Air Quality in Chicago, United States

Clear
22.4°C · 35.7% humidity
22.4°
Feels 22.4°
76
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
1 station

Nearby Monitoring Stations

AQI Forecast Calibrated
35 7am
67
67
76 10am
61
60
58 1pm
57
57
36 4pm
36
29
28 7pm
55
55
55 10pm
55
55
55 1am
55
55
55 4am
55
55
Station readings
93
60
CAMS model adj +1
34
66
66
66
54
54
54
54
54
34
34
27
27
54
54
54
54
54
54
54
54
54
54
54
AD 728×90

Air Quality Index Trend

12h · 1 stn

Chicago's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration. Current PM2.5 concentration in Chicago is 1.6× the WHO 24-hour guideline of 15 µg/m³.

35.7%
Humidity
27.9 km/h
Wind NW
1019.8 hPa
Pressure
9.4
UV Very High
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
76
24.2 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

What is the weather forecast for Chicago?

Temperature & Precipitation

PM2.5 Trend

12h · 1 station
PM2.524.2 µg/m³ ×1.6 WHO
Moderate
PM1020.55 µg/m³
Good
UV INDEX9.4
Very High
AD 300×250
Station readings (1 station within 25 km)
24.2
Median
24.2
Average
24.2
Low
24.2
High
PM2.5 µg/m³ · Model: 12.85 · Bias: -11.4

What is the 7-day forecast for Chicago?

09-05
22.4° 18.2°
09-06
31.3° 16.0°
0.06 mm
09-07
25.0° 18.6°
2.5 mm
09-08
22.4° 13.8°
22.31 mm
09-09
30.3° 17.5°
0.69 mm
09-10
27.5° 17.0°
0.38 mm
09-11
27.4° 16.1°
0.69 mm
Both models agree Avg diff: 5.6°C

Where are air quality stations near Chicago?

22
Lower West Side 3
0.3 km PM2.5: 5.3 µg/m³
27
Armour Square 1
1.2 km PM2.5: 6.4 µg/m³
24
Bridgeport 1
1.4 km PM2.5: 5.8 µg/m³
28
Lower West Side 2
1.6 km PM2.5: 6.6 µg/m³
24
Near West Side 4
1.7 km PM2.5: 5.8 µg/m³
25
Armour Square 2
1.8 km PM2.5: 6.1 µg/m³
28
Near West Side 4
2.3 km PM2.5: 6.8 µg/m³
27
Near West Side 5
2.3 km PM2.5: 6.4 µg/m³
26
Bridgeport 2
2.5 km PM2.5: 6.2 µg/m³
10
Near South Side 2
2.6 km PM2.5: 2.5 µg/m³

What cities are near Chicago?

76 Bridgeport 76 Lower West Side 76 Near South Side 76 McKinley Park 76 Douglas 76 Chicago Loop 76 New City 76 Grand Boulevard 76 South Lawndale 76 West Town
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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 2026-09-05T15:05 UTC.