Hourly Weather | Today Wednesday, March 18, 2026
Waterbury, Connecticut
1 PM
Cloudy Weather
34°
Feels Like 43°
0
Humidity: 32%
UV Index: 5
Wind: 5 mph
2 PM
Cloudy Weather
36°
Feels Like 48°
0
Humidity: 30%
UV Index: 4
Wind: 4 mph
3 PM
Cloudy Weather
36°
Feels Like 41°
0
Humidity: 29%
UV Index: 4
Wind: 6 mph
4 PM
Cloudy Weather
36°
Feels Like 34°
0
Humidity: 31%
UV Index: 3
Wind: 9 mph
5 PM
Cloudy Weather
36°
Feels Like 30°
0
Humidity: 32%
UV Index: 2
Wind: 9 mph
6 PM
Cloudy Weather
34°
Feels Like 28°
0
Humidity: 36%
UV Index: 1
Wind: 8 mph
7 PM
Cloudy Weather
32°
Feels Like 27°
0
Humidity: 41%
UV Index: 0
Wind: 8 mph
8 PM
Night
32°
Feels Like 28°
0
Humidity: 40%
UV Index: 0
Wind: 6 mph
9 PM
Cloudy Night
30°
Feels Like 27°
0
Humidity: 46%
UV Index: 0
Wind: 6 mph
10 PM
Cloudy Night
28°
Feels Like 27°
0
Humidity: 53%
UV Index: 0
Wind: 5 mph
11 PM
Cloudy Night
27°
Feels Like 27°
0
Humidity: 57%
UV Index: 0
Wind: 4 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 5.37 µg/m³
  • PM10: 8.12 µg/m³
  • O3: 0.047 ppm
  • NO2: 7.9 ppb
  • SO2: 2.1 ppb
  • CO: 0.19 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: O3
Details

Pollutant Concentrations:

  • PM2.5: 7.24 µg/m³
  • PM10: 10.11 µg/m³
  • O3: 0.049 ppm
  • NO2: 7.5 ppb
  • SO2: 2.1 ppb
  • CO: 0.19 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: O3
Details

Pollutant Concentrations:

  • PM2.5: 9.01 µg/m³
  • PM10: 11.98 µg/m³
  • O3: 0.052 ppm
  • NO2: 7.2 ppb
  • SO2: 2 ppb
  • CO: 0.19 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: O3
Details

Pollutant Concentrations:

  • PM2.5: 10.03 µg/m³
  • PM10: 13.02 µg/m³
  • O3: 0.054 ppm
  • NO2: 7.1 ppb
  • SO2: 1.9 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

5 PM
53 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 10.13 µg/m³
  • PM10: 13.01 µg/m³
  • O3: 0.055 ppm
  • NO2: 7.2 ppb
  • SO2: 1.8 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.

6 PM
52 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 9.76 µg/m³
  • PM10: 12.65 µg/m³
  • O3: 0.054 ppm
  • NO2: 8.5 ppb
  • SO2: 1.8 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.

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

Pollutant Concentrations:

  • PM2.5: 9.22 µg/m³
  • PM10: 12.3 µg/m³
  • O3: 0.052 ppm
  • NO2: 10.8 ppb
  • SO2: 1.9 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.71 µg/m³
  • PM10: 12.06 µg/m³
  • O3: 0.050 ppm
  • NO2: 11.1 ppb
  • SO2: 1.8 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.42 µg/m³
  • PM10: 12.13 µg/m³
  • O3: 0.049 ppm
  • NO2: 10.6 ppb
  • SO2: 1.7 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.31 µg/m³
  • PM10: 12.35 µg/m³
  • O3: 0.047 ppm
  • NO2: 10.5 ppb
  • SO2: 1.6 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.34 µg/m³
  • PM10: 12.6 µg/m³
  • O3: 0.046 ppm
  • NO2: 10.6 ppb
  • SO2: 1.6 ppb
  • CO: 0.20 ppm

Health Recommendations:

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