Hourly Weather | Today Tuesday, September 1, 2026
Bristol, Connecticut
12 PM
Cloudy Weather
73°
Feels Like 77°
49
Humidity: 86%
UV Index: 2
Wind: 6 mph
1 PM
Stormy Weather
73°
Feels Like 73°
74
Humidity: 87%
UV Index: 1
Wind: 7 mph
2 PM
Cloudy Weather
75°
Feels Like 81°
40
Humidity: 85%
UV Index: 2
Wind: 7 mph
3 PM
Cloudy Weather
73°
Feels Like 79°
34
Humidity: 87%
UV Index: 1
Wind: 8 mph
4 PM
Cloudy Weather
73°
Feels Like 75°
40
Humidity: 89%
UV Index: 1
Wind: 9 mph
5 PM
Stormy Weather
72°
Feels Like 70°
71
Humidity: 91%
UV Index: 1
Wind: 9 mph
6 PM
Cloudy Weather
72°
Feels Like 72°
49
Humidity: 93%
UV Index: 0
Wind: 9 mph
7 PM
Stormy Weather
70°
Feels Like 66°
71
Humidity: 96%
UV Index: 0
Wind: 8 mph
8 PM
Stormy Weather
70°
Feels Like 66°
61
Humidity: 93%
UV Index: 0
Wind: 7 mph
9 PM
Cloudy Weather
66°
Feels Like 66°
49
Humidity: 97%
UV Index: 0
Wind: 7 mph
10 PM
Cloudy Weather
66°
Feels Like 66°
49
Humidity: 96%
UV Index: 0
Wind: 7 mph
11 PM
Cloudy Weather
64°
Feels Like 64°
49
Humidity: 97%
UV Index: 0
Wind: 7 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 10.74 µg/m³
  • PM10: 13.18 µg/m³
  • O3: 0.026 ppm
  • NO2: 11.6 ppb
  • SO2: 1.8 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 10.99 µg/m³
  • PM10: 13.08 µg/m³
  • O3: 0.030 ppm
  • NO2: 10.7 ppb
  • SO2: 1.7 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: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 11.13 µg/m³
  • PM10: 13 µg/m³
  • O3: 0.034 ppm
  • NO2: 9.9 ppb
  • SO2: 1.5 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

3 PM
47 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 11.27 µg/m³
  • PM10: 13.11 µg/m³
  • O3: 0.036 ppm
  • NO2: 9.8 ppb
  • SO2: 1.6 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: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 12.05 µg/m³
  • PM10: 14.07 µg/m³
  • O3: 0.037 ppm
  • NO2: 10.9 ppb
  • SO2: 1.7 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

5 PM
52 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 12.78 µg/m³
  • PM10: 14.99 µg/m³
  • O3: 0.036 ppm
  • NO2: 12.6 ppb
  • SO2: 1.9 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.

6 PM
53 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 13.32 µg/m³
  • PM10: 15.84 µg/m³
  • O3: 0.033 ppm
  • NO2: 15.5 ppb
  • SO2: 2 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.

7 PM
54 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 13.71 µg/m³
  • PM10: 16.7 µg/m³
  • O3: 0.027 ppm
  • NO2: 19.1 ppb
  • SO2: 2 ppb
  • CO: 0.25 ppm

Health Recommendations:

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

8 PM
54 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 13.84 µg/m³
  • PM10: 17.11 µg/m³
  • O3: 0.022 ppm
  • NO2: 21.3 ppb
  • SO2: 2 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.

9 PM
54 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 13.85 µg/m³
  • PM10: 17.18 µg/m³
  • O3: 0.018 ppm
  • NO2: 21.8 ppb
  • SO2: 1.8 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.

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

Pollutant Concentrations:

  • PM2.5: 13.43 µg/m³
  • PM10: 16.74 µg/m³
  • O3: 0.016 ppm
  • NO2: 21 ppb
  • SO2: 1.7 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 PM
49 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 11.73 µg/m³
  • PM10: 14.67 µg/m³
  • O3: 0.015 ppm
  • NO2: 18.3 ppb
  • SO2: 1.6 ppb
  • CO: 0.25 ppm

Health Recommendations:

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