Winston-Salem Air Quality in April
Across 2019–2025, Winston-Salem's April air quality had a median AQI of 51 (Moderate) over 210 monitored days in the Winston-Salem, NC area. 0.5% of April days (1 of 210) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 61.9% of days. The cleanest April on record here was 2020 (median AQI 45, 0 days above 100) and the worst was 2023 (median 53, 1 day above 100, peak AQI 105).
- Good: 50.0%
- Moderate: 49.5%
- Unhealthy for Sensitive Groups: 0.5%
- Unhealthy or worse: 0.0%
Extra Protection for Winston-Salem Homes
Air quality in Winston-Salem is moderate (AQI 52), 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 Winston-Salem in April?
Moderate on a typical day: median AQI 51 across 2019–2025, with 0.5% of April days above AQI 100. Ground-level ozone is the main driver.
- ✓50.0% of April days were Good (AQI 0–50), 49.5% Moderate (51–100).
- ✓1 day of 210 reached AQI 101+; the April peak was 105.
- ✓Best April: 2020; worst April: 2023.
Frequently asked questions
What is the air quality like in Winston-Salem in April?▾
Across 2019–2025, the median daily AQI in Winston-Salem in April was 51 (Moderate). 50.0% of days were Good, 49.5% Moderate, and 0.5% reached Unhealthy for Sensitive Groups or worse, based on 210 monitored days in EPA's Air Quality System.
Is April a good time for outdoor exercise in Winston-Salem?▾
A typical April day in Winston-Salem is Moderate (median AQI 51): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and fewer than 1% of April days reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
Which pollutant causes Winston-Salem's April air quality problems?▾
Ground-level ozone set the daily AQI on 61.9% of April days in Winston-Salem. The highest April AQI recorded in 2019–2025 was 105 (Unhealthy for Sensitive Groups), in 2023.
Winston-Salem April air quality, year by year
Winston-Salem April air quality by year (Winston-Salem, NC, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 30 | 54 | 0 | 77 | O3 |
| 2020cleanest | 30 | 45 | 0 | 57 | O3 |
| 2021 | 30 | 51 | 0 | 87 | O3 |
| 2022 | 30 | 49 | 0 | 64 | O3 |
| 2023worst | 30 | 53 | 1 | 105 | O3 |
| 2024 | 30 | 52 | 0 | 84 | O3 |
| 2025 | 30 | 53 | 0 | 90 | PM2.5 |
What April air means in Winston-Salem
A typical April day in Winston-Salem is Moderate (median AQI 51): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and fewer than 1% of April days reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
April's median AQI of 51 is in line with Winston-Salem's whole-year median of 50, so this period is neither a clean nor a dirty stretch for the area. Nationally, the median April AQI across every EPA metro area (100,677 metro-days, 2019–2025) is 44, so Winston-Salem runs above the national April norm; 0.5% of its April days topped AQI 100 versus 0.7% nationally (about the same).
April is part of Winston-Salem's spring season (March, April, May); the spring page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Winston-Salem
The latest EPA AirNow observation puts Winston-Salem's AQI at 52 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current Winston-Salem air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Winston-Salem, NC), 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.