Hourly Weather | Today Wednesday, March 18, 2026
Danbury, Connecticut
8 AM
Cloudy Weather
27°
Feels Like 21°
0
Humidity: 43%
UV Index: 1
Wind: 7 mph
9 AM
Cloudy Weather
27°
Feels Like 27°
0
Humidity: 40%
UV Index: 2
Wind: 7 mph
10 AM
Cloudy Weather
28°
Feels Like 28°
0
Humidity: 38%
UV Index: 2
Wind: 7 mph
11 AM
Cloudy Weather
30°
Feels Like 32°
0
Humidity: 35%
UV Index: 3
Wind: 7 mph
12 PM
Cloudy Weather
32°
Feels Like 37°
0
Humidity: 32%
UV Index: 4
Wind: 6 mph
1 PM
Cloudy Weather
34°
Feels Like 45°
0
Humidity: 30%
UV Index: 5
Wind: 5 mph
2 PM
Cloudy Weather
36°
Feels Like 45°
0
Humidity: 28%
UV Index: 4
Wind: 4 mph
3 PM
Cloudy Weather
36°
Feels Like 39°
0
Humidity: 28%
UV Index: 3
Wind: 6 mph
4 PM
Cloudy Weather
37°
Feels Like 36°
0
Humidity: 27%
UV Index: 2
Wind: 8 mph
5 PM
Cloudy Weather
37°
Feels Like 34°
0
Humidity: 27%
UV Index: 1
Wind: 8 mph
6 PM
Cloudy Weather
37°
Feels Like 32°
0
Humidity: 29%
UV Index: 1
Wind: 8 mph
7 PM
Cloudy Weather
36°
Feels Like 30°
0
Humidity: 32%
UV Index: 0
Wind: 7 mph
8 PM
Cloudy Night
34°
Feels Like 30°
0
Humidity: 36%
UV Index: 0
Wind: 6 mph
9 PM
Cloudy Night
30°
Feels Like 30°
0
Humidity: 42%
UV Index: 0
Wind: 5 mph
10 PM
Cloudy Night
28°
Feels Like 28°
0
Humidity: 47%
UV Index: 0
Wind: 5 mph
11 PM
Cloudy Night
28°
Feels Like 28°
0
Humidity: 52%
UV Index: 0
Wind: 4 mph

Hourly Air Quality Forecast - AQI (US EPA)

8 AM
43 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.65 µg/m³
  • PM10: 3.83 µg/m³
  • O3: 0.047 ppm
  • NO2: 4.7 ppb
  • SO2: 1.1 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

9 AM
44 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.35 µg/m³
  • PM10: 3.34 µg/m³
  • O3: 0.048 ppm
  • NO2: 5.1 ppb
  • SO2: 1 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

10 AM
45 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.31 µg/m³
  • PM10: 3.33 µg/m³
  • O3: 0.049 ppm
  • NO2: 5.6 ppb
  • SO2: 0.9 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

11 AM
45 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.57 µg/m³
  • PM10: 3.74 µg/m³
  • O3: 0.049 ppm
  • NO2: 5.9 ppb
  • SO2: 1 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.08 µg/m³
  • PM10: 4.38 µg/m³
  • O3: 0.049 ppm
  • NO2: 5.9 ppb
  • SO2: 1.1 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.93 µg/m³
  • PM10: 5.36 µg/m³
  • O3: 0.050 ppm
  • NO2: 5.7 ppb
  • SO2: 1.1 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

2 PM
47 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.14 µg/m³
  • PM10: 6.69 µg/m³
  • O3: 0.051 ppm
  • NO2: 5.8 ppb
  • SO2: 1.2 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.31 µg/m³
  • PM10: 7.93 µg/m³
  • O3: 0.053 ppm
  • NO2: 5.8 ppb
  • SO2: 1.2 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.68 µg/m³
  • PM10: 8.16 µg/m³
  • O3: 0.054 ppm
  • NO2: 5.7 ppb
  • SO2: 1.2 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

5 PM
51 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.45 µg/m³
  • PM10: 7.77 µg/m³
  • O3: 0.054 ppm
  • NO2: 5.6 ppb
  • SO2: 1.1 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

6 PM
51 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.26 µg/m³
  • PM10: 7.51 µg/m³
  • O3: 0.054 ppm
  • NO2: 5.7 ppb
  • SO2: 1 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.21 µg/m³
  • PM10: 7.46 µg/m³
  • O3: 0.054 ppm
  • NO2: 5.8 ppb
  • SO2: 0.9 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.17 µg/m³
  • PM10: 7.45 µg/m³
  • O3: 0.054 ppm
  • NO2: 5.3 ppb
  • SO2: 0.8 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

9 PM
49 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.34 µg/m³
  • PM10: 7.68 µg/m³
  • O3: 0.053 ppm
  • NO2: 4.9 ppb
  • SO2: 0.7 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

10 PM
48 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.54 µg/m³
  • PM10: 8.04 µg/m³
  • O3: 0.052 ppm
  • NO2: 4.7 ppb
  • SO2: 0.7 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.77 µg/m³
  • PM10: 8.45 µg/m³
  • O3: 0.051 ppm
  • NO2: 4.7 ppb
  • SO2: 0.6 ppb
  • CO: 0.17 ppm

Health Recommendations:

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