Hourly Weather | Today Thursday, February 26, 2026
Bristol, Connecticut
4 AM
Cloudy Night
30°
Feels Like 23°
34
Frost Risk: 80%
Humidity: 85%
UV Index: 0
Wind: 8 mph
5 AM
Cloudy Night
30°
Feels Like 23°
34
Frost Risk: 62%
Humidity: 81%
UV Index: 0
Wind: 7 mph
6 AM
Cloudy Night
28°
Feels Like 25°
22
Frost Risk: 73%
Humidity: 75%
UV Index: 0
Wind: 6 mph
7 AM
Cloudy Weather
28°
Feels Like 27°
0
Humidity: 72%
UV Index: 0
Wind: 4 mph
8 AM
Cloudy Weather
30°
Feels Like 30°
0
Humidity: 64%
UV Index: 1
Wind: 6 mph
9 AM
Cloudy Weather
34°
Feels Like 34°
0
Humidity: 58%
UV Index: 2
Wind: 7 mph
10 AM
Cloudy Weather
37°
Feels Like 37°
0
Humidity: 51%
UV Index: 2
Wind: 7 mph
11 AM
Cloudy Weather
39°
Feels Like 39°
0
Humidity: 47%
UV Index: 3
Wind: 7 mph
12 PM
Cloudy Weather
39°
Feels Like 41°
0
Humidity: 45%
UV Index: 3
Wind: 7 mph
1 PM
Cloudy Weather
39°
Feels Like 39°
4
Humidity: 45%
UV Index: 1
Wind: 7 mph
2 PM
Cloudy Weather
41°
Feels Like 39°
4
Humidity: 43%
UV Index: 1
Wind: 7 mph
3 PM
Cloudy Weather
39°
Feels Like 37°
4
Humidity: 47%
UV Index: 1
Wind: 6 mph
4 PM
Cloudy Weather
39°
Feels Like 37°
4
Humidity: 49%
UV Index: 1
Wind: 6 mph
5 PM
Cloudy Weather
37°
Feels Like 34°
4
Humidity: 53%
UV Index: 0
Wind: 6 mph
6 PM
Cloudy Weather
36°
Feels Like 34°
2
Humidity: 55%
UV Index: 0
Wind: 4 mph
7 PM
Cloudy Night
34°
Feels Like 32°
0
Humidity: 59%
UV Index: 0
Wind: 4 mph
8 PM
Cloudy Night
30°
Feels Like 28°
0
Humidity: 64%
UV Index: 0
Wind: 4 mph
9 PM
Cloudy Night
28°
Feels Like 27°
0
Humidity: 67%
UV Index: 0
Wind: 4 mph
10 PM
Cloudy Night
25°
Feels Like 25°
0
Humidity: 70%
UV Index: 0
Wind: 4 mph
11 PM
Cloudy Night
23°
Feels Like 23°
0
Frost Risk: 99%
Humidity: 72%
UV Index: 0
Wind: 4 mph

Hourly Air Quality Forecast - AQI (US EPA)

4 AM
43 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 10.43 µg/m³
  • PM10: 13.31 µg/m³
  • O3: 0.032 ppm
  • NO2: 12.4 ppb
  • SO2: 1.6 ppb
  • CO: 0.23 ppm

Health Recommendations:

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

5 AM
41 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 9.74 µg/m³
  • PM10: 12.48 µg/m³
  • O3: 0.032 ppm
  • NO2: 11.9 ppb
  • SO2: 1.6 ppb
  • CO: 0.23 ppm

Health Recommendations:

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

6 AM
42 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 9.98 µg/m³
  • PM10: 12.96 µg/m³
  • O3: 0.031 ppm
  • NO2: 13.1 ppb
  • SO2: 1.9 ppb
  • CO: 0.24 ppm

Health Recommendations:

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

7 AM
50 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 12.08 µg/m³
  • PM10: 16.25 µg/m³
  • O3: 0.027 ppm
  • NO2: 18.1 ppb
  • SO2: 2.3 ppb
  • CO: 0.27 ppm

Health Recommendations:

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

8 AM
57 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 15.08 µg/m³
  • PM10: 20.84 µg/m³
  • O3: 0.025 ppm
  • NO2: 21.9 ppb
  • SO2: 2.6 ppb
  • CO: 0.32 ppm

Health Recommendations:

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

9 AM
61 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 17.34 µg/m³
  • PM10: 24.04 µg/m³
  • O3: 0.029 ppm
  • NO2: 20.2 ppb
  • SO2: 3 ppb
  • CO: 0.36 ppm

Health Recommendations:

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

10 AM
65 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 19.07 µg/m³
  • PM10: 25.7 µg/m³
  • O3: 0.034 ppm
  • NO2: 17.8 ppb
  • SO2: 3.3 ppb
  • CO: 0.36 ppm

Health Recommendations:

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

11 AM
67 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 19.93 µg/m³
  • PM10: 25.51 µg/m³
  • O3: 0.041 ppm
  • NO2: 14.8 ppb
  • SO2: 3.3 ppb
  • CO: 0.32 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 24.59 µg/m³
  • PM10: 30.03 µg/m³
  • O3: 0.048 ppm
  • NO2: 14.1 ppb
  • SO2: 3.2 ppb
  • CO: 0.31 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 30.05 µg/m³
  • PM10: 35.5 µg/m³
  • O3: 0.054 ppm
  • NO2: 14.4 ppb
  • SO2: 3.2 ppb
  • CO: 0.31 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 35.56 µg/m³
  • PM10: 41.43 µg/m³
  • O3: 0.057 ppm
  • NO2: 16.7 ppb
  • SO2: 3.2 ppb
  • CO: 0.32 ppm

Health Recommendations:

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

3 PM
120 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 43.32 µg/m³
  • PM10: 50.28 µg/m³
  • O3: 0.057 ppm
  • NO2: 21 ppb
  • SO2: 3.5 ppb
  • CO: 0.36 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

4 PM
136 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 49.87 µg/m³
  • PM10: 57.95 µg/m³
  • O3: 0.053 ppm
  • NO2: 27.3 ppb
  • SO2: 3.7 ppb
  • CO: 0.39 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

5 PM
151 AQI
Unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 57.77 µg/m³
  • PM10: 68.19 µg/m³
  • O3: 0.039 ppm
  • NO2: 40.8 ppb
  • SO2: 3.2 ppb
  • CO: 0.48 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.

6 PM
156 AQI
Unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 67.6 µg/m³
  • PM10: 81.65 µg/m³
  • O3: 0.022 ppm
  • NO2: 56.3 ppb
  • SO2: 3.2 ppb
  • CO: 0.62 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.

7 PM
162 AQI
Unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 77.66 µg/m³
  • PM10: 95.85 µg/m³
  • O3: 0.017 ppm
  • NO2: 60 ppb
  • SO2: 3.3 ppb
  • CO: 0.75 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.

8 PM
167 AQI
Unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 87.55 µg/m³
  • PM10: 109.75 µg/m³
  • O3: 0.013 ppm
  • NO2: 62.3 ppb
  • SO2: 3.3 ppb
  • CO: 0.87 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.

9 PM
173 AQI
Unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 98.23 µg/m³
  • PM10: 123.88 µg/m³
  • O3: 0.011 ppm
  • NO2: 65.5 ppb
  • SO2: 3.4 ppb
  • CO: 1.00 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.

10 PM
177 AQI
Unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 106.83 µg/m³
  • PM10: 135.19 µg/m³
  • O3: 0.008 ppm
  • NO2: 69.5 ppb
  • SO2: 3.3 ppb
  • CO: 1.13 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.

11 PM
178 AQI
Unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 108.09 µg/m³
  • PM10: 136.16 µg/m³
  • O3: 0.005 ppm
  • NO2: 72.8 ppb
  • SO2: 3 ppb
  • CO: 1.19 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.