Hourly Weather | Today Saturday, September 19, 2026
Waterbury, Connecticut
10 AM
Cloudy Weather
61°
Feels Like 63°
0
Humidity: 57%
UV Index: 3
Wind: 8 mph
11 AM
Cloudy Weather
63°
Feels Like 66°
0
Humidity: 52%
UV Index: 4
Wind: 8 mph
12 PM
Cloudy Weather
64°
Feels Like 70°
0
Humidity: 49%
UV Index: 5
Wind: 7 mph
1 PM
Cloudy Weather
66°
Feels Like 72°
0
Humidity: 47%
UV Index: 5
Wind: 6 mph
2 PM
Cloudy Weather
66°
Feels Like 73°
0
Humidity: 45%
UV Index: 5
Wind: 6 mph
3 PM
Cloudy Weather
70°
Feels Like 73°
0
Humidity: 43%
UV Index: 4
Wind: 6 mph
4 PM
Cloudy Weather
68°
Feels Like 70°
0
Humidity: 45%
UV Index: 3
Wind: 6 mph
5 PM
Cloudy Weather
66°
Feels Like 66°
0
Humidity: 49%
UV Index: 2
Wind: 6 mph
6 PM
Cloudy Weather
64°
Feels Like 64°
0
Humidity: 55%
UV Index: 1
Wind: 6 mph
7 PM
Cloudy Night
61°
Feels Like 61°
0
Humidity: 65%
UV Index: 0
Wind: 6 mph
8 PM
Cloudy Weather
57°
Feels Like 57°
5
Humidity: 76%
UV Index: 0
Wind: 6 mph
9 PM
Cloudy Weather
55°
Feels Like 55°
5
Humidity: 83%
UV Index: 0
Wind: 5 mph
10 PM
Cloudy Weather
55°
Feels Like 54°
6
Humidity: 86%
UV Index: 0
Wind: 5 mph
11 PM
Cloudy Weather
54°
Feels Like 54°
7
Humidity: 91%
UV Index: 0
Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 2.01 µg/m³
  • PM10: 4.39 µg/m³
  • O3: 0.030 ppm
  • NO2: 3.6 ppb
  • SO2: 1 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.31 µg/m³
  • PM10: 4.81 µg/m³
  • O3: 0.032 ppm
  • NO2: 3.2 ppb
  • SO2: 1 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.69 µg/m³
  • PM10: 5.19 µg/m³
  • O3: 0.035 ppm
  • NO2: 2.8 ppb
  • SO2: 1 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.16 µg/m³
  • PM10: 5.65 µg/m³
  • O3: 0.038 ppm
  • NO2: 2.3 ppb
  • SO2: 0.9 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.59 µg/m³
  • PM10: 6.1 µg/m³
  • O3: 0.040 ppm
  • NO2: 2 ppb
  • SO2: 0.9 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.67 µg/m³
  • PM10: 6.11 µg/m³
  • O3: 0.043 ppm
  • NO2: 1.8 ppb
  • SO2: 0.8 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.54 µg/m³
  • PM10: 5.92 µg/m³
  • O3: 0.044 ppm
  • NO2: 1.7 ppb
  • SO2: 0.7 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.34 µg/m³
  • PM10: 5.69 µg/m³
  • O3: 0.044 ppm
  • NO2: 1.8 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
40 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.11 µg/m³
  • PM10: 5.44 µg/m³
  • O3: 0.043 ppm
  • NO2: 2.1 ppb
  • SO2: 0.7 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.85 µg/m³
  • PM10: 5.27 µg/m³
  • O3: 0.042 ppm
  • NO2: 2.3 ppb
  • SO2: 0.7 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.54 µg/m³
  • PM10: 5.13 µg/m³
  • O3: 0.040 ppm
  • NO2: 2.1 ppb
  • SO2: 0.6 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.19 µg/m³
  • PM10: 5.01 µg/m³
  • O3: 0.039 ppm
  • NO2: 2 ppb
  • SO2: 0.6 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.91 µg/m³
  • PM10: 5.01 µg/m³
  • O3: 0.037 ppm
  • NO2: 2 ppb
  • SO2: 0.6 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.74 µg/m³
  • PM10: 5.01 µg/m³
  • O3: 0.036 ppm
  • NO2: 2.1 ppb
  • SO2: 0.5 ppb
  • CO: 0.18 ppm

Health Recommendations:

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