Today | Weather | Tuesday, September 1, 2026

Weather in Norwalk, Connecticut

11:24 AM
Now
Rainy Weather
75° F
Feels Like 77°
Precipitation 66 %
Wind 7 mph
UV Index (0 - 11+) 1
Humidity 90 %
Today
Stormy Weather
Day 79°
Night 64°
Precipitation 100 %
Wind 7 mph
UV Index (0 - 11+) 2

Norwalk Weather Forecast Updated

8 minutes ago
Last updated on

Air Quality in Norwalk

NOW
44 AQI
Good air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 10.68 µg/m³
PM10 12.29 µg/m³
O3 0.029 ppm
NO2 5.3 ppb
SO2 0.9 ppb
CO 0.16 ppm
NH3 0.11 µg/m³
NO 0.86 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)
PM2.510.68 µg/m³
PM1012.29 µg/m³
O356.72 µg/m³
NO210.04 µg/m³
SO22.4 µg/m³
CO182.32 µg/m³
NH30.11 µg/m³
NO0.86 µg/m³