Air Quality in Issaquah, United States

Partly Cloudy
21.2°C · 53.9% humidity
21.2°
Feels 21.2°
20
Good
Air quality is satisfactory. Enjoy outdoor activities.
18 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
29 7am
40
44
20 10am
23
24
26 1pm
27
7
8 4pm
1
1
2 7pm
9
29
29 10pm
29
41
41 1am
58
58
58 4am
59
58
Station readings
29
40
44
17
CAMS model adj -25
54
54
54
54
54
54
54
54
34
34
27
27
27
34
54
54
54
66
66
83
83
83
84
83
AD 728×90

Air Quality Index Trend

48h · 17 stn

Issaquah's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.

53.9%
Humidity
25.1 km/h
Wind NNW
1019.0 hPa
Pressure
5.9
UV High
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
20
4.84 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

What is the weather forecast for Issaquah?

Temperature & Precipitation

PM2.5 Trend

48h · 17 stations
PM2.54.84 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX5.9
High
AD 300×250
Station readings (18 stations within 25 km)
4.84
Median
4.86
Average
2.4
Low
12.6
High
PM2.5 µg/m³ · Model: 9.65 · Bias: +4.8

What is the 7-day forecast for Issaquah?

09-05
23.7° 9.3°
09-06
25.0° 11.6°
09-07
21.9° 9.4°
1.94 mm
09-08
28.0° 9.8°
2.63 mm
09-09
25.9° 12.5°
0.94 mm
09-10
28.8° 11.8°
09-11
24.7° 8.3°
Both models agree Avg diff: 4.2°C

Where are air quality stations near Issaquah?

16
Issaquah-Lake Sammamish
3.5 km PM2.5: 3.9 µg/m³
14
SE 12th St, Bellevue, Washington, USA
11.7 km PM2.5: 3.4 µg/m³
15
SE 12th St, Bellevue, Washington, USA
11.7 km PM2.5: 3.6 µg/m³
52
SE 12th St, Bellevue, Washington, USA
11.7 km PM2.5: 12.6 µg/m³
17
Tukwilla Allentown, Washington, USA
18.8 km PM2.5: 4.1 µg/m³
15
Seattle-S Myrtle St
19.7 km PM2.5: 3.7 µg/m³
19
North Bend Way, North Bend, Washington, USA
20.0 km PM2.5: 4.6 µg/m³
17
North Bend Way, North Bend, Washington, USA
20.0 km PM2.5: 4.1 µg/m³
21
North Bend Way, North Bend, Washington, USA
20.0 km PM2.5: 5.0 µg/m³
19
Beacon Hill, Seattle, Washington, USA
21.1 km PM2.5: 4.6 µg/m³

What cities are near Issaquah?

25 West Lake Sammamish 24 City of Sammamish 26 Sammamish 18 Fairwood 19 Renton 21 Mercer Island 19 Maple Valley 18 Bryn Mawr-Skyway 26 Union Hill-Novelty Hill 17 East Hill-Meridian
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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 2026-09-05T17:14 UTC.