Hourly Weather | Today Tuesday, July 21, 2026
Danbury, Connecticut
4 AM
Cloudy Night
63°
Feels Like 64°
0
Humidity: 92%
UV Index: 0
Wind: 2 mph
5 AM
Cloudy Night
64°
Feels Like 64°
0
Humidity: 97%
UV Index: 0
Wind: 4 mph
6 AM
Cloudy Weather
64°
Feels Like 66°
0
Humidity: 99%
UV Index: 0
Wind: 5 mph
7 AM
Cloudy Weather
66°
Feels Like 68°
3
Humidity: 96%
UV Index: 1
Wind: 5 mph
8 AM
Cloudy Weather
70°
Feels Like 70°
17
Humidity: 84%
UV Index: 1
Wind: 8 mph
9 AM
Cloudy Weather
73°
Feels Like 73°
17
Humidity: 79%
UV Index: 1
Wind: 9 mph
10 AM
Cloudy Weather
73°
Feels Like 75°
22
Humidity: 77%
UV Index: 1
Wind: 10 mph
11 AM
Cloudy Weather
75°
Feels Like 75°
47
Humidity: 78%
UV Index: 2
Wind: 10 mph
12 PM
Rainy Weather
73°
Feels Like 73°
51
Humidity: 82%
UV Index: 2
Wind: 10 mph
1 PM
Cloudy Weather
73°
Feels Like 79°
44
Humidity: 86%
UV Index: 2
Wind: 10 mph
2 PM
Stormy Weather
73°
Feels Like 72°
68
Humidity: 89%
UV Index: 2
Wind: 9 mph
3 PM
Cloudy Weather
73°
Feels Like 79°
49
Humidity: 88%
UV Index: 2
Wind: 9 mph
4 PM
Cloudy Weather
75°
Feels Like 79°
49
Humidity: 87%
UV Index: 1
Wind: 9 mph
5 PM
Cloudy Weather
75°
Feels Like 81°
49
Humidity: 86%
UV Index: 1
Wind: 8 mph
6 PM
Cloudy Weather
77°
Feels Like 81°
49
Humidity: 85%
UV Index: 1
Wind: 8 mph
7 PM
Stormy Weather
75°
Feels Like 73°
68
Humidity: 90%
UV Index: 0
Wind: 8 mph
8 PM
Cloudy Weather
73°
Feels Like 79°
49
Humidity: 94%
UV Index: 0
Wind: 7 mph
9 PM
Cloudy Weather
73°
Feels Like 79°
49
Humidity: 96%
UV Index: 0
Wind: 7 mph
10 PM
Stormy Weather
73°
Feels Like 73°
66
Humidity: 95%
UV Index: 0
Wind: 6 mph
11 PM
Stormy Weather
73°
Feels Like 72°
62
Humidity: 95%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

4 AM
53 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 10.76 µg/m³
  • PM10: 15.12 µg/m³
  • O3: 0.055 ppm
  • NO2: 0.8 ppb
  • SO2: 0.3 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.

5 AM
49 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 10.46 µg/m³
  • PM10: 14.8 µg/m³
  • O3: 0.053 ppm
  • NO2: 0.8 ppb
  • SO2: 0.3 ppb
  • CO: 0.23 ppm

Health Recommendations:

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

6 AM
48 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 9.89 µg/m³
  • PM10: 14.01 µg/m³
  • O3: 0.052 ppm
  • NO2: 0.9 ppb
  • SO2: 0.3 ppb
  • CO: 0.23 ppm

Health Recommendations:

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

7 AM
48 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 9.15 µg/m³
  • PM10: 13 µg/m³
  • O3: 0.052 ppm
  • NO2: 1.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.25 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.26 µg/m³
  • PM10: 11.92 µg/m³
  • O3: 0.052 ppm
  • NO2: 1.8 ppb
  • SO2: 0.3 ppb
  • CO: 0.27 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7 µg/m³
  • PM10: 10.42 µg/m³
  • O3: 0.054 ppm
  • NO2: 1.6 ppb
  • SO2: 0.3 ppb
  • CO: 0.30 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.82 µg/m³
  • PM10: 8.93 µg/m³
  • O3: 0.053 ppm
  • NO2: 1.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.31 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.04 µg/m³
  • PM10: 7.92 µg/m³
  • O3: 0.051 ppm
  • NO2: 1.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.30 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.83 µg/m³
  • PM10: 7.03 µg/m³
  • O3: 0.048 ppm
  • NO2: 1.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.29 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.93 µg/m³
  • PM10: 6.41 µg/m³
  • O3: 0.043 ppm
  • NO2: 1.6 ppb
  • SO2: 0.2 ppb
  • CO: 0.27 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.14 µg/m³
  • PM10: 6.24 µg/m³
  • O3: 0.039 ppm
  • NO2: 2.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.25 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.21 µg/m³
  • PM10: 6.06 µg/m³
  • O3: 0.034 ppm
  • NO2: 2.5 ppb
  • SO2: 0.3 ppb
  • CO: 0.22 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: 5.1 µg/m³
  • PM10: 5.81 µg/m³
  • O3: 0.030 ppm
  • NO2: 3 ppb
  • SO2: 0.3 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.95 µg/m³
  • PM10: 5.65 µg/m³
  • O3: 0.026 ppm
  • NO2: 3.6 ppb
  • SO2: 0.3 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.88 µg/m³
  • PM10: 5.58 µg/m³
  • O3: 0.023 ppm
  • NO2: 4.2 ppb
  • SO2: 0.4 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.75 µg/m³
  • PM10: 5.27 µg/m³
  • O3: 0.022 ppm
  • NO2: 4.4 ppb
  • SO2: 0.4 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.67 µg/m³
  • PM10: 5.03 µg/m³
  • O3: 0.023 ppm
  • NO2: 4.1 ppb
  • SO2: 0.4 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.52 µg/m³
  • PM10: 4.77 µg/m³
  • O3: 0.024 ppm
  • NO2: 3.6 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.42 µg/m³
  • PM10: 4.62 µg/m³
  • O3: 0.023 ppm
  • NO2: 3.7 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.28 µg/m³
  • PM10: 4.45 µg/m³
  • O3: 0.022 ppm
  • NO2: 4 ppb
  • SO2: 0.4 ppb
  • CO: 0.13 ppm

Health Recommendations:

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