Vancouver Air Quality in March
Across 2019–2025, Vancouver's March air quality had a median AQI of 39 (Good) over 217 monitored days in the Portland-Vancouver-Hillsboro, OR-WA area. 0.0% of March days (0 of 217) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 55.8% of days. The cleanest March on record here was 2023 (median AQI 35, 0 days above 100) and the worst was 2021 (median 49, 0 days above 100, peak AQI 94).
- Good: 73.3%
- Moderate: 26.7%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
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How is the air in Vancouver in March?
Good on a typical day: median AQI 39 across 2019–2025, with 0.0% of March days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓73.3% of March days were Good (AQI 0–50), 26.7% Moderate (51–100).
- ✓0 days of 217 reached AQI 101+; the March peak was 94.
- ✓Best March: 2023; worst March: 2021.
Frequently asked questions
What is the air quality like in Vancouver in March?▾
Across 2019–2025, the median daily AQI in Vancouver in March was 39 (Good). 73.3% of days were Good, 26.7% Moderate, and 0.0% 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 Vancouver?▾
A typical March day in Vancouver sits in the Good range (median AQI 39), 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 Vancouver's March air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 55.8% of March days in Vancouver. The highest March AQI recorded in 2019–2025 was 94 (Moderate), in 2021.
Vancouver March air quality, year by year
Vancouver March air quality by year (Portland-Vancouver-Hillsboro, OR-WA, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 31 | 44 | 0 | 63 | PM2.5 |
| 2020 | 31 | 43 | 0 | 76 | PM2.5 |
| 2021worst | 31 | 49 | 0 | 94 | PM2.5 |
| 2022 | 31 | 37 | 0 | 73 | PM2.5 |
| 2023cleanest | 31 | 35 | 0 | 69 | O3 |
| 2024 | 31 | 38 | 0 | 60 | O3 |
| 2025 | 31 | 36 | 0 | 61 | O3 |
What March air means in Vancouver
A typical March day in Vancouver sits in the Good range (median AQI 39), 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 39 is in line with Vancouver'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 Vancouver 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 Vancouver's spring season (March, April, May); the spring page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Vancouver
The latest EPA AirNow observation puts Vancouver's AQI at 28 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current Vancouver air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Portland-Vancouver-Hillsboro, OR-WA), 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.