Air Quality in Norwalk, United States
Rain
17.0°C · 95.6% humidity
17.0°
Feels 17.0°
54
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
1 station
Nearby Monitoring Stations
Norwalk's air quality — share it
AQI Forecast
54
10am
54
54
54
1pm
54
54
54
4pm
34
34
34
7pm
27
34
34
10pm
34
27
27
1am
25
27
25
4am
25
25
25
7am
25
25
Air Quality Index Trend
48h · 1 stnNorwalk's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.
95.6%
Humidity
89.1 km/h
Wind NNE
1012.4 hPa
Pressure
19.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
13.5 µg/m³
PM10
41.15 µg/m³
050100150200300500
What is the weather forecast for Norwalk?
Temperature & Precipitation
PM2.5 Trend
48h · 1 stationPM2.513.5 µg/m³
✓ WHO
Moderate
PM1041.15 µg/m³
Good
UV INDEX19.9
Extreme
Station readings (1 station within 25 km)
13.5
Median
13.5
Average
13.5
Low
13.5
High
PM2.5 µg/m³ · Model: 20.3 · Bias: +6.8
What is the 7-day forecast for Norwalk?
07-21
25.1° 17.0°
9.0 mm
07-22
21.8° 14.7°
24.31 mm
07-23
28.1° 15.9°
8.31 mm
07-24
24.4° 15.0°
5.81 mm
07-25
32.7° 20.0°
5.25 mm
07-26
22.1° 17.3°
3.75 mm
07-27
27.0° 20.2°
1.25 mm
Both models agree
Avg diff: 3.2°C
Where are air quality stations near Norwalk?
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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 2026-07-21T17:12 UTC.