Air Quality in Norwalk, United States

Windy
26.5°C · 32.5% humidity
26.5°
Feels 26.5°
37
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station

Nearby Monitoring Stations

AQI Forecast
34 4pm
34
34
37 7pm
54
54
54 10pm
54
54
54 1am
54
34
34 4am
54
54
34 7am
34
27
27 10am
27
27
34 1pm
34
34
AD 728×90

Air Quality Index Trend

46h · 12 stn

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

32.5%
Humidity
46.6 km/h
Wind WNW
1010.8 hPa
Pressure
1.4
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
37
8.9 µg/m³
PM10
25
27.45 µg/m³
050100150200300500

What is the weather forecast for Norwalk?

Temperature & Precipitation

PM2.5 Trend

46h · 12 stations
PM2.58.9 µg/m³ ✓ WHO
Good
PM1027.45 µg/m³
Good
UV INDEX1.4
Low
AD 300×250
Station readings (1 station within 25 km)
8.9
Median
8.9
Average
8.9
Low
8.9
High
PM2.5 µg/m³ · Model: 17.65 · Bias: +8.8

What is the 7-day forecast for Norwalk?

08-03
26.5° 19.2°
6.94 mm
08-04
36.6° 20.3°
08-05
33.4° 20.3°
0.06 mm
08-06
28.6° 17.3°
08-07
30.4° 20.1°
4.81 mm
08-08
26.1° 20.7°
0.13 mm
08-09
38.1° 21.6°
0.5 mm
Both models agree Avg diff: 3.4°C

Where are air quality stations near Norwalk?

39
Bridgeport, Connecticut, USA
18.8 km PM2.5: 9.4 µg/m³
37
Bridgeport, Connecticut, USA
18.8 km PM2.5: 8.9 µg/m³

What cities are near Norwalk?

37 East Norwalk 37 Westport 54 Darien 63 New Canaan 37 Wilton 54 North Stamford 52 Stamford 37 Bridgeport 37 Trumbull 37 Stratford
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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 2026-08-07T23:56 UTC.