Hourly Weather | Today Tuesday, August 25, 2026
Hartford, Connecticut
1 PM
Cloudy Weather
75°
Feels Like 82°
8
Humidity: 56%
UV Index: 7
Wind: 8 mph
2 PM
Cloudy Weather
77°
Feels Like 82°
47
Humidity: 54%
UV Index: 6
Wind: 8 mph
3 PM
Partly Sunny with Showers
79°
Feels Like 81°
51
Humidity: 53%
UV Index: 5
Wind: 8 mph
4 PM
Cloudy Weather
79°
Feels Like 81°
47
Humidity: 54%
UV Index: 4
Wind: 8 mph
5 PM
Cloudy Weather
75°
Feels Like 77°
19
Humidity: 56%
UV Index: 2
Wind: 8 mph
6 PM
Cloudy Weather
75°
Feels Like 75°
19
Humidity: 59%
UV Index: 2
Wind: 7 mph
7 PM
Cloudy Weather
73°
Feels Like 72°
13
Humidity: 66%
UV Index: 1
Wind: 6 mph
8 PM
Cloudy Night
72°
Feels Like 70°
0
Humidity: 71%
UV Index: 0
Wind: 6 mph
9 PM
Cloudy Night
70°
Feels Like 66°
0
Humidity: 78%
UV Index: 0
Wind: 6 mph
10 PM
Cloudy Night
66°
Feels Like 64°
0
Humidity: 84%
UV Index: 0
Wind: 5 mph
11 PM
Cloudy Night
66°
Feels Like 64°
0
Humidity: 86%
UV Index: 0
Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 8.87 µg/m³
  • PM10: 10.24 µg/m³
  • O3: 0.046 ppm
  • NO2: 4.1 ppb
  • SO2: 1.5 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 10.44 µg/m³
  • PM10: 11.72 µg/m³
  • O3: 0.053 ppm
  • NO2: 3.4 ppb
  • SO2: 1.4 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

3 PM
57 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 10.87 µg/m³
  • PM10: 12.07 µg/m³
  • O3: 0.056 ppm
  • NO2: 3.1 ppb
  • SO2: 1.4 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

4 PM
62 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 10.31 µg/m³
  • PM10: 11.39 µg/m³
  • O3: 0.058 ppm
  • NO2: 2.8 ppb
  • SO2: 1.3 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.2 µg/m³
  • PM10: 10.22 µg/m³
  • O3: 0.057 ppm
  • NO2: 3.1 ppb
  • SO2: 1.2 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.27 µg/m³
  • PM10: 9.47 µg/m³
  • O3: 0.054 ppm
  • NO2: 4.9 ppb
  • SO2: 1.3 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.34 µg/m³
  • PM10: 8.97 µg/m³
  • O3: 0.047 ppm
  • NO2: 8.8 ppb
  • SO2: 1.6 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.24 µg/m³
  • PM10: 8.31 µg/m³
  • O3: 0.038 ppm
  • NO2: 12.4 ppb
  • SO2: 1.8 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.61 µg/m³
  • PM10: 8.09 µg/m³
  • O3: 0.032 ppm
  • NO2: 14.4 ppb
  • SO2: 1.9 ppb
  • CO: 0.21 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.41 µg/m³
  • PM10: 8.31 µg/m³
  • O3: 0.027 ppm
  • NO2: 16.3 ppb
  • SO2: 2 ppb
  • CO: 0.22 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.23 µg/m³
  • PM10: 8.32 µg/m³
  • O3: 0.022 ppm
  • NO2: 17.6 ppb
  • SO2: 2 ppb
  • CO: 0.23 ppm

Health Recommendations:

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