Air Quality in Mercer Island, United States
Windy
14.5°C · 55.3% humidity
14.5°
Feels 14.5°
13
Good
Air quality is satisfactory. Enjoy outdoor activities.
26 stations
Nearby Monitoring Stations
AQI Forecast
Calibrated
9
12pm
8
9
13
3pm
9
8
9
6pm
8
9
9
9pm
9
9
9
12am
9
9
9
3am
9
9
11
6am
11
11
11
9am
11
11
Station readings
12
8
8
CAMS model
adj -16
25
24
25
25
25
24
25
24
25
25
25
25
25
25
25
25
25
25
27
27
27
27
27
27
Air Quality Index Trend
47h · 1 stnMercer Island's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.
55.3%
Humidity
45.4 km/h
Wind NW
1016.7 hPa
Pressure
12.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
3.14 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for Mercer Island?
Temperature & Precipitation
PM2.5 Trend
47h · 1 stationPM2.53.14 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX12.9
Extreme
Station readings (26 stations within 25 km)
3.14
Median
2.78
Average
1.03
Low
7.2
High
PM2.5 µg/m³ · Model: 5.9 · Bias: +2.8
What is the 7-day forecast for Mercer Island?
06-08
22.0° 8.9°
0.5 mm
06-09
14.5° 8.9°
0.5 mm
06-10
19.3° 10.3°
06-11
21.3° 7.6°
06-12
30.9° 11.8°
0.06 mm
06-13
29.9° 6.9°
06-14
22.9° 10.1°
0.31 mm
Both models agree
Avg diff: 4.6°C
Where are air quality stations near Mercer Island?
2
SE 12th St, Bellevue, Washington, USA
30
SE 12th St, Bellevue, Washington, USA
57
SE 12th St, Bellevue, Washington, USA
6
SE 12th St, Bellevue, Washington, USA
5
Beacon Hill, Seattle, Washington, USA
5
Seattle-S Myrtle St
7
Seattle-16th Ave S
5
Seattle-13th Ave S
45
10th and Weller, Seattle, Washington, USA
8
10th and Weller, Seattle, Washington, USA
What cities are near Mercer Island?
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Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-06-08T22:01 UTC.