Sacramento Air Quality in April
Across 2019–2025, Sacramento's April air quality had a median AQI of 51 (Moderate) over 210 monitored days in the Sacramento--Roseville--Arden-Arcade, CA area. 1.0% of April days (2 of 210) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 73.3% of days. The cleanest April on record here was 2022 (median AQI 47, 0 days above 100) and the worst was 2021 (median 55, 1 day above 100, peak AQI 105).
- Good: 49.5%
- Moderate: 49.5%
- Unhealthy for Sensitive Groups: 1.0%
- Unhealthy or worse: 0.0%
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How is the air in Sacramento in April?
Moderate on a typical day: median AQI 51 across 2019–2025, with 1.0% of April days above AQI 100. Ground-level ozone is the main driver.
- ✓49.5% of April days were Good (AQI 0–50), 49.5% Moderate (51–100).
- ✓2 days of 210 reached AQI 101+; the April peak was 105.
- ✓Best April: 2022; worst April: 2021.
Frequently asked questions
What is the air quality like in Sacramento in April?▾
Across 2019–2025, the median daily AQI in Sacramento in April was 51 (Moderate). 49.5% of days were Good, 49.5% Moderate, and 1.0% 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 Sacramento?▾
A typical April day in Sacramento is Moderate (median AQI 51): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and about 1 day in 100 of April days (1.0%) reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
Which pollutant causes Sacramento's April air quality problems?▾
Ground-level ozone set the daily AQI on 73.3% of April days in Sacramento. The highest April AQI recorded in 2019–2025 was 105 (Unhealthy for Sensitive Groups), in 2021.
Sacramento April air quality, year by year
Sacramento April air quality by year (Sacramento--Roseville--Arden-Arcade, CA, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 30 | 54 | 0 | 91 | PM2.5 |
| 2020 | 30 | 48 | 0 | 63 | O3 |
| 2021worst | 30 | 55 | 1 | 105 | O3 |
| 2022cleanest | 30 | 47 | 0 | 93 | O3 |
| 2023 | 30 | 54 | 1 | 101 | O3 |
| 2024 | 30 | 50 | 0 | 90 | O3 |
| 2025 | 30 | 50 | 0 | 71 | O3 |
What April air means in Sacramento
A typical April day in Sacramento is Moderate (median AQI 51): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and about 1 day in 100 of April days (1.0%) 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 below Sacramento's whole-year median of 58, making it one of the area's cleaner periods. Nationally, the median April AQI across every EPA metro area (100,677 metro-days, 2019–2025) is 44, so Sacramento runs above the national April norm; 1.0% of its April days topped AQI 100 versus 0.7% nationally (about the same).
April is part of Sacramento's spring season (March, April, May); the spring page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Sacramento
The latest EPA AirNow observation puts Sacramento's AQI at 43 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current Sacramento air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Sacramento--Roseville--Arden-Arcade, CA), 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.