Charleston, WV Air Quality in March
Across 2019–2025, Charleston's March air quality had a median AQI of 43 (Good) over 216 monitored days in the Charleston, WV area. 0.0% of March days (0 of 216) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 52.8% of days. The cleanest March on record here was 2024 (median AQI 32, 0 days above 100) and the worst was 2019 (median 48, 0 days above 100, peak AQI 64).
- Good: 77.3%
- Moderate: 22.7%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
Extra Protection for Charleston Homes
Air quality in Charleston is moderate (AQI 55), 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 Charleston in March?
Good on a typical day: median AQI 43 across 2019–2025, with 0.0% of March days above AQI 100. Ground-level ozone is the main driver.
- ✓77.3% of March days were Good (AQI 0–50), 22.7% Moderate (51–100).
- ✓0 days of 216 reached AQI 101+; the March peak was 90.
- ✓Best March: 2024; worst March: 2019.
Frequently asked questions
What is the air quality like in Charleston in March?▾
Across 2019–2025, the median daily AQI in Charleston in March was 43 (Good). 77.3% of days were Good, 22.7% Moderate, and 0.0% reached Unhealthy for Sensitive Groups or worse, based on 216 monitored days in EPA's Air Quality System.
Is March a good time for outdoor exercise in Charleston?▾
A typical March day in Charleston sits in the Good range (median AQI 43), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of March days reached AQI 101+ in 2019–2025.
Which pollutant causes Charleston's March air quality problems?▾
Ground-level ozone set the daily AQI on 52.8% of March days in Charleston. The highest March AQI recorded in 2019–2025 was 90 (Moderate), in 2019.
Charleston March air quality, year by year
Charleston March air quality by year (Charleston, WV, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019worst | 31 | 48 | 0 | 64 | O3 |
| 2020 | 31 | 39 | 0 | 55 | O3 |
| 2021 | 31 | 43 | 0 | 67 | PM2.5 |
| 2022 | 31 | 43 | 0 | 90 | O3 |
| 2023 | 30 | 42 | 0 | 55 | O3 |
| 2024cleanest | 31 | 32 | 0 | 61 | PM2.5 |
| 2025 | 31 | 42 | 0 | 63 | PM2.5 |
What March air means in Charleston
A typical March day in Charleston sits in the Good range (median AQI 43), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of March days reached AQI 101+ in 2019–2025.
March's median AQI of 43 is in line with Charleston's whole-year median of 41, so this period is neither a clean nor a dirty stretch for the area. Nationally, the median March AQI across every EPA metro area (102,455 metro-days, 2019–2025) is 42, so Charleston runs in line with the national March norm; 0.0% of its March days topped AQI 100 versus 0.4% nationally (about the same).
March is part of Charleston's spring season (March, April, May); the spring page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Charleston
The latest EPA AirNow observation puts Charleston's AQI at 55 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current Charleston air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Charleston, WV), 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.