Hourly Weather | Today Monday, September 21, 2026
Bristol, Connecticut
3 PM
Cloudy Weather
66°
Feels Like 70°
0
Humidity: 60%
UV Index: 4
Wind: 9 mph
4 PM
Cloudy Weather
66°
Feels Like 66°
0
Humidity: 59%
UV Index: 2
Wind: 8 mph
5 PM
Cloudy Weather
66°
Feels Like 66°
0
Humidity: 60%
UV Index: 2
Wind: 7 mph
6 PM
Cloudy Weather
64°
Feels Like 64°
0
Humidity: 64%
UV Index: 1
Wind: 7 mph
7 PM
Cloudy Night
63°
Feels Like 63°
0
Humidity: 69%
UV Index: 0
Wind: 6 mph
8 PM
Cloudy Night
61°
Feels Like 59°
0
Humidity: 78%
UV Index: 0
Wind: 6 mph
9 PM
Cloudy Night
57°
Feels Like 57°
0
Humidity: 81%
UV Index: 0
Wind: 6 mph
10 PM
Cloudy Night
57°
Feels Like 55°
0
Humidity: 81%
UV Index: 0
Wind: 6 mph
11 PM
Cloudy Weather
57°
Feels Like 55°
0
Humidity: 80%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 4.16 µg/m³
  • PM10: 6.09 µg/m³
  • O3: 0.043 ppm
  • NO2: 3.1 ppb
  • SO2: 0.9 ppb
  • CO: 0.19 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: 4.19 µg/m³
  • PM10: 6.14 µg/m³
  • O3: 0.044 ppm
  • NO2: 3.2 ppb
  • SO2: 0.9 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.22 µg/m³
  • PM10: 6.24 µg/m³
  • O3: 0.045 ppm
  • NO2: 3.5 ppb
  • SO2: 0.8 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.38 µg/m³
  • PM10: 6.59 µg/m³
  • O3: 0.044 ppm
  • NO2: 4.9 ppb
  • SO2: 1 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.65 µg/m³
  • PM10: 7.24 µg/m³
  • O3: 0.041 ppm
  • NO2: 6.4 ppb
  • SO2: 1.2 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.84 µg/m³
  • PM10: 7.75 µg/m³
  • O3: 0.039 ppm
  • NO2: 6.8 ppb
  • SO2: 1.2 ppb
  • CO: 0.20 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: 4.8 µg/m³
  • PM10: 7.89 µg/m³
  • O3: 0.038 ppm
  • NO2: 6.5 ppb
  • SO2: 1.2 ppb
  • CO: 0.20 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: 4.58 µg/m³
  • PM10: 7.66 µg/m³
  • O3: 0.037 ppm
  • NO2: 6.1 ppb
  • SO2: 1.1 ppb
  • CO: 0.20 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: 4.15 µg/m³
  • PM10: 7.05 µg/m³
  • O3: 0.036 ppm
  • NO2: 5.7 ppb
  • SO2: 1 ppb
  • CO: 0.19 ppm

Health Recommendations:

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