Hourly Weather | Today Thursday, February 26, 2026
Hartford, Connecticut
2 AM
Cloudy Night
30°
Feels Like 25°
20
Frost Risk: 89%
Humidity: 100%
UV Index: 0
Wind: 8 mph
3 AM
Cloudy Night
30°
Feels Like 25°
20
Frost Risk: 94%
Humidity: 97%
UV Index: 0
Wind: 8 mph
4 AM
Cloudy Night
30°
Feels Like 25°
20
Frost Risk: 90%
Humidity: 93%
UV Index: 0
Wind: 8 mph
5 AM
Cloudy Night
30°
Feels Like 25°
20
Frost Risk: 61%
Humidity: 87%
UV Index: 0
Wind: 7 mph
6 AM
Cloudy Night
30°
Feels Like 27°
13
Humidity: 79%
UV Index: 0
Wind: 6 mph
7 AM
Cloudy Weather
30°
Feels Like 28°
0
Humidity: 73%
UV Index: 0
Wind: 5 mph
8 AM
Cloudy Weather
32°
Feels Like 34°
0
Humidity: 66%
UV Index: 1
Wind: 5 mph
9 AM
Cloudy Weather
36°
Feels Like 37°
0
Humidity: 59%
UV Index: 2
Wind: 6 mph
10 AM
Cloudy Weather
37°
Feels Like 39°
0
Humidity: 52%
UV Index: 2
Wind: 6 mph
11 AM
Cloudy Weather
39°
Feels Like 43°
0
Humidity: 48%
UV Index: 3
Wind: 6 mph
12 PM
Cloudy Weather
39°
Feels Like 45°
0
Humidity: 45%
UV Index: 3
Wind: 6 mph
1 PM
Cloudy Weather
41°
Feels Like 43°
3
Humidity: 44%
UV Index: 1
Wind: 6 mph
2 PM
Cloudy Weather
43°
Feels Like 43°
3
Humidity: 43%
UV Index: 1
Wind: 6 mph
3 PM
Cloudy Weather
39°
Feels Like 39°
3
Humidity: 46%
UV Index: 1
Wind: 6 mph
4 PM
Cloudy Weather
39°
Feels Like 37°
3
Humidity: 48%
UV Index: 1
Wind: 6 mph
5 PM
Cloudy Weather
37°
Feels Like 36°
3
Humidity: 53%
UV Index: 0
Wind: 6 mph
6 PM
Cloudy Weather
37°
Feels Like 36°
2
Humidity: 55%
UV Index: 0
Wind: 6 mph
7 PM
Cloudy Night
36°
Feels Like 34°
0
Humidity: 59%
UV Index: 0
Wind: 5 mph
8 PM
Cloudy Night
32°
Feels Like 28°
0
Humidity: 62%
UV Index: 0
Wind: 6 mph
9 PM
Cloudy Night
30°
Feels Like 27°
0
Humidity: 63%
UV Index: 0
Wind: 7 mph
10 PM
Cloudy Night
28°
Feels Like 25°
0
Humidity: 63%
UV Index: 0
Wind: 7 mph
11 PM
Cloudy Night
28°
Feels Like 23°
0
Humidity: 63%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

2 AM
54 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 13.7 µg/m³
  • PM10: 17.33 µg/m³
  • O3: 0.029 ppm
  • NO2: 15.5 ppb
  • SO2: 1.5 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.

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

Pollutant Concentrations:

  • PM2.5: 12.85 µg/m³
  • PM10: 16.27 µg/m³
  • O3: 0.029 ppm
  • NO2: 14.8 ppb
  • SO2: 1.5 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.

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

Pollutant Concentrations:

  • PM2.5: 11.73 µg/m³
  • PM10: 14.89 µg/m³
  • O3: 0.030 ppm
  • NO2: 13.8 ppb
  • SO2: 1.5 ppb
  • CO: 0.24 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 10.74 µg/m³
  • PM10: 13.69 µg/m³
  • O3: 0.031 ppm
  • NO2: 13 ppb
  • SO2: 1.6 ppb
  • CO: 0.24 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 10.53 µg/m³
  • PM10: 13.56 µg/m³
  • O3: 0.030 ppm
  • NO2: 13.5 ppb
  • SO2: 1.8 ppb
  • CO: 0.24 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 11.77 µg/m³
  • PM10: 15.64 µg/m³
  • O3: 0.028 ppm
  • NO2: 17.1 ppb
  • SO2: 2.3 ppb
  • CO: 0.26 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 13.93 µg/m³
  • PM10: 19.03 µg/m³
  • O3: 0.026 ppm
  • NO2: 20.5 ppb
  • SO2: 2.6 ppb
  • CO: 0.30 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 15.88 µg/m³
  • PM10: 21.8 µg/m³
  • O3: 0.030 ppm
  • NO2: 19.1 ppb
  • SO2: 2.9 ppb
  • CO: 0.34 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 17.62 µg/m³
  • PM10: 23.53 µg/m³
  • O3: 0.034 ppm
  • NO2: 16.7 ppb
  • SO2: 3.2 ppb
  • CO: 0.34 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 18.15 µg/m³
  • PM10: 23.01 µg/m³
  • O3: 0.042 ppm
  • NO2: 13.4 ppb
  • SO2: 3 ppb
  • CO: 0.30 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 22.12 µg/m³
  • PM10: 26.76 µg/m³
  • O3: 0.048 ppm
  • NO2: 12.3 ppb
  • SO2: 2.9 ppb
  • CO: 0.29 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 26.39 µg/m³
  • PM10: 30.93 µg/m³
  • O3: 0.055 ppm
  • NO2: 12 ppb
  • SO2: 2.7 ppb
  • CO: 0.29 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 30.67 µg/m³
  • PM10: 35.47 µg/m³
  • O3: 0.058 ppm
  • NO2: 13.6 ppb
  • SO2: 2.7 ppb
  • CO: 0.29 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 36.94 µg/m³
  • PM10: 42.55 µg/m³
  • O3: 0.059 ppm
  • NO2: 16.8 ppb
  • SO2: 2.9 ppb
  • CO: 0.31 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 42.56 µg/m³
  • PM10: 49.06 µg/m³
  • O3: 0.056 ppm
  • NO2: 21.9 ppb
  • SO2: 3 ppb
  • CO: 0.34 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 49.24 µg/m³
  • PM10: 57.38 µg/m³
  • O3: 0.045 ppm
  • NO2: 32.1 ppb
  • SO2: 2.7 ppb
  • CO: 0.40 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 57.75 µg/m³
  • PM10: 68.54 µg/m³
  • O3: 0.030 ppm
  • NO2: 44.8 ppb
  • SO2: 2.7 ppb
  • CO: 0.51 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 67.11 µg/m³
  • PM10: 81.19 µg/m³
  • O3: 0.022 ppm
  • NO2: 51.8 ppb
  • SO2: 2.8 ppb
  • CO: 0.62 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 76.18 µg/m³
  • PM10: 93.5 µg/m³
  • O3: 0.016 ppm
  • NO2: 57.6 ppb
  • SO2: 3 ppb
  • CO: 0.71 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 85.95 µg/m³
  • PM10: 106.4 µg/m³
  • O3: 0.012 ppm
  • NO2: 62.7 ppb
  • SO2: 3.1 ppb
  • CO: 0.82 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 94.86 µg/m³
  • PM10: 118.27 µg/m³
  • O3: 0.011 ppm
  • NO2: 66.5 ppb
  • SO2: 3.1 ppb
  • CO: 0.95 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 98.21 µg/m³
  • PM10: 122.29 µg/m³
  • O3: 0.008 ppm
  • NO2: 68.5 ppb
  • SO2: 3 ppb
  • CO: 1.03 ppm

Health Recommendations:

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