Hourly Weather | Today Wednesday, December 24, 2025
Norwalk, Connecticut
3 PM
Cloudy Weather
41°
Feels Like 32°
7
Humidity: 45%
Wind: 16 mph
UV Index: 1
4 PM
Cloudy Weather
39°
Feels Like 28°
7
Humidity: 51%
Wind: 15 mph
UV Index: 0
5 PM
Cloudy Night
39°
Feels Like 28°
7
Humidity: 52%
Wind: 13 mph
UV Index: 0
6 PM
Cloudy Night
36°
Feels Like 27°
5
Humidity: 55%
Wind: 12 mph
UV Index: 0
7 PM
Cloudy Night
36°
Feels Like 28°
0
Humidity: 56%
Wind: 9 mph
UV Index: 0
8 PM
Cloudy Night
34°
Feels Like 28°
0
Humidity: 60%
Wind: 8 mph
UV Index: 0
9 PM
Cloudy Night
32°
Feels Like 28°
0
Humidity: 64%
Wind: 6 mph
UV Index: 0
10 PM
Cloudy Night
30°
Feels Like 28°
0
Humidity: 67%
Wind: 5 mph
UV Index: 0
11 PM
Cloudy Night
28°
Feels Like 25°
0
Humidity: 73%
Wind: 5 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

3 PM
30 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.19 µg/m³
  • PM10: 2.47 µg/m³
  • O3: 0.032 ppm
  • NO2: 3.7 ppb
  • SO2: 0.5 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

4 PM
28 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.32 µg/m³
  • PM10: 2.79 µg/m³
  • O3: 0.031 ppm
  • NO2: 4.9 ppb
  • SO2: 0.6 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

5 PM
26 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.48 µg/m³
  • PM10: 3.19 µg/m³
  • O3: 0.028 ppm
  • NO2: 6.5 ppb
  • SO2: 0.7 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

6 PM
24 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.81 µg/m³
  • PM10: 3.9 µg/m³
  • O3: 0.026 ppm
  • NO2: 8.2 ppb
  • SO2: 0.8 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

7 PM
22 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.25 µg/m³
  • PM10: 4.75 µg/m³
  • O3: 0.024 ppm
  • NO2: 9.7 ppb
  • SO2: 0.8 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

8 PM
19 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.16 µg/m³
  • PM10: 6.23 µg/m³
  • O3: 0.020 ppm
  • NO2: 11.7 ppb
  • SO2: 0.9 ppb
  • CO: 0.21 ppm

Health Recommendations:

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

9 PM
19 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 4.62 µg/m³
  • PM10: 8.48 µg/m³
  • O3: 0.017 ppm
  • NO2: 14.5 ppb
  • SO2: 1 ppb
  • CO: 0.23 ppm

Health Recommendations:

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

10 PM
26 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 6.22 µg/m³
  • PM10: 10.82 µg/m³
  • O3: 0.015 ppm
  • NO2: 16.9 ppb
  • SO2: 1.1 ppb
  • CO: 0.25 ppm

Health Recommendations:

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

11 PM
31 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 7.54 µg/m³
  • PM10: 12.58 µg/m³
  • O3: 0.012 ppm
  • NO2: 18.3 ppb
  • SO2: 1.1 ppb
  • CO: 0.27 ppm

Health Recommendations:

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