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
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.

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
16
3.92 µg/m³
PM10▲
19
20.55 µg/m³
050100150200300500

What is the weather forecast for Mercer Island?

Temperature & Precipitation

PM2.5 Trend

48h · 1 station
PM2.53.92 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX5.9
High
AD 300×250
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
6.5 km PM2.5: 19.7 µg/m³
60
SE 12th St, Bellevue, Washington, USA
6.5 km PM2.5: 16.4 µg/m³
42
SE 12th St, Bellevue, Washington, USA
6.5 km PM2.5: 10.1 µg/m³
25
SE 12th St, Bellevue, Washington, USA
6.5 km PM2.5: 6.0 µg/m³
25
Beacon Hill, Seattle, Washington, USA
6.5 km PM2.5: 6.0 µg/m³
8
Seattle-S Myrtle St
6.5 km PM2.5: 1.8 µg/m³
8
Seattle-16th Ave S
6.8 km PM2.5: 2.0 µg/m³
13
Seattle-13th Ave S
7.7 km PM2.5: 3.2 µg/m³
25
10th and Weller, Seattle, Washington, USA
7.9 km PM2.5: 6.0 µg/m³
26
10th and Weller, Seattle, Washington, USA
7.9 km PM2.5: 6.2 µg/m³

What cities are near Mercer Island?

19 Columbia City 17 Bryn Mawr-Skyway 12 West Lake Sammamish 20 Seattle 16 Renton 16 Tukwila 12 Kirkland 13 Sammamish 13 Redmond 12 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 2026-05-29T00:26 UTC.