Air Quality in Seattle, United States

Windy
14.5°C · 55.3% humidity
14.5°
Feels 14.5°
18
Good
Air quality is satisfactory. Enjoy outdoor activities.
28 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
9 2pm
9
9
18 5pm
16
13
13 8pm
12
11
10 11pm
10
10
9 2am
9
9
9 5am
11
11
11 8am
11
11
11 11am
9
9
Station readings
8
8
8
CAMS model adj -16
25
25
25
24
25
24
25
25
25
25
25
25
25
25
25
25
27
27
27
27
27
27
25
25
AD 728×90

Air Quality Index Trend

47h · 1 stn

Seattle'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
5.9
UV High
GoodModerateUSGUnhealthyVery UnhealthyHazardous
PM2.5
18
4.42 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

Temperature & Precipitation

PM2.5 Trend

47h · 1 station
PM2.54.42 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX5.9
High
AD 300×250
4.42
Median
3.24
Average
1.0
Low
6.5
High
PM2.5 µg/m³ · Model: 5.8 · Bias: +1.4
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
06-15
23.7° 8.6°
0.63 mm
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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 2026-06-09T00:18 UTC.