Spokane Air Quality in April
Across 2019–2025, Spokane's April air quality had a median AQI of 34 (Good) over 210 monitored days in the Spokane-Spokane Valley, WA area. 0.5% of April days (1 of 210) reached Unhealthy for Sensitive Groups or worse, and fine particulate matter (PM2.5) set the daily AQI on 70.5% of days. The cleanest April on record here was 2024 (median AQI 22, 0 days above 100) and the worst was 2022 (median 37, 1 day above 100, peak AQI 103).
- Good: 88.6%
- Moderate: 11.0%
- Unhealthy for Sensitive Groups: 0.5%
- Unhealthy or worse: 0.0%
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How is the air in Spokane in April?
Good on a typical day: median AQI 34 across 2019–2025, with 0.5% of April days above AQI 100. Fine particulate matter (PM2.5) is the main driver.
- ✓88.6% of April days were Good (AQI 0–50), 11.0% Moderate (51–100).
- ✓1 day of 210 reached AQI 101+; the April peak was 103.
- ✓Best April: 2024; worst April: 2022.
Frequently asked questions
What is the air quality like in Spokane in April?▾
Across 2019–2025, the median daily AQI in Spokane in April was 34 (Good). 88.6% of days were Good, 11.0% 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 Spokane?▾
A typical April day in Spokane sits in the Good range (median AQI 34), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of April days reached AQI 101+ in 2019–2025.
Which pollutant causes Spokane's April air quality problems?▾
Fine particulate matter (PM2.5) set the daily AQI on 70.5% of April days in Spokane. The highest April AQI recorded in 2019–2025 was 103 (Unhealthy for Sensitive Groups), in 2022.
Spokane April air quality, year by year
Spokane April air quality by year (Spokane-Spokane Valley, WA, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 30 | 25 | 0 | 52 | PM2.5 |
| 2020 | 30 | 37 | 0 | 52 | PM2.5 |
| 2021 | 30 | 43 | 0 | 54 | O3 |
| 2022worst | 30 | 37 | 1 | 103 | O3 |
| 2023 | 30 | 40 | 0 | 67 | O3 |
| 2024cleanest | 30 | 22 | 0 | 73 | PM2.5 |
| 2025 | 30 | 27 | 0 | 53 | PM2.5 |
What April air means in Spokane
A typical April day in Spokane sits in the Good range (median AQI 34), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of April days reached AQI 101+ in 2019–2025.
April's median AQI of 34 is below Spokane's whole-year median of 47, 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 Spokane runs below the national April norm; 0.5% of its April days topped AQI 100 versus 0.7% nationally (about the same).
April is part of Spokane's spring season (March, April, May); the spring page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Spokane
The latest EPA AirNow observation puts Spokane's AQI at 26 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current Spokane air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Spokane-Spokane Valley, 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.