Today | Weather | Tuesday, April 7, 2026

Weather in Norwalk, Connecticut

11:26 AM
Now
Cloudy Weather
54° F
Feels Like 48°
Precipitation 36 %
Wind 18 mph
UV Index (0 - 11+) 4
Humidity 43 %
Today
Cloudy Weather
Day 54°
Night 28°
Precipitation 40 %
Wind 17 mph
UV Index (0 - 11+) 6

Norwalk Weather Forecast Updated

Last updated on

Air Quality in Norwalk

NOW
48 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 1.42 µg/m³
PM10 2.51 µg/m³
O3 0.052 ppm
NO2 2.3 ppb
SO2 0.7 ppb
CO 0.14 ppm
NH3 0.75 µg/m³
NO 1.1 µg/m³
PM2.5 – Fine particles <2.5μm
PM10 – Inhalable particles <10μm
O3 – Ozone
NO2 – Nitrogen dioxide
SO2 – Sulfur dioxide
CO – Carbon monoxide
NH3 – Ammonia
NO – Nitric oxide

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

Show raw pollutant concentrations (µg/m³)
PM2.51.42 µg/m³
PM102.51 µg/m³
O3101.48 µg/m³
NO24.41 µg/m³
SO21.8 µg/m³
CO166.01 µg/m³
NH30.75 µg/m³
NO1.1 µg/m³