Lansing Air Quality in Winter
Across 2019–2025, Lansing's winter (December–February) air quality had a median AQI of 38 (Good) over 632 monitored days in the Lansing-East Lansing, MI area. 0.0% of winter days (0 of 632) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 64.7% of days. The cleanest winter on record here was 2025 (median AQI 32, 0 days above 100) and the worst was 2021 (median 52, 0 days above 100, peak AQI 88).
- Good: 69.1%
- Moderate: 30.9%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
Improve Indoor Air Quality
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How is the air in Lansing in winter?
Good on a typical day: median AQI 38 across 2019–2025, with 0.0% of winter days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓69.1% of winter days were Good (AQI 0–50), 30.9% Moderate (51–100).
- ✓0 days of 632 reached AQI 101+; the winter peak was 92.
- ✓Cleanest month: December; worst month: January.
Frequently asked questions
What is the air quality like in Lansing in winter?▾
Across 2019–2025, the median daily AQI in Lansing in winter was 38 (Good). 69.1% of days were Good, 30.9% Moderate, and 0.0% reached Unhealthy for Sensitive Groups or worse, based on 632 monitored days in EPA's Air Quality System.
Is winter a good time for outdoor exercise in Lansing?▾
A typical winter day in Lansing sits in the Good range (median AQI 38), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of winter days reached AQI 101+ in 2019–2025.
Which pollutant causes Lansing's winter air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 64.7% of winter days in Lansing. The highest winter AQI recorded in 2019–2025 was 92 (Moderate), in 2021.
Lansing winter air quality, year by year
Lansing winter air quality by year (Lansing-East Lansing, MI, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 90 | 43 | 0 | 78 | PM2.5 |
| 2020 | 91 | 35 | 0 | 74 | PM2.5 |
| 2021worst | 90 | 52 | 0 | 88 | PM2.5 |
| 2022 | 90 | 48 | 0 | 92 | PM2.5 |
| 2023 | 90 | 35 | 0 | 82 | O3 |
| 2024 | 91 | 35 | 0 | 85 | PM2.5 |
| 2025cleanest | 90 | 32 | 0 | 68 | PM2.5 |
What winter air means in Lansing
A typical winter day in Lansing sits in the Good range (median AQI 38), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of winter days reached AQI 101+ in 2019–2025.
Winter's median AQI of 38 is in line with Lansing's whole-year median of 40, so this period is neither a clean nor a dirty stretch for the area. Nationally, the median Winter AQI across every EPA metro area (278,620 metro-days, 2019–2025) is 40, so Lansing runs in line with the national Winter norm; 0.0% of its Winter days topped AQI 100 versus 0.6% nationally (about the same).
Within the season, December is the cleanest month (median AQI 34, 0.0% of days above 100) and January the worst (median 40, 0.0% above 100).
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Lansing
The latest EPA AirNow observation puts Lansing's AQI at 28 (PM2.5). The figures above are multi-year season statistics, not today's reading.
View current Lansing air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Lansing-East Lansing, MI), 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.