Hourly Weather | Today Saturday, September 19, 2026
Hartford, Connecticut
7 AM
Sunny Weather
54°
Feels Like 54°
0
Humidity: 68%
UV Index: 0
Wind: 6 mph
8 AM
Cloudy Weather
59°
Feels Like 61°
0
Humidity: 58%
UV Index: 1
Wind: 6 mph
9 AM
Cloudy Weather
61°
Feels Like 63°
0
Humidity: 54%
UV Index: 2
Wind: 6 mph
10 AM
Cloudy Weather
63°
Feels Like 66°
0
Humidity: 49%
UV Index: 3
Wind: 6 mph
11 AM
Cloudy Weather
64°
Feels Like 70°
0
Humidity: 45%
UV Index: 4
Wind: 6 mph
12 PM
Cloudy Weather
66°
Feels Like 72°
0
Humidity: 42%
UV Index: 5
Wind: 6 mph
1 PM
Cloudy Weather
70°
Feels Like 75°
0
Humidity: 40%
UV Index: 5
Wind: 6 mph
2 PM
Cloudy Weather
70°
Feels Like 75°
0
Humidity: 39%
UV Index: 5
Wind: 5 mph
3 PM
Cloudy Weather
70°
Feels Like 75°
0
Humidity: 38%
UV Index: 4
Wind: 5 mph
4 PM
Cloudy Weather
70°
Feels Like 73°
0
Humidity: 37%
UV Index: 3
Wind: 4 mph
5 PM
Cloudy Weather
70°
Feels Like 72°
0
Humidity: 39%
UV Index: 2
Wind: 5 mph
6 PM
Cloudy Weather
66°
Feels Like 66°
0
Humidity: 44%
UV Index: 1
Wind: 5 mph
7 PM
Cloudy Night
64°
Feels Like 64°
0
Humidity: 52%
UV Index: 0
Wind: 5 mph
8 PM
Cloudy Weather
63°
Feels Like 61°
7
Humidity: 61%
UV Index: 0
Wind: 6 mph
9 PM
Cloudy Weather
61°
Feels Like 59°
7
Humidity: 68%
UV Index: 0
Wind: 5 mph
10 PM
Cloudy Weather
57°
Feels Like 57°
7
Humidity: 73%
UV Index: 0
Wind: 5 mph
11 PM
Cloudy Weather
57°
Feels Like 57°
7
Humidity: 76%
UV Index: 0
Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

7 AM
28 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.59 µg/m³
  • PM10: 3.28 µg/m³
  • O3: 0.030 ppm
  • NO2: 2.7 ppb
  • SO2: 0.6 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.7 µg/m³
  • PM10: 3.57 µg/m³
  • O3: 0.029 ppm
  • NO2: 3.3 ppb
  • SO2: 0.7 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.79 µg/m³
  • PM10: 3.78 µg/m³
  • O3: 0.028 ppm
  • NO2: 3.2 ppb
  • SO2: 0.7 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.85 µg/m³
  • PM10: 3.91 µg/m³
  • O3: 0.029 ppm
  • NO2: 2.9 ppb
  • SO2: 0.7 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.95 µg/m³
  • PM10: 4.04 µg/m³
  • O3: 0.030 ppm
  • NO2: 2.6 ppb
  • SO2: 0.7 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.16 µg/m³
  • PM10: 4.2 µg/m³
  • O3: 0.033 ppm
  • NO2: 2.2 ppb
  • SO2: 0.7 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.55 µg/m³
  • PM10: 4.59 µg/m³
  • O3: 0.037 ppm
  • NO2: 1.8 ppb
  • SO2: 0.7 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3 µg/m³
  • PM10: 5.09 µg/m³
  • O3: 0.040 ppm
  • NO2: 1.7 ppb
  • SO2: 0.7 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.27 µg/m³
  • PM10: 5.34 µg/m³
  • O3: 0.043 ppm
  • NO2: 1.5 ppb
  • SO2: 0.6 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.32 µg/m³
  • PM10: 5.4 µg/m³
  • O3: 0.044 ppm
  • NO2: 1.4 ppb
  • SO2: 0.6 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.18 µg/m³
  • PM10: 5.28 µg/m³
  • O3: 0.044 ppm
  • NO2: 1.6 ppb
  • SO2: 0.6 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.92 µg/m³
  • PM10: 5.08 µg/m³
  • O3: 0.043 ppm
  • NO2: 2 ppb
  • SO2: 0.6 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.61 µg/m³
  • PM10: 4.94 µg/m³
  • O3: 0.040 ppm
  • NO2: 2.3 ppb
  • SO2: 0.6 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.28 µg/m³
  • PM10: 4.82 µg/m³
  • O3: 0.038 ppm
  • NO2: 2.2 ppb
  • SO2: 0.5 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.96 µg/m³
  • PM10: 4.71 µg/m³
  • O3: 0.036 ppm
  • NO2: 2.1 ppb
  • SO2: 0.5 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.75 µg/m³
  • PM10: 4.75 µg/m³
  • O3: 0.035 ppm
  • NO2: 2.2 ppb
  • SO2: 0.5 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.62 µg/m³
  • PM10: 4.82 µg/m³
  • O3: 0.034 ppm
  • NO2: 2.2 ppb
  • SO2: 0.5 ppb
  • CO: 0.19 ppm

Health Recommendations:

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