Hourly Weather | Today Wednesday, March 18, 2026
Bristol, Connecticut
8 AM
Cloudy Weather
23°
Feels Like 19°
0
Humidity: 50%
UV Index: 1
Wind: 7 mph
9 AM
Cloudy Weather
27°
Feels Like 25°
0
Humidity: 44%
UV Index: 2
Wind: 7 mph
10 AM
Cloudy Weather
28°
Feels Like 28°
0
Humidity: 40%
UV Index: 3
Wind: 7 mph
11 AM
Cloudy Weather
30°
Feels Like 30°
0
Humidity: 36%
UV Index: 4
Wind: 7 mph
12 PM
Cloudy Weather
32°
Feels Like 37°
0
Humidity: 33%
UV Index: 4
Wind: 7 mph
1 PM
Cloudy Weather
34°
Feels Like 45°
0
Humidity: 30%
UV Index: 5
Wind: 5 mph
2 PM
Cloudy Weather
36°
Feels Like 48°
0
Humidity: 28%
UV Index: 4
Wind: 4 mph
3 PM
Cloudy Weather
37°
Feels Like 43°
0
Humidity: 28%
UV Index: 4
Wind: 6 mph
4 PM
Cloudy Weather
37°
Feels Like 37°
0
Humidity: 28%
UV Index: 3
Wind: 8 mph
5 PM
Cloudy Weather
37°
Feels Like 34°
0
Humidity: 30%
UV Index: 2
Wind: 8 mph
6 PM
Cloudy Weather
36°
Feels Like 30°
0
Humidity: 33%
UV Index: 1
Wind: 8 mph
7 PM
Cloudy Weather
34°
Feels Like 27°
0
Humidity: 39%
UV Index: 0
Wind: 8 mph
8 PM
Cloudy Night
30°
Feels Like 27°
0
Humidity: 44%
UV Index: 0
Wind: 7 mph
9 PM
Cloudy Night
28°
Feels Like 25°
0
Humidity: 52%
UV Index: 0
Wind: 6 mph
10 PM
Cloudy Night
27°
Feels Like 23°
0
Humidity: 58%
UV Index: 0
Wind: 6 mph
11 PM
Cloudy Night
25°
Feels Like 23°
0
Humidity: 62%
UV Index: 0
Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

8 AM
43 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.38 µg/m³
  • PM10: 3.36 µg/m³
  • O3: 0.047 ppm
  • NO2: 5.2 ppb
  • SO2: 1.2 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

9 AM
43 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.75 µg/m³
  • PM10: 4.07 µg/m³
  • O3: 0.046 ppm
  • NO2: 6.6 ppb
  • SO2: 1.3 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

10 AM
42 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.14 µg/m³
  • PM10: 4.72 µg/m³
  • O3: 0.046 ppm
  • NO2: 7.1 ppb
  • SO2: 1.4 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.61 µg/m³
  • PM10: 5.35 µg/m³
  • O3: 0.046 ppm
  • NO2: 7 ppb
  • SO2: 1.5 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.3 µg/m³
  • PM10: 6.07 µg/m³
  • O3: 0.047 ppm
  • NO2: 6.8 ppb
  • SO2: 1.7 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.4 µg/m³
  • PM10: 7.26 µg/m³
  • O3: 0.049 ppm
  • NO2: 6.6 ppb
  • SO2: 1.8 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.88 µg/m³
  • PM10: 8.84 µg/m³
  • O3: 0.051 ppm
  • NO2: 6.5 ppb
  • SO2: 1.8 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.67 µg/m³
  • PM10: 10.82 µg/m³
  • O3: 0.053 ppm
  • NO2: 6.8 ppb
  • SO2: 1.9 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: 9.2 µg/m³
  • PM10: 12.57 µg/m³
  • O3: 0.054 ppm
  • NO2: 7.5 ppb
  • SO2: 2 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.73 µg/m³
  • PM10: 13.22 µg/m³
  • O3: 0.054 ppm
  • NO2: 8.2 ppb
  • SO2: 1.9 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
48 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 9.59 µg/m³
  • PM10: 13.32 µg/m³
  • O3: 0.052 ppm
  • NO2: 10.1 ppb
  • SO2: 1.9 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.31 µg/m³
  • PM10: 13.5 µg/m³
  • O3: 0.048 ppm
  • NO2: 12.7 ppb
  • SO2: 2 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.89 µg/m³
  • PM10: 13.46 µg/m³
  • O3: 0.046 ppm
  • NO2: 13 ppb
  • SO2: 1.9 ppb
  • CO: 0.21 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.72 µg/m³
  • PM10: 13.78 µg/m³
  • O3: 0.045 ppm
  • NO2: 12.9 ppb
  • SO2: 1.8 ppb
  • CO: 0.22 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.99 µg/m³
  • PM10: 14.69 µg/m³
  • O3: 0.042 ppm
  • NO2: 13.7 ppb
  • SO2: 1.7 ppb
  • CO: 0.23 ppm

Health Recommendations:

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

11 PM
40 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 9.5 µg/m³
  • PM10: 15.8 µg/m³
  • O3: 0.041 ppm
  • NO2: 14.9 ppb
  • SO2: 1.7 ppb
  • CO: 0.24 ppm

Health Recommendations:

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