Air Quality in Mercer Island, United States
Rain
24.4°C · 38.3% humidity
24.4°
Feels 24.4°
16
Good
Air quality is satisfactory. Enjoy outdoor activities.
21 stations
Nearby Monitoring Stations
AQI Forecast
Calibrated
8
2pm
8
8
16
5pm
14
12
11
8pm
10
10
9
11pm
9
9
0
2am
0
0
0
5am
0
0
0
8am
0
0
0
11am
0
0
Station readings
8
8
8
8
CAMS model
adj -46
54
54
54
54
54
54
54
54
54
54
54
54
34
27
25
25
25
25
25
25
25
25
27
27
Air Quality Index Trend
48h · 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.
38.3%
Humidity
48.2 km/h
Wind SSW
1018.5 hPa
Pressure
5.9
UV High
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5
3.92 µg/m³
PM10▲
20.55 µg/m³
050100150200300500
What is the weather forecast for Mercer Island?
Temperature & Precipitation
PM2.5 Trend
48h · 1 stationPM2.53.92 µg/m³
✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX5.9
High
Station readings (21 stations within 25 km)
3.92
Median
3.32
Average
1.27
Low
7.9
High
PM2.5 µg/m³ · Model: 9.75 · Bias: +5.8
What is the 7-day forecast for Mercer Island?
05-29
24.4° 10.2°
12.06 mm
05-30
20.9° 8.6°
0.62 mm
05-31
22.6° 8.7°
06-01
20.1° 4.7°
06-02
26.7° 9.4°
06-03
19.0° 6.7°
0.88 mm
06-04
17.7° 10.4°
1.06 mm
Both models agree
Avg diff: 3.4°C
Where are air quality stations near Mercer Island?
67
SE 12th St, Bellevue, Washington, USA
60
SE 12th St, Bellevue, Washington, USA
42
SE 12th St, Bellevue, Washington, USA
25
SE 12th St, Bellevue, Washington, USA
25
Beacon Hill, Seattle, Washington, USA
8
Seattle-S Myrtle St
8
Seattle-16th Ave S
13
Seattle-13th Ave S
25
10th and Weller, Seattle, Washington, USA
26
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 2026-05-29T00:26 UTC.