Cleveland Air Quality in January
Across 2019–2025, Cleveland's January air quality had a median AQI of 56 (Moderate) over 217 monitored days in the Cleveland-Elyria, OH area. 0.0% of January days (0 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 January on record here was 2025 (median AQI 52, 0 days above 100) and the worst was 2021 (median 61, 0 days above 100, peak AQI 94).
- Good: 27.2%
- Moderate: 72.8%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
Reduce Indoor Ozone in Cleveland
Today's main pollutant in Cleveland is ground-level ozone (AQI 44). Important: standard HEPA filters do NOT remove ozone — only a purifier with a substantial activated-carbon bed adsorbs it. The biggest wins are cutting indoor sources (gas appliances, certain "ionizer" purifiers) and ventilating when outdoor ozone is low (early morning). A high-carbon unit helps with the gases and VOCs that linger indoors.
Recommended: Levoit Core 300 — True HEPA + activated carbon · CADR ~141 CFM · rooms up to 219 sq ft
As an Amazon Associate, we earn from qualifying purchases.
How is the air in Cleveland in January?
Moderate on a typical day: median AQI 56 across 2019–2025, with 0.0% of January days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓27.2% of January days were Good (AQI 0–50), 72.8% Moderate (51–100).
- ✓0 days of 217 reached AQI 101+; the January peak was 95.
- ✓Best January: 2025; worst January: 2021.
Frequently asked questions
What is the air quality like in Cleveland in January?▾
Across 2019–2025, the median daily AQI in Cleveland in January was 56 (Moderate). 27.2% of days were Good, 72.8% Moderate, and 0.0% reached Unhealthy for Sensitive Groups or worse, based on 217 monitored days in EPA's Air Quality System.
Is January a good time for outdoor exercise in Cleveland?▾
A typical January day in Cleveland is Moderate (median AQI 56): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and fewer than 1% of January 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 Cleveland's January air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 91.2% of January days in Cleveland. The highest January AQI recorded in 2019–2025 was 95 (Moderate), in 2021.
Cleveland January air quality, year by year
Cleveland January air quality by year (Cleveland-Elyria, OH, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 31 | 58 | 0 | 85 | PM2.5 |
| 2020 | 31 | 55 | 0 | 84 | PM2.5 |
| 2021worst | 31 | 61 | 0 | 94 | PM2.5 |
| 2022 | 31 | 56 | 0 | 95 | PM2.5 |
| 2023 | 31 | 55 | 0 | 80 | PM2.5 |
| 2024 | 31 | 53 | 0 | 74 | PM2.5 |
| 2025cleanest | 31 | 52 | 0 | 83 | PM2.5 |
What January air means in Cleveland
A typical January day in Cleveland is Moderate (median AQI 56): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and fewer than 1% of January days reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
January's median AQI of 56 is in line with Cleveland's whole-year median of 55, so this period is neither a clean nor a dirty stretch for the area. Nationally, the median January AQI across every EPA metro area (95,602 metro-days, 2019–2025) is 39, so Cleveland runs above the national January norm; 0.0% of its January days topped AQI 100 versus 0.7% nationally (about the same).
January is part of Cleveland's winter season (December, January, February); the winter page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Cleveland
The latest EPA AirNow observation puts Cleveland's AQI at 44 (O3). The figures above are multi-year month statistics, not today's reading.
View current Cleveland air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Cleveland-Elyria, OH), 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.