Toledo Air Quality in Winter
Across 2019–2025, Toledo's winter (December–February) air quality had a median AQI of 43 (Good) over 603 monitored days in the Toledo, OH area. 0.0% of winter days (0 of 603) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 100.0% of days. The cleanest winter on record here was 2022 (median AQI 38, 0 days above 100) and the worst was 2025 (median 55, 0 days above 100, peak AQI 86).
- Good: 62.2%
- Moderate: 37.8%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
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How is the air in Toledo in winter?
Good on a typical day: median AQI 43 across 2019–2025, with 0.0% of winter days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓62.2% of winter days were Good (AQI 0–50), 37.8% Moderate (51–100).
- ✓0 days of 603 reached AQI 101+; the winter peak was 88.
- ✓Cleanest month: January; worst month: December.
Frequently asked questions
What is the air quality like in Toledo in winter?▾
Across 2019–2025, the median daily AQI in Toledo in winter was 43 (Good). 62.2% of days were Good, 37.8% Moderate, and 0.0% reached Unhealthy for Sensitive Groups or worse, based on 603 monitored days in EPA's Air Quality System.
Is winter a good time for outdoor exercise in Toledo?▾
A typical winter day in Toledo 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 winter days reached AQI 101+ in 2019–2025.
Which pollutant causes Toledo's winter air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 100.0% of winter days in Toledo. The highest winter AQI recorded in 2019–2025 was 88 (Moderate), in 2025.
Toledo winter air quality, year by year
Toledo winter air quality by year (Toledo, OH, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 76 | 42 | 0 | 88 | PM2.5 |
| 2020 | 79 | 39 | 0 | 79 | PM2.5 |
| 2021 | 90 | 41 | 0 | 77 | PM2.5 |
| 2022cleanest | 87 | 38 | 0 | 81 | PM2.5 |
| 2023 | 90 | 41 | 0 | 86 | PM2.5 |
| 2024 | 91 | 54 | 0 | 81 | PM2.5 |
| 2025worst | 90 | 55 | 0 | 86 | PM2.5 |
What winter air means in Toledo
A typical winter day in Toledo 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 winter days reached AQI 101+ in 2019–2025.
Winter's median AQI of 43 is in line with Toledo's whole-year median of 45, so this period is neither a clean nor a dirty stretch for the area. Nationally, the median Winter AQI across every EPA metro area (278,620 metro-days, 2019–2025) is 40, so Toledo runs in line with the national Winter norm; 0.0% of its Winter days topped AQI 100 versus 0.6% nationally (about the same).
Within the season, January is the cleanest month (median AQI 41, 0.0% of days above 100) and December the worst (median 46, 0.0% above 100).
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Toledo
The latest EPA AirNow observation puts Toledo's AQI at 33 (PM2.5). The figures above are multi-year season statistics, not today's reading.
View current Toledo air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Toledo, 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.