Syracuse Air Quality in December
Across 2019–2025, Syracuse's December air quality had a median AQI of 34 (Good) over 217 monitored days in the Syracuse, NY 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 65.9% of days. The cleanest December on record here was 2024 (median AQI 31, 0 days above 100) and the worst was 2019 (median 39, 0 days above 100, peak AQI 65).
- Good: 78.8%
- Moderate: 21.2%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
Extra Protection for Syracuse Homes
Air quality in Syracuse is moderate (AQI 56), 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 Syracuse 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.
- ✓78.8% of December days were Good (AQI 0–50), 21.2% Moderate (51–100).
- ✓0 days of 217 reached AQI 101+; the December peak was 65.
- ✓Best December: 2024; worst December: 2019.
Frequently asked questions
What is the air quality like in Syracuse in December?▾
Across 2019–2025, the median daily AQI in Syracuse in December was 34 (Good). 78.8% of days were Good, 21.2% 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 Syracuse?▾
A typical December day in Syracuse 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 Syracuse's December air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 65.9% of December days in Syracuse. The highest December AQI recorded in 2019–2025 was 65 (Moderate), in 2019.
Syracuse December air quality, year by year
Syracuse December air quality by year (Syracuse, NY, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019worst | 31 | 39 | 0 | 65 | PM2.5 |
| 2020 | 31 | 32 | 0 | 65 | PM2.5 |
| 2021 | 31 | 36 | 0 | 64 | PM2.5 |
| 2022 | 31 | 37 | 0 | 55 | PM2.5 |
| 2023 | 31 | 35 | 0 | 63 | PM2.5 |
| 2024cleanest | 31 | 31 | 0 | 61 | O3 |
| 2025 | 31 | 33 | 0 | 54 | O3 |
What December air means in Syracuse
A typical December day in Syracuse 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 Syracuse's whole-year median of 38, 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 Syracuse 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 Syracuse's winter season (December, January, February); the winter page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Syracuse
The latest EPA AirNow observation puts Syracuse's AQI at 56 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current Syracuse air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Syracuse, NY), 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.