Oklahoma City Air Quality in Winter
Across 2019–2025, Oklahoma City's winter (December–February) air quality had a median AQI of 49 (Good) over 632 monitored days in the Oklahoma City, OK area. 0.0% of winter days (0 of 632) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 85.8% of days. The cleanest winter on record here was 2025 (median AQI 43, 0 days above 100) and the worst was 2021 (median 55, 0 days above 100, peak AQI 90).
- Good: 50.3%
- Moderate: 49.7%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
Extra Protection for Oklahoma City Homes
Air quality in Oklahoma City is moderate (AQI 73), 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
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How is the air in Oklahoma City in winter?
Good on a typical day: median AQI 49 across 2019–2025, with 0.0% of winter days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓50.3% of winter days were Good (AQI 0–50), 49.7% Moderate (51–100).
- ✓0 days of 632 reached AQI 101+; the winter peak was 93.
- ✓Cleanest month: December; worst month: February.
Frequently asked questions
What is the air quality like in Oklahoma City in winter?▾
Across 2019–2025, the median daily AQI in Oklahoma City in winter was 49 (Good). 50.3% of days were Good, 49.7% Moderate, and 0.0% reached Unhealthy for Sensitive Groups or worse, based on 632 monitored days in EPA's Air Quality System.
Is winter a good time for outdoor exercise in Oklahoma City?▾
A typical winter day in Oklahoma City sits in the Good range (median AQI 49), 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 Oklahoma City's winter air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 85.8% of winter days in Oklahoma City. The highest winter AQI recorded in 2019–2025 was 93 (Moderate), in 2021.
Oklahoma City winter air quality, year by year
Oklahoma City winter air quality by year (Oklahoma City, OK, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 90 | 54 | 0 | 90 | PM2.5 |
| 2020 | 91 | 48 | 0 | 69 | PM2.5 |
| 2021worst | 90 | 55 | 0 | 90 | PM2.5 |
| 2022 | 90 | 49 | 0 | 76 | PM2.5 |
| 2023 | 90 | 46 | 0 | 93 | PM2.5 |
| 2024 | 91 | 47 | 0 | 72 | PM2.5 |
| 2025cleanest | 90 | 43 | 0 | 67 | PM2.5 |
What winter air means in Oklahoma City
A typical winter day in Oklahoma City sits in the Good range (median AQI 49), 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 49 is below Oklahoma City's whole-year median of 54, making it one of the area's cleaner periods. Nationally, the median Winter AQI across every EPA metro area (278,620 metro-days, 2019–2025) is 40, so Oklahoma City runs above the national Winter norm; 0.0% of its Winter days topped AQI 100 versus 0.6% nationally (about the same).
Within the season, December is the cleanest month (median AQI 49, 0.0% of days above 100) and February the worst (median 51, 0.0% above 100).
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Oklahoma City
The latest EPA AirNow observation puts Oklahoma City's AQI at 73 (PM2.5). The figures above are multi-year season statistics, not today's reading.
View current Oklahoma City air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Oklahoma City, OK), 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.