Lansing Air Quality in December
Across 2019–2025, Lansing's December air quality had a median AQI of 34 (Good) over 217 monitored days in the Lansing-East Lansing, MI area. 0.0% of December days (0 of 217) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 61.3% of days. The cleanest December on record here was 2020 (median AQI 26, 0 days above 100) and the worst was 2019 (median 48, 0 days above 100, peak AQI 76).
- Good: 70.0%
- Moderate: 30.0%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
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How is the air in Lansing in December?
Good on a typical day: median AQI 34 across 2019–2025, with 0.0% of December days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓70.0% of December days were Good (AQI 0–50), 30.0% Moderate (51–100).
- ✓0 days of 217 reached AQI 101+; the December peak was 76.
- ✓Best December: 2020; worst December: 2019.
Frequently asked questions
What is the air quality like in Lansing in December?▾
Across 2019–2025, the median daily AQI in Lansing in December was 34 (Good). 70.0% of days were Good, 30.0% Moderate, and 0.0% reached Unhealthy for Sensitive Groups or worse, based on 217 monitored days in EPA's Air Quality System.
Is December a good time for outdoor exercise in Lansing?▾
A typical December day in Lansing sits in the Good range (median AQI 34), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of December days reached AQI 101+ in 2019–2025.
Which pollutant causes Lansing's December air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 61.3% of December days in Lansing. The highest December AQI recorded in 2019–2025 was 76 (Moderate), in 2019.
Lansing December air quality, year by year
Lansing December air quality by year (Lansing-East Lansing, MI, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019worst | 31 | 48 | 0 | 76 | PM2.5 |
| 2020cleanest | 31 | 26 | 0 | 74 | O3 |
| 2021 | 31 | 42 | 0 | 74 | PM2.5 |
| 2022 | 31 | 45 | 0 | 76 | PM2.5 |
| 2023 | 31 | 37 | 0 | 65 | PM2.5 |
| 2024 | 31 | 34 | 0 | 65 | PM2.5 |
| 2025 | 31 | 31 | 0 | 65 | O3 |
What December air means in Lansing
A typical December day in Lansing sits in the Good range (median AQI 34), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of December days reached AQI 101+ in 2019–2025.
December's median AQI of 34 is below Lansing's whole-year median of 40, making it one of the area's cleaner periods. Nationally, the median December AQI across every EPA metro area (95,590 metro-days, 2019–2025) is 39, so Lansing runs below the national December norm; 0.0% of its December days topped AQI 100 versus 0.7% nationally (about the same).
December is part of Lansing's winter season (December, January, February); the winter page pools all three months.
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 month 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.