Air Quality in Mercer Island, United States

Rain
10.2°C · 97.2% humidity
10.2°
Feels 10.2°
12
Good
Air quality is satisfactory. Enjoy outdoor activities.
24 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
7 4am
7
7
12 7am
11
10
9 10am
8
10
10 1pm
16
16
16 4pm
16
36
36 7pm
36
36
36 10pm
36
36
36 1am
36
16
Station readings
8
8
12
12
CAMS model adj -18
25
25
25
25
25
25
25
25
27
27
34
34
34
34
54
54
54
54
54
54
54
54
54
34
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.

97.2%
Humidity
65.2 km/h
Wind SSE
1015.9 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5
12
2.76 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
PM2.52.76 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
Station readings (24 stations within 25 km)
2.76
Median
2.82
Average
0.7
Low
5.8
High
PM2.5 µg/m³ · Model: 6.0 · Bias: +3.2

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: 3.3°C

Where are air quality stations near Mercer Island?

30
SE 12th St, Bellevue, Washington, USA
6.5 km PM2.5: 7.2 µg/m³
4
SE 12th St, Bellevue, Washington, USA
6.5 km PM2.5: 1.0 µg/m³
46
SE 12th St, Bellevue, Washington, USA
6.5 km PM2.5: 11.0 µg/m³
17
SE 12th St, Bellevue, Washington, USA
6.5 km PM2.5: 4.1 µg/m³
28
Beacon Hill, Seattle, Washington, USA
6.5 km PM2.5: 6.7 µg/m³
14
Seattle-S Myrtle St
6.5 km PM2.5: 3.3 µg/m³
13
Seattle-16th Ave S
6.8 km PM2.5: 3.1 µg/m³
13
Seattle-13th Ave S
7.7 km PM2.5: 3.2 µg/m³
34
10th and Weller, Seattle, Washington, USA
7.9 km PM2.5: 8.2 µg/m³
5
10th and Weller, Seattle, Washington, USA
7.9 km PM2.5: 1.2 µg/m³

What cities are near Mercer Island?

14 Columbia City 14 Bryn Mawr-Skyway 7 West Lake Sammamish 13 Seattle 13 Renton 13 Tukwila 11 Kirkland 8 Sammamish 10 Redmond 8 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 2026-05-29T14:28 UTC.