Hourly Weather | Today Thursday, December 4, 2025
Waterbury, Connecticut
6 AM
Cloudy Night
28°
Feels Like 27°
0
Humidity: 77%
Wind: 6 mph
UV Index: 0
7 AM
Cloudy Night
30°
Feels Like 19°
7
Humidity: 73%
Wind: 12 mph
UV Index: 0
8 AM
Cloudy Weather
30°
Feels Like 19°
7
Humidity: 75%
Wind: 12 mph
UV Index: 0
9 AM
Cloudy Weather
34°
Feels Like 21°
7
Humidity: 71%
Wind: 13 mph
UV Index: 1
10 AM
Cloudy Weather
36°
Feels Like 25°
7
Humidity: 65%
Wind: 14 mph
UV Index: 1
11 AM
Cloudy Weather
37°
Feels Like 27°
7
Humidity: 62%
Wind: 15 mph
UV Index: 1
12 PM
Cloudy Weather
37°
Feels Like 27°
10
Humidity: 58%
Wind: 15 mph
UV Index: 1
1 PM
Snowy Weather
39°
Feels Like 25°
44
Humidity: 56%
Wind: 17 mph
UV Index: 1
2 PM
Cloudy Weather
37°
Feels Like 25°
40
Humidity: 53%
Wind: 18 mph
UV Index: 1
3 PM
Cloudy Weather
37°
Feels Like 25°
31
Humidity: 48%
Wind: 20 mph
UV Index: 1
4 PM
Cloudy Weather
34°
Feels Like 18°
19
Humidity: 48%
Wind: 21 mph
UV Index: 0
5 PM
Cloudy Night
30°
Feels Like 16°
19
Humidity: 49%
Wind: 18 mph
UV Index: 0
6 PM
Cloudy Night
28°
Feels Like 12°
13
Humidity: 51%
Wind: 17 mph
UV Index: 0
7 PM
Cloudy Night
25°
Feels Like 10°
0
Humidity: 52%
Wind: 15 mph
UV Index: 0
8 PM
Night
25°
Feels Like
0
Humidity: 53%
Wind: 15 mph
UV Index: 0
9 PM
Night
21°
Feels Like
0
Humidity: 54%
Wind: 15 mph
UV Index: 0
10 PM
Night
21°
Feels Like
0
Humidity: 52%
Wind: 15 mph
UV Index: 0
11 PM
Night
19°
Feels Like
0
Humidity: 49%
Wind: 14 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

6 AM
56 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 14.86 µg/m³
  • PM10: 19.1 µg/m³
  • O3: 0.020 ppm
  • NO2: 12.9 ppb
  • SO2: 3.6 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.

7 AM
56 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 14.84 µg/m³
  • PM10: 19.31 µg/m³
  • O3: 0.020 ppm
  • NO2: 13.9 ppb
  • SO2: 3.7 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.

8 AM
56 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 14.73 µg/m³
  • PM10: 19.49 µg/m³
  • O3: 0.021 ppm
  • NO2: 15.5 ppb
  • SO2: 3.8 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
55 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 14.19 µg/m³
  • PM10: 19.04 µg/m³
  • O3: 0.023 ppm
  • NO2: 16.1 ppb
  • SO2: 3.9 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.

10 AM
53 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 13.42 µg/m³
  • PM10: 18.13 µg/m³
  • O3: 0.025 ppm
  • NO2: 15.7 ppb
  • SO2: 3.7 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.

11 AM
50 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 11.98 µg/m³
  • PM10: 16.04 µg/m³
  • O3: 0.028 ppm
  • NO2: 14.1 ppb
  • SO2: 3.4 ppb
  • CO: 0.22 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 10.42 µg/m³
  • PM10: 13.84 µg/m³
  • O3: 0.030 ppm
  • NO2: 12.7 ppb
  • SO2: 3.1 ppb
  • CO: 0.21 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.11 µg/m³
  • PM10: 12.13 µg/m³
  • O3: 0.029 ppm
  • NO2: 11.9 ppb
  • SO2: 2.8 ppb
  • CO: 0.21 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.21 µg/m³
  • PM10: 9.81 µg/m³
  • O3: 0.029 ppm
  • NO2: 10.6 ppb
  • SO2: 2.4 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.08 µg/m³
  • PM10: 7.16 µg/m³
  • O3: 0.028 ppm
  • NO2: 9.9 ppb
  • SO2: 2 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.54 µg/m³
  • PM10: 5.12 µg/m³
  • O3: 0.027 ppm
  • NO2: 9.5 ppb
  • SO2: 1.5 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.35 µg/m³
  • PM10: 3.56 µg/m³
  • O3: 0.029 ppm
  • NO2: 8.1 ppb
  • SO2: 1.1 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.42 µg/m³
  • PM10: 2.49 µg/m³
  • O3: 0.033 ppm
  • NO2: 6.6 ppb
  • SO2: 0.8 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.99 µg/m³
  • PM10: 2.06 µg/m³
  • O3: 0.036 ppm
  • NO2: 5.8 ppb
  • SO2: 0.6 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.94 µg/m³
  • PM10: 2.01 µg/m³
  • O3: 0.038 ppm
  • NO2: 5.3 ppb
  • SO2: 0.6 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.96 µg/m³
  • PM10: 2.07 µg/m³
  • O3: 0.038 ppm
  • NO2: 5.1 ppb
  • SO2: 0.6 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1 µg/m³
  • PM10: 2.14 µg/m³
  • O3: 0.038 ppm
  • NO2: 5.1 ppb
  • SO2: 0.6 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.96 µg/m³
  • PM10: 2.07 µg/m³
  • O3: 0.037 ppm
  • NO2: 4.8 ppb
  • SO2: 0.6 ppb
  • CO: 0.13 ppm

Health Recommendations:

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