Greensboro Air Quality in December
Across 2019–2025, Greensboro's December air quality had a median AQI of 43 (Good) over 217 monitored days in the Greensboro-High Point, NC 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 94.9% of days. The cleanest December on record here was 2020 (median AQI 37, 0 days above 100) and the worst was 2021 (median 50, 0 days above 100, peak AQI 61).
- Good: 61.8%
- Moderate: 38.2%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
Extra Protection for Greensboro Homes
Air quality in Greensboro is moderate (AQI 52), with fine particles (PM2.5) the main concern. A True-HEPA purifier gives sensitive groups — kids, seniors and anyone with asthma or allergies — cleaner air indoors on days like today.
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How is the air in Greensboro in December?
Good on a typical day: median AQI 43 across 2019–2025, with 0.0% of December days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓61.8% of December days were Good (AQI 0–50), 38.2% Moderate (51–100).
- ✓0 days of 217 reached AQI 101+; the December peak was 87.
- ✓Best December: 2020; worst December: 2021.
Frequently asked questions
What is the air quality like in Greensboro in December?▾
Across 2019–2025, the median daily AQI in Greensboro in December was 43 (Good). 61.8% of days were Good, 38.2% 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 Greensboro?▾
A typical December day in Greensboro sits in the Good range (median AQI 43), 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 Greensboro's December air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 94.9% of December days in Greensboro. The highest December AQI recorded in 2019–2025 was 87 (Moderate), in 2021.
Greensboro December air quality, year by year
Greensboro December air quality by year (Greensboro-High Point, NC, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 31 | 42 | 0 | 87 | PM2.5 |
| 2020cleanest | 31 | 37 | 0 | 64 | PM2.5 |
| 2021worst | 31 | 50 | 0 | 61 | PM2.5 |
| 2022 | 31 | 47 | 0 | 69 | PM2.5 |
| 2023 | 31 | 41 | 0 | 80 | PM2.5 |
| 2024 | 31 | 46 | 0 | 60 | PM2.5 |
| 2025 | 31 | 37 | 0 | 63 | PM2.5 |
What December air means in Greensboro
A typical December day in Greensboro sits in the Good range (median AQI 43), 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 43 is in line with Greensboro's whole-year median of 44, 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 Greensboro runs above the national December norm; 0.0% of its December days topped AQI 100 versus 0.7% nationally (about the same).
December is part of Greensboro's winter season (December, January, February); the winter page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Greensboro
The latest EPA AirNow observation puts Greensboro's AQI at 52 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current Greensboro air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Greensboro-High Point, NC), 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.