Flint Air Quality in December
Across 2019–2025, Flint's December air quality had a median AQI of 42 (Good) over 177 monitored days in the Flint, MI area. 0.0% of December days (0 of 177) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 100.0% of days. The cleanest December on record here was 2024 (median AQI 33, 0 days above 100) and the worst was 2022 (median 53, 0 days above 100, peak AQI 70).
- Good: 62.1%
- Moderate: 37.9%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
Improve Indoor Air Quality
Even with good outdoor air in Flint, 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 Flint in December?
Good on a typical day: median AQI 42 across 2019–2025, with 0.0% of December days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓62.1% of December days were Good (AQI 0–50), 37.9% Moderate (51–100).
- ✓0 days of 177 reached AQI 101+; the December peak was 75.
- ✓Best December: 2024; worst December: 2022.
Frequently asked questions
What is the air quality like in Flint in December?▾
Across 2019–2025, the median daily AQI in Flint in December was 42 (Good). 62.1% of days were Good, 37.9% Moderate, and 0.0% reached Unhealthy for Sensitive Groups or worse, based on 177 monitored days in EPA's Air Quality System.
Is December a good time for outdoor exercise in Flint?▾
A typical December day in Flint 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 December days reached AQI 101+ in 2019–2025.
Which pollutant causes Flint's December air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 100.0% of December days in Flint. The highest December AQI recorded in 2019–2025 was 75 (Moderate), in 2022.
Flint December air quality, year by year
Flint December air quality by year (Flint, MI, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 31 | 49 | 0 | 68 | PM2.5 |
| 2020 | 31 | 36 | 0 | 75 | PM2.5 |
| 2021 | 31 | 36 | 0 | 66 | PM2.5 |
| 2022worst | 31 | 53 | 0 | 70 | PM2.5 |
| 2023 | 31 | 37 | 0 | 60 | PM2.5 |
| 2024cleanest | 22 | 33 | 0 | 61 | PM2.5 |
What December air means in Flint
A typical December day in Flint 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 December days reached AQI 101+ in 2019–2025.
December's median AQI of 42 is in line with Flint's whole-year median of 42, so this period is neither a clean nor a dirty stretch for the area. Nationally, the median December AQI across every EPA metro area (95,590 metro-days, 2019–2025) is 39, so Flint runs in line with the national December norm; 0.0% of its December days topped AQI 100 versus 0.7% nationally (about the same).
December is part of Flint's winter season (December, January, February); the winter page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Flint
The latest EPA AirNow observation puts Flint's AQI at 20 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current Flint air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Flint, 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.