Jersey City Air Quality in December
Across 2019–2025, Jersey City's December air quality had a median AQI of 55 (Moderate) over 217 monitored days in the New York-Newark-Jersey City, NY-NJ-PA area. 0.5% of December days (1 of 217) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 91.2% of days. The cleanest December on record here was 2024 (median AQI 48, 0 days above 100) and the worst was 2020 (median 55, 1 day above 100, peak AQI 127).
- Good: 35.5%
- Moderate: 64.1%
- Unhealthy for Sensitive Groups: 0.5%
- Unhealthy or worse: 0.0%
Extra Protection for Jersey City Homes
Air quality in Jersey City 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.
Recommended: Coway AP-1512HH Mighty — True HEPA + carbon · CADR ~246 CFM · rooms up to 361 sq ft
As an Amazon Associate, we earn from qualifying purchases.
How is the air in Jersey City in December?
Moderate on a typical day: median AQI 55 across 2019–2025, with 0.5% of December days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓35.5% of December days were Good (AQI 0–50), 64.1% Moderate (51–100).
- ✓1 day of 217 reached AQI 101+; the December peak was 127.
- ✓Best December: 2024; worst December: 2020.
Frequently asked questions
What is the air quality like in Jersey City in December?▾
Across 2019–2025, the median daily AQI in Jersey City in December was 55 (Moderate). 35.5% of days were Good, 64.1% Moderate, and 0.5% 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 Jersey City?▾
A typical December day in Jersey City is Moderate (median AQI 55): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and fewer than 1% of December days reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
Which pollutant causes Jersey City's December air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 91.2% of December days in Jersey City. The highest December AQI recorded in 2019–2025 was 127 (Unhealthy for Sensitive Groups), in 2020.
Jersey City December air quality, year by year
Jersey City December air quality by year (New York-Newark-Jersey City, NY-NJ-PA, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 31 | 56 | 0 | 96 | PM2.5 |
| 2020worst | 31 | 55 | 1 | 127 | PM2.5 |
| 2021 | 31 | 58 | 0 | 80 | PM2.5 |
| 2022 | 31 | 53 | 0 | 91 | PM2.5 |
| 2023 | 31 | 57 | 0 | 91 | PM2.5 |
| 2024cleanest | 31 | 48 | 0 | 82 | PM2.5 |
| 2025 | 31 | 53 | 0 | 98 | PM2.5 |
What December air means in Jersey City
A typical December day in Jersey City is Moderate (median AQI 55): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and fewer than 1% of December days reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
December's median AQI of 55 is in line with Jersey City's whole-year median of 54, 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 Jersey City runs above the national December norm; 0.5% of its December days topped AQI 100 versus 0.7% nationally (about the same).
December is part of Jersey City's winter season (December, January, February); the winter page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Jersey City
The latest EPA AirNow observation puts Jersey City's AQI at 52 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current Jersey City air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (New York-Newark-Jersey City, NY-NJ-PA), 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.