0.0% reached Unhealthy for Sensitive Groups or worse, based on 194 monitored days in EPA's Air Quality System.
Is February a good time for outdoor exercise in Springfield?▾
A typical February day in Springfield 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 Springfield's February air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 100.0% of February days in Springfield. The highest February AQI recorded in 2019–2025 was 68 (Moderate), in 2019.
Springfield February air quality, year by year
Springfield February air quality by year (Springfield, IL, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019worst | 28 | 50 | 0 | 66 | PM2.5 |
| 2020 | 29 | 42 | 0 | 60 | PM2.5 |
| 2021 | 27 | 47 | 0 | 67 | PM2.5 |
| 2022 | 25 | 42 | 0 | 63 | PM2.5 |
| 2023 | 28 | 38 | 0 | 64 | PM2.5 |
| 2024 | 29 | 40 | 0 | 68 | PM2.5 |
| 2025cleanest | 28 | 35 | 0 | 62 | PM2.5 |
What February air means in Springfield
A typical February day in Springfield 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 Springfield'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 Springfield 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 Springfield's winter season (December, January, February); the winter page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Springfield
The latest EPA AirNow observation puts Springfield's AQI at 32 (O3). The figures above are multi-year month statistics, not today's reading.
View current Springfield air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Springfield, IL), 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.