Long Beach Air Quality in March
Across 2019–2025, Long Beach's March air quality had a median AQI of 55 (Moderate) over 217 monitored days in the Los Angeles-Long Beach-Anaheim, CA area. 0.5% of March days (1 of 217) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 63.6% of days. The cleanest March on record here was 2020 (median AQI 47, 0 days above 100) and the worst was 2019 (median 57, 1 day above 100, peak AQI 108).
- Good: 30.9%
- Moderate: 68.7%
- Unhealthy for Sensitive Groups: 0.5%
- Unhealthy or worse: 0.0%
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How is the air in Long Beach in March?
Moderate on a typical day: median AQI 55 across 2019–2025, with 0.5% of March days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓30.9% of March days were Good (AQI 0–50), 68.7% Moderate (51–100).
- ✓1 day of 217 reached AQI 101+; the March peak was 108.
- ✓Best March: 2020; worst March: 2019.
Frequently asked questions
What is the air quality like in Long Beach in March?▾
Across 2019–2025, the median daily AQI in Long Beach in March was 55 (Moderate). 30.9% of days were Good, 68.7% Moderate, and 0.5% reached Unhealthy for Sensitive Groups or worse, based on 217 monitored days in EPA's Air Quality System.
Is March a good time for outdoor exercise in Long Beach?▾
A typical March day in Long Beach is Moderate (median AQI 55): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and fewer than 1% of March 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 Long Beach's March air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 63.6% of March days in Long Beach. The highest March AQI recorded in 2019–2025 was 108 (Unhealthy for Sensitive Groups), in 2019.
Long Beach March air quality, year by year
Long Beach March air quality by year (Los Angeles-Long Beach-Anaheim, CA, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019worst | 31 | 57 | 1 | 108 | PM2.5 |
| 2020cleanest | 31 | 47 | 0 | 75 | PM2.5 |
| 2021 | 31 | 57 | 0 | 80 | PM2.5 |
| 2022 | 31 | 62 | 0 | 87 | PM2.5 |
| 2023 | 31 | 55 | 0 | 64 | PM2.5 |
| 2024 | 31 | 48 | 0 | 84 | PM2.5 |
| 2025 | 31 | 56 | 0 | 93 | PM2.5 |
What March air means in Long Beach
A typical March day in Long Beach is Moderate (median AQI 55): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and fewer than 1% of March days reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
March's median AQI of 55 is below Long Beach's whole-year median of 74, making it one of the area's cleaner periods. Nationally, the median March AQI across every EPA metro area (102,455 metro-days, 2019–2025) is 42, so Long Beach runs above the national March norm; 0.5% of its March days topped AQI 100 versus 0.4% nationally (about the same).
March is part of Long Beach's spring season (March, April, May); the spring page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Long Beach
The latest EPA AirNow observation puts Long Beach's AQI at 36 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current Long Beach air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Los Angeles-Long Beach-Anaheim, 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.