White Plains Air Quality in December
Across 2019–2025, White Plains'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%
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How is the air in White Plains 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 White Plains in December?▾
Across 2019–2025, the median daily AQI in White Plains 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 White Plains?▾
A typical December day in White Plains 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 White Plains's December air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 91.2% of December days in White Plains. The highest December AQI recorded in 2019–2025 was 127 (Unhealthy for Sensitive Groups), in 2020.
White Plains December air quality, year by year
White Plains 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 White Plains
A typical December day in White Plains 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 White Plains'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 White Plains 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 White Plains's winter season (December, January, February); the winter page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in White Plains
The latest EPA AirNow observation puts White Plains's AQI at 45 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current White Plains 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.