Air Quality in Issaquah, United States

Rain
26.4°C · 37.6% humidity
26.4°
Feels 26.4°
11
Good
Air quality is satisfactory. Enjoy outdoor activities.
12 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
15 2pm
15
0
11 5pm
26
23
21 8pm
19
30
29 11pm
29
28
16 2am
16
15
0 5am
0
0
0 8am
0
0
0 11am
0
0
Station readings
8
8
8
8
CAMS model adj -39
54
54
34
34
54
54
54
54
66
66
66
66
54
54
54
34
27
25
25
25
25
25
25
27
AD 728×90

Air Quality Index Trend

48h · 1 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.

37.6%
Humidity
45.2 km/h
Wind SW
1019.0 hPa
Pressure
5.9
UV High
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5
11
2.59 µg/m³
PM10▲
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Issaquah?

Temperature & Precipitation

PM2.5 Trend

48h · 1 station
PM2.52.59 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX5.9
High
AD 300×250
Station readings (12 stations within 25 km)
2.59
Median
4.53
Average
1.47
Low
8.6
High
PM2.5 µg/m³ · Model: 7.1 · Bias: +4.5

What is the 7-day forecast for Issaquah?

05-29
26.4° 9.6°
18.12 mm
05-30
21.4° 8.1°
0.94 mm
05-31
22.9° 9.1°
06-01
19.4° 4.1°
06-02
27.9° 8.4°
06-03
20.1° 6.4°
1.94 mm
06-04
17.9° 10.2°
0.81 mm
Both models agree Avg diff: 3.9°C

Where are air quality stations near Issaquah?

8
Issaquah-Lake Sammamish
3.5 km PM2.5: 1.9 µg/m³
60
SE 12th St, Bellevue, Washington, USA
11.7 km PM2.5: 16.4 µg/m³
67
SE 12th St, Bellevue, Washington, USA
11.7 km PM2.5: 19.7 µg/m³
42
SE 12th St, Bellevue, Washington, USA
11.7 km PM2.5: 10.1 µg/m³
25
SE 12th St, Bellevue, Washington, USA
11.7 km PM2.5: 6.0 µg/m³
26
Tukwilla Allentown, Washington, USA
18.8 km PM2.5: 6.2 µg/m³
30
Tukwilla Allentown, Washington, USA
18.8 km PM2.5: 7.2 µg/m³
37
Tukwilla Allentown, Washington, USA
18.8 km PM2.5: 8.9 µg/m³
8
Seattle-S Myrtle St
19.7 km PM2.5: 1.8 µg/m³
33
North Bend Way, North Bend, Washington, USA
20.0 km PM2.5: 7.9 µg/m³

What cities are near Issaquah?

12 West Lake Sammamish 12 City of Sammamish 13 Sammamish 15 Fairwood 16 Renton 16 Mercer Island 13 Maple Valley 17 Bryn Mawr-Skyway 12 Union Hill-Novelty Hill 14 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 2026-05-29T00:17 UTC.