Hourly Weather | Today Monday, April 27, 2026
Norwalk, Connecticut
8 PM
Night
57°
Feels Like 54°
0
Humidity: 60%
UV Index: 0
Wind: 7 mph
9 PM
Night
54°
Feels Like 52°
0
Humidity: 69%
UV Index: 0
Wind: 6 mph
10 PM
Night
52°
Feels Like 50°
0
Humidity: 77%
UV Index: 0
Wind: 5 mph
11 PM
Night
48°
Feels Like 48°
0
Humidity: 85%
UV Index: 0
Wind: 4 mph

Hourly Air Quality Forecast - AQI (US EPA)

8 PM
92 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 13.41 µg/m³
  • PM10: 15.5 µg/m³
  • O3: 0.067 ppm
  • NO2: 3.2 ppb
  • SO2: 0.6 ppb
  • CO: 0.17 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

9 PM
71 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 11.16 µg/m³
  • PM10: 13.07 µg/m³
  • O3: 0.061 ppm
  • NO2: 2.9 ppb
  • SO2: 0.5 ppb
  • CO: 0.17 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

10 PM
53 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 10.03 µg/m³
  • PM10: 12 µg/m³
  • O3: 0.055 ppm
  • NO2: 3.1 ppb
  • SO2: 0.3 ppb
  • CO: 0.17 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

11 PM
46 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 9.19 µg/m³
  • PM10: 11.21 µg/m³
  • O3: 0.050 ppm
  • NO2: 3.4 ppb
  • SO2: 0.3 ppb
  • CO: 0.17 ppm

Health Recommendations:

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