Springfield, MA Air Quality in October
Across 2019–2025, Springfield's October air quality had a median AQI of 37 (Good) over 216 monitored days in the Springfield, MA area. 0.0% of October days (0 of 216) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 64.4% of days. The cleanest October on record here was 2025 (median AQI 30, 0 days above 100) and the worst was 2022 (median 51, 0 days above 100, peak AQI 74).
- Good: 75.5%
- Moderate: 24.5%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
Improve Indoor Air Quality
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How is the air in Springfield in October?
Good on a typical day: median AQI 37 across 2019–2025, with 0.0% of October days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓75.5% of October days were Good (AQI 0–50), 24.5% Moderate (51–100).
- ✓0 days of 216 reached AQI 101+; the October peak was 77.
- ✓Best October: 2025; worst October: 2022.
Frequently asked questions
What is the air quality like in Springfield in October?▾
Across 2019–2025, the median daily AQI in Springfield in October was 37 (Good). 75.5% of days were Good, 24.5% Moderate, and 0.0% reached Unhealthy for Sensitive Groups or worse, based on 216 monitored days in EPA's Air Quality System.
Is October a good time for outdoor exercise in Springfield?▾
A typical October day in Springfield sits in the Good range (median AQI 37), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of October days reached AQI 101+ in 2019–2025.
Which pollutant causes Springfield's October air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 64.4% of October days in Springfield. The highest October AQI recorded in 2019–2025 was 77 (Moderate), in 2022.
Springfield October air quality, year by year
Springfield October air quality by year (Springfield, MA, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 30 | 39 | 0 | 59 | PM2.5 |
| 2020 | 31 | 38 | 0 | 61 | PM2.5 |
| 2021 | 31 | 42 | 0 | 58 | PM2.5 |
| 2022worst | 31 | 51 | 0 | 74 | PM2.5 |
| 2023 | 31 | 32 | 0 | 69 | O3 |
| 2024 | 31 | 35 | 0 | 61 | O3 |
| 2025cleanest | 31 | 30 | 0 | 77 | O3 |
What October air means in Springfield
A typical October day in Springfield sits in the Good range (median AQI 37), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of October days reached AQI 101+ in 2019–2025.
October's median AQI of 37 is below Springfield's whole-year median of 44, making it one of the area's cleaner periods. Nationally, the median October AQI across every EPA metro area (102,872 metro-days, 2019–2025) is 38, so Springfield runs in line with the national October norm; 0.0% of its October days topped AQI 100 versus 1.3% nationally (below average).
October is part of Springfield's fall season (September, October, November); the fall page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Springfield
The latest EPA AirNow observation puts Springfield's AQI at 33 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current Springfield air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Springfield, MA), 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.