Air Quality in Mercer Island, United States

Partly Cloudy
18.2°C · 55.2% humidity
18.2°
Feels 18.2°
15
Good
Air quality is satisfactory. Enjoy outdoor activities.
27 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
9 10am
9
9
15 1pm
14
13
12 4pm
10
10
9 7pm
10
9
9 10pm
9
9
9 1am
9
9
9 4am
9
11
11 7am
11
11
Station readings
8
12
12
8
CAMS model adj -16
25
25
25
24
25
25
25
24
25
24
25
25
25
25
25
25
25
25
25
25
27
27
27
27
AD 728×90

Air Quality Index Trend

48h · 1 stn

Mercer 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.

55.2%
Humidity
32.9 km/h
Wind SW
1014.8 hPa
Pressure
9.4
UV Very High
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
15
3.62 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Mercer Island?

Temperature & Precipitation

PM2.5 Trend

48h · 1 station
PM2.53.62 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX9.4
Very High
AD 300×250
Station readings (27 stations within 25 km)
3.62
Median
3.3
Average
0.97
Low
7.2
High
PM2.5 µg/m³ · Model: 5.8 · Bias: +2.2

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
6.5 km PM2.5: 0.5 µg/m³
30
SE 12th St, Bellevue, Washington, USA
6.5 km PM2.5: 7.2 µg/m³
57
SE 12th St, Bellevue, Washington, USA
6.5 km PM2.5: 15.0 µg/m³
6
SE 12th St, Bellevue, Washington, USA
6.5 km PM2.5: 1.4 µg/m³
14
Beacon Hill, Seattle, Washington, USA
6.5 km PM2.5: 3.4 µg/m³
9
Seattle-S Myrtle St
6.5 km PM2.5: 2.2 µg/m³
10
Seattle-16th Ave S
6.8 km PM2.5: 2.5 µg/m³
8
Seattle-13th Ave S
7.7 km PM2.5: 1.9 µg/m³
45
10th and Weller, Seattle, Washington, USA
7.9 km PM2.5: 10.8 µg/m³
8
10th and Weller, Seattle, Washington, USA
7.9 km PM2.5: 1.9 µg/m³

What cities are near Mercer Island?

16 Columbia City 14 Bryn Mawr-Skyway 9 West Lake Sammamish 22 Seattle 14 Renton 13 Tukwila 13 Kirkland 12 Sammamish 13 Redmond 10 City of Sammamish
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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 2026-06-08T20:55 UTC.