Hourly Weather | Today Tuesday, September 1, 2026
Danbury, Connecticut
12 PM
Rainy Weather
73°
Feels Like 79°
67
Humidity: 87%
UV Index: 1
Wind: 6 mph
1 PM
Cloudy Weather
75°
Feels Like 81°
49
Humidity: 84%
UV Index: 2
Wind: 7 mph
2 PM
Cloudy Weather
79°
Feels Like 84°
34
Humidity: 78%
UV Index: 2
Wind: 7 mph
3 PM
Cloudy Weather
75°
Feels Like 81°
34
Humidity: 85%
UV Index: 2
Wind: 7 mph
4 PM
Cloudy Weather
75°
Feels Like 81°
39
Humidity: 90%
UV Index: 1
Wind: 7 mph
5 PM
Cloudy Weather
73°
Feels Like 79°
49
Humidity: 94%
UV Index: 1
Wind: 7 mph
6 PM
Stormy Weather
72°
Feels Like 72°
58
Humidity: 97%
UV Index: 0
Wind: 7 mph
7 PM
Cloudy Weather
72°
Feels Like 73°
49
Humidity: 98%
UV Index: 0
Wind: 6 mph
8 PM
Stormy Weather
72°
Feels Like 72°
66
Humidity: 91%
UV Index: 0
Wind: 7 mph
9 PM
Stormy Weather
70°
Feels Like 70°
57
Humidity: 93%
UV Index: 0
Wind: 6 mph
10 PM
Cloudy Weather
70°
Feels Like 70°
49
Humidity: 91%
UV Index: 0
Wind: 6 mph
11 PM
Cloudy Weather
70°
Feels Like 68°
34
Humidity: 87%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

12 PM
42 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 10.2 µg/m³
  • PM10: 11.48 µg/m³
  • O3: 0.033 ppm
  • NO2: 6.2 ppb
  • SO2: 0.9 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

1 PM
45 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 10.7 µg/m³
  • PM10: 11.78 µg/m³
  • O3: 0.038 ppm
  • NO2: 5.4 ppb
  • SO2: 0.9 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

2 PM
46 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 11.1 µg/m³
  • PM10: 12.08 µg/m³
  • O3: 0.042 ppm
  • NO2: 4.7 ppb
  • SO2: 0.9 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

3 PM
48 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 11.51 µg/m³
  • PM10: 12.44 µg/m³
  • O3: 0.044 ppm
  • NO2: 4.5 ppb
  • SO2: 0.9 ppb
  • CO: 0.16 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: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 12 µg/m³
  • PM10: 12.91 µg/m³
  • O3: 0.044 ppm
  • NO2: 4.9 ppb
  • SO2: 1 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

5 PM
52 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 12.92 µg/m³
  • PM10: 13.88 µg/m³
  • O3: 0.043 ppm
  • NO2: 5.5 ppb
  • SO2: 1 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.

6 PM
55 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 14.24 µg/m³
  • PM10: 15.27 µg/m³
  • O3: 0.042 ppm
  • NO2: 6.5 ppb
  • SO2: 1 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

7 PM
58 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 15.66 µg/m³
  • PM10: 16.74 µg/m³
  • O3: 0.039 ppm
  • NO2: 8 ppb
  • SO2: 1 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

8 PM
61 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 16.99 µg/m³
  • PM10: 18.1 µg/m³
  • O3: 0.036 ppm
  • NO2: 8.9 ppb
  • SO2: 1.1 ppb
  • CO: 0.21 ppm

Health Recommendations:

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

9 PM
62 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 17.82 µg/m³
  • PM10: 19 µg/m³
  • O3: 0.032 ppm
  • NO2: 9.7 ppb
  • SO2: 1.1 ppb
  • CO: 0.22 ppm

Health Recommendations:

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

10 PM
62 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 17.75 µg/m³
  • PM10: 19.24 µg/m³
  • O3: 0.027 ppm
  • NO2: 11 ppb
  • SO2: 1.1 ppb
  • CO: 0.22 ppm

Health Recommendations:

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

11 PM
60 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 16.76 µg/m³
  • PM10: 18.51 µg/m³
  • O3: 0.021 ppm
  • NO2: 13.1 ppb
  • SO2: 1.2 ppb
  • CO: 0.23 ppm

Health Recommendations:

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