Fargo Air Quality in Fall
Across 2019–2025, Fargo's fall (September–November) air quality had a median AQI of 34 (Good) over 636 monitored days in the Fargo, ND-MN area. 0.5% of fall days (3 of 636) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 64.6% of days. The cleanest fall on record here was 2019 (median AQI 26, 0 days above 100) and the worst was 2023 (median 32, 2 days above 100, peak AQI 149).
- Good: 78.5%
- Moderate: 21.1%
- Unhealthy for Sensitive Groups: 0.3%
- Unhealthy or worse: 0.2%
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How is the air in Fargo in fall?
Good on a typical day: median AQI 34 across 2019–2025, with 0.5% of fall days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓78.5% of fall days were Good (AQI 0–50), 21.1% Moderate (51–100).
- ✓3 days of 636 reached AQI 101+; the fall peak was 158.
- ✓Cleanest month: November; worst month: September.
Frequently asked questions
What is the air quality like in Fargo in fall?▾
Across 2019–2025, the median daily AQI in Fargo in fall was 34 (Good). 78.5% of days were Good, 21.1% Moderate, and 0.5% reached Unhealthy for Sensitive Groups or worse, based on 636 monitored days in EPA's Air Quality System.
Is fall a good time for outdoor exercise in Fargo?▾
A typical fall day in Fargo sits in the Good range (median AQI 34), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of fall days reached AQI 101+ in 2019–2025.
Which pollutant causes Fargo's fall air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 64.6% of fall days in Fargo. The highest fall AQI recorded in 2019–2025 was 158 (Unhealthy), in 2023.
Fargo fall air quality, year by year
Fargo fall air quality by year (Fargo, ND-MN, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019cleanest | 91 | 26 | 0 | 58 | O3 |
| 2020 | 90 | 38 | 0 | 67 | PM2.5 |
| 2021 | 91 | 34 | 0 | 85 | PM2.5 |
| 2022 | 91 | 45 | 0 | 93 | PM2.5 |
| 2023worst | 91 | 32 | 2 | 149 | PM2.5 |
| 2024 | 91 | 38 | 1 | 158 | PM2.5 |
| 2025 | 91 | 30 | 0 | 82 | PM2.5 |
What fall air means in Fargo
A typical fall day in Fargo sits in the Good range (median AQI 34), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of fall days reached AQI 101+ in 2019–2025.
Fall's median AQI of 34 is below Fargo's whole-year median of 38, making it one of the area's cleaner periods. Nationally, the median Fall AQI across every EPA metro area (296,275 metro-days, 2019–2025) is 40, so Fargo runs below the national Fall norm; 0.5% of its Fall days topped AQI 100 versus 1.5% nationally (about the same).
Within the season, November is the cleanest month (median AQI 31, 0.0% of days above 100) and September the worst (median 37, 1.5% above 100).
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Fargo
The latest EPA AirNow observation puts Fargo's AQI at 24 (PM2.5). The figures above are multi-year season statistics, not today's reading.
View current Fargo air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Fargo, ND-MN), 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.