Air Quality in Seattle, United States

Clear
22.3°C · 41.6% humidity
22.3°
Feels 22.3°
38
Good
Air quality is satisfactory. Enjoy outdoor activities.
24 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
53 7am
53
49
38 10am
41
44
46 1pm
47
48
48 4pm
49
29
29 7pm
30
50
50 10pm
50
50
50 1am
50
30
30 4am
23
50
Station readings
53
53
49
39
CAMS model adj -4
54
54
54
54
54
54
54
54
54
54
54
34
34
34
54
54
54
54
54
54
34
34
27
54
AD 728×90

Air Quality Index Trend

48h · 12 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.

41.6%
Humidity
8.0 km/h
Wind NNE
1015.5 hPa
Pressure
6.9
UV High
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
38
9.11 µg/m³
PM10
25
27.4 µg/m³
050100150200300500

What is the weather forecast for Seattle?

Temperature & Precipitation

PM2.5 Trend

48h · 12 stations
PM2.59.11 µg/m³ ✓ WHO
Good
PM1027.4 µg/m³
Good
UV INDEX6.9
High
AD 300×250
Station readings (24 stations within 25 km)
9.11
Median
11.57
Average
7.0
Low
27.3
High
PM2.5 µg/m³ · Model: 10.85 · Bias: +1.7

What is the 7-day forecast for Seattle?

07-21
28.8° 10.2°
07-22
25.0° 11.1°
07-23
29.5° 12.6°
07-24
28.5° 10.8°
07-25
25.4° 10.5°
07-26
29.5° 9.2°
07-27
26.4° 11.9°
Both models agree Avg diff: 4.3°C

Where are air quality stations near Seattle?

50
10th and Weller, Seattle, Washington, USA
1.4 km PM2.5: 12.0 µg/m³
53
10th and Weller, Seattle, Washington, USA
1.4 km PM2.5: 13.1 µg/m³
38
10th and Weller, Seattle, Washington, USA
1.4 km PM2.5: 9.1 µg/m³
243
Olive St, Seattle, Washington, USA
2.4 km PM2.5: 192.9 µg/m³
39
Seattle-16th Ave S
3.2 km PM2.5: 9.4 µg/m³
42
Belvidere
4.5 km 36.6°C 27.2% RH PM2.5: 10.1 µg/m³ PM10: 10.9 µg/m³
34
Seattle-23rd Ave SW
4.5 km PM2.5: 8.1 µg/m³
21
Beacon Hill, Seattle, Washington, USA
4.6 km PM2.5: 5.0 µg/m³
57
Duwamish, Seattle, Washington, USA
5.2 km PM2.5: 15.0 µg/m³
35
Duwamish, Seattle, Washington, USA
5.2 km PM2.5: 8.4 µg/m³

What cities are near Seattle?

44 Columbia City 50 Mercer Island 48 Kirkland 52 Bryn Mawr-Skyway 46 Bainbridge Island 44 Inglewood-Finn Hill 48 Burien 52 Tukwila 51 Renton 43 Shoreline
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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 2026-07-21T17:11 UTC.