Hourly Weather | Today Thursday, February 5, 2026
Norwalk, Connecticut
10 PM
Cloudy Night
19°
Feels Like 12°
0
Humidity: 70%
UV Index: 0
Wind: 7 mph
11 PM
Cloudy Night
18°
Feels Like 10°
0
Frost Risk: 100%
Humidity: 72%
UV Index: 0
Wind: 7 mph

Hourly Air Quality Forecast - AQI (US EPA)

10 PM
104 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 37.04 µg/m³
  • PM10: 44.94 µg/m³
  • O3: 0.011 ppm
  • NO2: 36.6 ppb
  • SO2: 2.2 ppb
  • CO: 0.53 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

11 PM
110 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 39.56 µg/m³
  • PM10: 47.95 µg/m³
  • O3: 0.011 ppm
  • NO2: 36.8 ppb
  • SO2: 2 ppb
  • CO: 0.57 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.