Oklahoma City Air Quality in Fall
Across 2019–2025, Oklahoma City's fall (September–November) air quality had a median AQI of 53 (Moderate) over 637 monitored days in the Oklahoma City, OK area. 2.2% of fall days (14 of 637) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 53.8% of days. The cleanest fall on record here was 2019 (median AQI 53, 0 days above 100) and the worst was 2024 (median 50, 4 days above 100, peak AQI 147).
- Good: 43.0%
- Moderate: 54.8%
- Unhealthy for Sensitive Groups: 2.2%
- 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 fall?
Moderate on a typical day: median AQI 53 across 2019–2025, with 2.2% of fall days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓43.0% of fall days were Good (AQI 0–50), 54.8% Moderate (51–100).
- ✓14 days of 637 reached AQI 101+; the fall peak was 147.
- ✓Cleanest month: November; worst month: September.
Frequently asked questions
What is the air quality like in Oklahoma City in fall?▾
Across 2019–2025, the median daily AQI in Oklahoma City in fall was 53 (Moderate). 43.0% of days were Good, 54.8% Moderate, and 2.2% reached Unhealthy for Sensitive Groups or worse, based on 637 monitored days in EPA's Air Quality System.
Is fall a good time for outdoor exercise in Oklahoma City?▾
A typical fall day in Oklahoma City is Moderate (median AQI 53): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and about 1 day in 45 of fall days (2.2%) reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
Which pollutant causes Oklahoma City's fall air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 53.8% of fall days in Oklahoma City. The highest fall AQI recorded in 2019–2025 was 147 (Unhealthy for Sensitive Groups), in 2024.
Oklahoma City fall air quality, year by year
Oklahoma City fall air quality by year (Oklahoma City, OK, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019cleanest | 91 | 53 | 0 | 100 | PM2.5 |
| 2020 | 91 | 54 | 1 | 112 | PM2.5 |
| 2021 | 91 | 53 | 1 | 101 | PM2.5 |
| 2022 | 91 | 54 | 3 | 129 | PM2.5 |
| 2023 | 91 | 50 | 4 | 115 | O3 |
| 2024worst | 91 | 50 | 4 | 147 | O3 |
| 2025 | 91 | 52 | 1 | 126 | O3 |
What fall air means in Oklahoma City
A typical fall day in Oklahoma City is Moderate (median AQI 53): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and about 1 day in 45 of fall days (2.2%) reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
Fall's median AQI of 53 is in line with Oklahoma City's whole-year median of 54, so this period is neither a clean nor a dirty stretch for the area. Nationally, the median Fall AQI across every EPA metro area (296,275 metro-days, 2019–2025) is 40, so Oklahoma City runs above the national Fall norm; 2.2% of its Fall days topped AQI 100 versus 1.5% nationally (about the same).
Within the season, November is the cleanest month (median AQI 47, 0.0% of days above 100) and September the worst (median 61, 4.3% 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.