Sioux Falls Air Quality in November
Across 2019–2025, Sioux Falls's November air quality had a median AQI of 28 (Good) over 210 monitored days in the Sioux Falls, SD area. 0.0% of November days (0 of 210) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 54.8% of days. The cleanest November on record here was 2024 (median AQI 24, 0 days above 100) and the worst was 2020 (median 31, 0 days above 100, peak AQI 62).
- Good: 93.8%
- Moderate: 6.2%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
Reduce Indoor Ozone in Sioux Falls
Today's main pollutant in Sioux Falls is ground-level ozone (AQI 24). 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
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How is the air in Sioux Falls in November?
Good on a typical day: median AQI 28 across 2019–2025, with 0.0% of November days above AQI 100. Ground-level ozone is the main driver.
- ✓93.8% of November days were Good (AQI 0–50), 6.2% Moderate (51–100).
- ✓0 days of 210 reached AQI 101+; the November peak was 62.
- ✓Best November: 2024; worst November: 2020.
Frequently asked questions
What is the air quality like in Sioux Falls in November?▾
Across 2019–2025, the median daily AQI in Sioux Falls in November was 28 (Good). 93.8% of days were Good, 6.2% Moderate, and 0.0% reached Unhealthy for Sensitive Groups or worse, based on 210 monitored days in EPA's Air Quality System.
Is November a good time for outdoor exercise in Sioux Falls?▾
A typical November day in Sioux Falls sits in the Good range (median AQI 28), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of November days reached AQI 101+ in 2019–2025.
Which pollutant causes Sioux Falls's November air quality problems?▾
Ground-level ozone set the daily AQI on 54.8% of November days in Sioux Falls. The highest November AQI recorded in 2019–2025 was 62 (Moderate), in 2020.
Sioux Falls November air quality, year by year
Sioux Falls November air quality by year (Sioux Falls, SD, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 30 | 27 | 0 | 49 | O3 |
| 2020worst | 30 | 31 | 0 | 62 | O3 |
| 2021 | 30 | 28 | 0 | 59 | O3 |
| 2022 | 30 | 30 | 0 | 52 | O3 |
| 2023 | 30 | 30 | 0 | 61 | O3 |
| 2024cleanest | 30 | 24 | 0 | 54 | O3 |
| 2025 | 30 | 28 | 0 | 44 | O3 |
What November air means in Sioux Falls
A typical November day in Sioux Falls sits in the Good range (median AQI 28), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of November days reached AQI 101+ in 2019–2025.
November's median AQI of 28 is below Sioux Falls's whole-year median of 38, making it one of the area's cleaner periods. Nationally, the median November AQI across every EPA metro area (92,704 metro-days, 2019–2025) is 39, so Sioux Falls runs below the national November norm; 0.0% of its November days topped AQI 100 versus 0.6% nationally (about the same).
November is part of Sioux Falls's fall season (September, October, November); the fall page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Sioux Falls
The latest EPA AirNow observation puts Sioux Falls's AQI at 24 (O3). The figures above are multi-year month statistics, not today's reading.
View current Sioux Falls air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Sioux Falls, SD), 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.