Hourly Weather | Today Tuesday, July 21, 2026
Bristol, Connecticut
5 AM
Cloudy Night
61°
Feels Like 61°
0
Humidity: 100%
UV Index: 0
Wind: 5 mph
6 AM
Cloudy Weather
63°
Feels Like 63°
0
Humidity: 100%
UV Index: 0
Wind: 6 mph
7 AM
Cloudy Weather
64°
Feels Like 66°
1
Humidity: 100%
UV Index: 1
Wind: 6 mph
8 AM
Cloudy Weather
66°
Feels Like 70°
19
Humidity: 97%
UV Index: 2
Wind: 7 mph
9 AM
Cloudy Weather
70°
Feels Like 73°
19
Humidity: 90%
UV Index: 3
Wind: 8 mph
10 AM
Cloudy Weather
72°
Feels Like 75°
24
Humidity: 85%
UV Index: 3
Wind: 9 mph
11 AM
Cloudy Weather
73°
Feels Like 77°
43
Humidity: 82%
UV Index: 3
Wind: 10 mph
12 PM
Cloudy Weather
75°
Feels Like 79°
47
Humidity: 81%
UV Index: 3
Wind: 10 mph
1 PM
Rainy Weather
75°
Feels Like 75°
51
Humidity: 81%
UV Index: 2
Wind: 10 mph
2 PM
Stormy Weather
75°
Feels Like 73°
66
Humidity: 81%
UV Index: 2
Wind: 10 mph
3 PM
Cloudy Weather
75°
Feels Like 79°
49
Humidity: 86%
UV Index: 2
Wind: 9 mph
4 PM
Cloudy Weather
75°
Feels Like 79°
49
Humidity: 89%
UV Index: 1
Wind: 9 mph
5 PM
Cloudy Weather
73°
Feels Like 79°
49
Humidity: 95%
UV Index: 1
Wind: 8 mph
6 PM
Stormy Weather
73°
Feels Like 73°
61
Humidity: 97%
UV Index: 0
Wind: 8 mph
7 PM
Cloudy Weather
73°
Feels Like 79°
49
Humidity: 98%
UV Index: 0
Wind: 7 mph
8 PM
Stormy Weather
73°
Feels Like 73°
54
Humidity: 97%
UV Index: 0
Wind: 7 mph
9 PM
Cloudy Weather
72°
Feels Like 75°
49
Humidity: 99%
UV Index: 0
Wind: 7 mph
10 PM
Cloudy Weather
72°
Feels Like 75°
46
Humidity: 99%
UV Index: 0
Wind: 7 mph
11 PM
Cloudy Weather
72°
Feels Like 75°
49
Humidity: 99%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

5 AM
68 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 9.38 µg/m³
  • PM10: 14.12 µg/m³
  • O3: 0.060 ppm
  • NO2: 2.7 ppb
  • SO2: 0.9 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 AM
65 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 9.06 µg/m³
  • PM10: 13.8 µg/m³
  • O3: 0.059 ppm
  • NO2: 3 ppb
  • SO2: 1 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 AM
60 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 8.6 µg/m³
  • PM10: 13.29 µg/m³
  • O3: 0.057 ppm
  • NO2: 3.6 ppb
  • SO2: 1 ppb
  • CO: 0.20 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: O3
Details

Pollutant Concentrations:

  • PM2.5: 8.03 µg/m³
  • PM10: 12.65 µg/m³
  • O3: 0.056 ppm
  • NO2: 4 ppb
  • SO2: 1 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.

9 AM
57 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 7.3 µg/m³
  • PM10: 11.72 µg/m³
  • O3: 0.056 ppm
  • NO2: 3.4 ppb
  • SO2: 0.8 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.

10 AM
55 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 6.52 µg/m³
  • PM10: 10.86 µg/m³
  • O3: 0.056 ppm
  • NO2: 2.8 ppb
  • SO2: 0.7 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.

11 AM
53 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.74 µg/m³
  • PM10: 10.1 µg/m³
  • O3: 0.055 ppm
  • NO2: 2.2 ppb
  • SO2: 0.6 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.

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

Pollutant Concentrations:

  • PM2.5: 5.12 µg/m³
  • PM10: 8.46 µg/m³
  • O3: 0.054 ppm
  • NO2: 1.8 ppb
  • SO2: 0.5 ppb
  • CO: 0.28 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.85 µg/m³
  • PM10: 7.24 µg/m³
  • O3: 0.052 ppm
  • NO2: 1.9 ppb
  • SO2: 0.5 ppb
  • CO: 0.28 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: 4.9 µg/m³
  • PM10: 6.86 µg/m³
  • O3: 0.049 ppm
  • NO2: 2 ppb
  • SO2: 0.5 ppb
  • CO: 0.26 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.08 µg/m³
  • PM10: 6.78 µg/m³
  • O3: 0.046 ppm
  • NO2: 2.6 ppb
  • SO2: 0.6 ppb
  • CO: 0.24 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.19 µg/m³
  • PM10: 6.65 µg/m³
  • O3: 0.041 ppm
  • NO2: 3.3 ppb
  • SO2: 0.6 ppb
  • CO: 0.21 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.22 µg/m³
  • PM10: 6.57 µg/m³
  • O3: 0.036 ppm
  • NO2: 4.1 ppb
  • SO2: 0.7 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.05 µg/m³
  • PM10: 6.35 µg/m³
  • O3: 0.031 ppm
  • NO2: 4.9 ppb
  • SO2: 0.7 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.86 µg/m³
  • PM10: 6.04 µg/m³
  • O3: 0.027 ppm
  • NO2: 5.3 ppb
  • SO2: 0.7 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.72 µg/m³
  • PM10: 5.72 µg/m³
  • O3: 0.026 ppm
  • NO2: 5.2 ppb
  • SO2: 0.7 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.6 µg/m³
  • PM10: 5.39 µg/m³
  • O3: 0.025 ppm
  • NO2: 4.9 ppb
  • SO2: 0.7 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.52 µg/m³
  • PM10: 5.17 µg/m³
  • O3: 0.026 ppm
  • NO2: 4.8 ppb
  • SO2: 0.6 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.38 µg/m³
  • PM10: 4.92 µg/m³
  • O3: 0.025 ppm
  • NO2: 4.9 ppb
  • SO2: 0.6 ppb
  • CO: 0.13 ppm

Health Recommendations:

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