Lansing Air Quality in May
Across 2019–2025, Lansing's May air quality had a median AQI of 42 (Good) over 217 monitored days in the Lansing-East Lansing, MI area. 0.5% of May days (1 of 217) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 71.0% of days. The cleanest May on record here was 2025 (median AQI 37, 0 days above 100) and the worst was 2023 (median 50, 1 day above 100, peak AQI 105).
- Good: 72.8%
- Moderate: 26.7%
- Unhealthy for Sensitive Groups: 0.5%
- Unhealthy or worse: 0.0%
Improve Indoor Air Quality
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How is the air in Lansing in May?
Good on a typical day: median AQI 42 across 2019–2025, with 0.5% of May days above AQI 100. Ground-level ozone is the main driver.
- ✓72.8% of May days were Good (AQI 0–50), 26.7% Moderate (51–100).
- ✓1 day of 217 reached AQI 101+; the May peak was 105.
- ✓Best May: 2025; worst May: 2023.
Frequently asked questions
What is the air quality like in Lansing in May?▾
Across 2019–2025, the median daily AQI in Lansing in May was 42 (Good). 72.8% of days were Good, 26.7% Moderate, and 0.5% reached Unhealthy for Sensitive Groups or worse, based on 217 monitored days in EPA's Air Quality System.
Is May a good time for outdoor exercise in Lansing?▾
A typical May day in Lansing 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 May days reached AQI 101+ in 2019–2025.
Which pollutant causes Lansing's May air quality problems?▾
Ground-level ozone set the daily AQI on 71.0% of May days in Lansing. The highest May AQI recorded in 2019–2025 was 105 (Unhealthy for Sensitive Groups), in 2023.
Lansing May air quality, year by year
Lansing May 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 | 31 | 39 | 0 | 55 | O3 |
| 2020 | 31 | 40 | 0 | 68 | O3 |
| 2021 | 31 | 45 | 0 | 80 | O3 |
| 2022 | 31 | 45 | 0 | 74 | O3 |
| 2023worst | 31 | 50 | 1 | 105 | O3 |
| 2024 | 31 | 46 | 0 | 80 | O3 |
| 2025cleanest | 31 | 37 | 0 | 90 | O3 |
What May air means in Lansing
A typical May day in Lansing 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 May days reached AQI 101+ in 2019–2025.
May's median AQI of 42 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 May AQI across every EPA metro area (104,064 metro-days, 2019–2025) is 44, so Lansing runs in line with the national May norm; 0.5% of its May days topped AQI 100 versus 1.3% nationally (about the same).
May is part of Lansing's spring season (March, April, May); the spring 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.