Hourly Weather | Today Tuesday, July 21, 2026
Waterbury, Connecticut
6 AM
Cloudy Weather
63°
Feels Like 63°
0
Humidity: 97%
UV Index: 0
Wind: 6 mph
7 AM
Cloudy Weather
64°
Feels Like 64°
1
Humidity: 100%
UV Index: 1
Wind: 7 mph
8 AM
Cloudy Weather
66°
Feels Like 68°
12
Humidity: 93%
UV Index: 1
Wind: 7 mph
9 AM
Cloudy Weather
72°
Feels Like 72°
12
Humidity: 87%
UV Index: 1
Wind: 8 mph
10 AM
Cloudy Weather
73°
Feels Like 75°
16
Humidity: 81%
UV Index: 1
Wind: 9 mph
11 AM
Cloudy Weather
75°
Feels Like 77°
49
Humidity: 76%
UV Index: 2
Wind: 9 mph
12 PM
Rainy Weather
75°
Feels Like 75°
55
Humidity: 78%
UV Index: 2
Wind: 9 mph
1 PM
Rainy Weather
77°
Feels Like 79°
55
Humidity: 78%
UV Index: 2
Wind: 9 mph
2 PM
Cloudy Weather
75°
Feels Like 81°
40
Humidity: 86%
UV Index: 2
Wind: 9 mph
3 PM
Cloudy Weather
75°
Feels Like 81°
34
Humidity: 87%
UV Index: 2
Wind: 8 mph
4 PM
Cloudy Weather
75°
Feels Like 81°
40
Humidity: 91%
UV Index: 1
Wind: 8 mph
5 PM
Stormy Weather
73°
Feels Like 75°
71
Humidity: 95%
UV Index: 1
Wind: 7 mph
6 PM
Stormy Weather
73°
Feels Like 75°
71
Humidity: 96%
UV Index: 0
Wind: 7 mph
7 PM
Cloudy Weather
73°
Feels Like 79°
49
Humidity: 97%
UV Index: 0
Wind: 7 mph
8 PM
Cloudy Weather
73°
Feels Like 77°
49
Humidity: 98%
UV Index: 0
Wind: 7 mph
9 PM
Cloudy Weather
72°
Feels Like 75°
49
Humidity: 97%
UV Index: 0
Wind: 6 mph
10 PM
Stormy Weather
72°
Feels Like 70°
61
Humidity: 99%
UV Index: 0
Wind: 7 mph
11 PM
Stormy Weather
72°
Feels Like 70°
66
Humidity: 98%
UV Index: 0
Wind: 7 mph

Hourly Air Quality Forecast - AQI (US EPA)

6 AM
70 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 8.97 µg/m³
  • PM10: 13.54 µg/m³
  • O3: 0.061 ppm
  • NO2: 2.3 ppb
  • SO2: 0.8 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.

7 AM
67 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 8.49 µg/m³
  • PM10: 12.76 µg/m³
  • O3: 0.059 ppm
  • NO2: 2.7 ppb
  • SO2: 0.8 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.

8 AM
63 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 7.89 µg/m³
  • PM10: 12.11 µg/m³
  • O3: 0.058 ppm
  • NO2: 3 ppb
  • SO2: 0.8 ppb
  • CO: 0.24 ppm

Health Recommendations:

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

9 AM
60 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 7.07 µg/m³
  • PM10: 11.19 µg/m³
  • O3: 0.057 ppm
  • NO2: 2.6 ppb
  • SO2: 0.6 ppb
  • CO: 0.26 ppm

Health Recommendations:

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

10 AM
56 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 6.21 µg/m³
  • PM10: 10.31 µg/m³
  • O3: 0.056 ppm
  • NO2: 2.2 ppb
  • SO2: 0.6 ppb
  • CO: 0.27 ppm

Health Recommendations:

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

11 AM
51 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.41 µg/m³
  • PM10: 9.56 µg/m³
  • O3: 0.054 ppm
  • NO2: 1.8 ppb
  • SO2: 0.5 ppb
  • CO: 0.28 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.99 µg/m³
  • PM10: 8.3 µg/m³
  • O3: 0.053 ppm
  • NO2: 1.5 ppb
  • SO2: 0.4 ppb
  • CO: 0.29 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.02 µg/m³
  • PM10: 7.31 µg/m³
  • O3: 0.051 ppm
  • NO2: 1.6 ppb
  • SO2: 0.4 ppb
  • CO: 0.28 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.28 µg/m³
  • PM10: 6.97 µg/m³
  • O3: 0.048 ppm
  • NO2: 1.7 ppb
  • SO2: 0.4 ppb
  • CO: 0.25 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.57 µg/m³
  • PM10: 6.96 µg/m³
  • O3: 0.044 ppm
  • NO2: 2.2 ppb
  • SO2: 0.5 ppb
  • CO: 0.23 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.65 µg/m³
  • PM10: 6.92 µg/m³
  • O3: 0.039 ppm
  • NO2: 2.7 ppb
  • SO2: 0.5 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.54 µg/m³
  • PM10: 6.88 µg/m³
  • O3: 0.034 ppm
  • NO2: 3.3 ppb
  • SO2: 0.6 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.33 µg/m³
  • PM10: 6.71 µg/m³
  • O3: 0.030 ppm
  • NO2: 3.9 ppb
  • SO2: 0.6 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.01 µg/m³
  • PM10: 6.08 µg/m³
  • O3: 0.027 ppm
  • NO2: 4.3 ppb
  • SO2: 0.6 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.79 µg/m³
  • PM10: 5.57 µg/m³
  • O3: 0.026 ppm
  • NO2: 4.3 ppb
  • SO2: 0.6 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.64 µg/m³
  • PM10: 5.19 µg/m³
  • O3: 0.026 ppm
  • NO2: 4.2 ppb
  • SO2: 0.5 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.51 µg/m³
  • PM10: 4.96 µg/m³
  • O3: 0.026 ppm
  • NO2: 4.1 ppb
  • SO2: 0.5 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.33 µg/m³
  • PM10: 4.7 µg/m³
  • O3: 0.026 ppm
  • NO2: 4.2 ppb
  • SO2: 0.5 ppb
  • CO: 0.12 ppm

Health Recommendations:

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