Hourly Weather | Today Thursday, February 26, 2026
West Haven, Connecticut
3 AM
Night
34°
Feels Like 28°
18
Frost Risk: 44%
Humidity: 93%
UV Index: 0
Wind: 7 mph
4 AM
Night
34°
Feels Like 28°
18
Humidity: 89%
UV Index: 0
Wind: 7 mph
5 AM
Night
32°
Feels Like 28°
18
Frost Risk: 63%
Humidity: 85%
UV Index: 0
Wind: 7 mph
6 AM
Night
32°
Feels Like 28°
12
Humidity: 78%
UV Index: 0
Wind: 7 mph
7 AM
Cloudy Weather
32°
Feels Like 27°
0
Humidity: 73%
UV Index: 0
Wind: 7 mph
8 AM
Cloudy Weather
34°
Feels Like 30°
0
Humidity: 68%
UV Index: 1
Wind: 7 mph
9 AM
Cloudy Weather
36°
Feels Like 32°
0
Humidity: 63%
UV Index: 2
Wind: 8 mph
10 AM
Cloudy Weather
37°
Feels Like 36°
0
Humidity: 57%
UV Index: 2
Wind: 8 mph
11 AM
Cloudy Weather
39°
Feels Like 37°
0
Humidity: 55%
UV Index: 2
Wind: 8 mph
12 PM
Cloudy Weather
39°
Feels Like 39°
0
Humidity: 54%
UV Index: 2
Wind: 7 mph
1 PM
Cloudy Weather
41°
Feels Like 41°
7
Humidity: 53%
UV Index: 1
Wind: 6 mph
2 PM
Cloudy Weather
39°
Feels Like 39°
7
Humidity: 56%
UV Index: 1
Wind: 6 mph
3 PM
Cloudy Weather
39°
Feels Like 37°
7
Humidity: 59%
UV Index: 1
Wind: 6 mph
4 PM
Cloudy Weather
39°
Feels Like 37°
7
Humidity: 62%
UV Index: 0
Wind: 6 mph
5 PM
Cloudy Weather
37°
Feels Like 36°
7
Humidity: 64%
UV Index: 0
Wind: 6 mph
6 PM
Cloudy Night
37°
Feels Like 36°
7
Humidity: 66%
UV Index: 0
Wind: 6 mph
7 PM
Cloudy Night
36°
Feels Like 34°
7
Humidity: 68%
UV Index: 0
Wind: 4 mph
8 PM
Cloudy Night
34°
Feels Like 32°
7
Humidity: 69%
UV Index: 0
Wind: 4 mph
9 PM
Cloudy Night
32°
Feels Like 30°
7
Humidity: 72%
UV Index: 0
Wind: 4 mph
10 PM
Cloudy Night
30°
Feels Like 28°
7
Humidity: 72%
UV Index: 0
Wind: 4 mph
11 PM
Cloudy Night
30°
Feels Like 28°
7
Humidity: 70%
UV Index: 0
Wind: 4 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 9.58 µg/m³
  • PM10: 11.88 µg/m³
  • O3: 0.036 ppm
  • NO2: 7.2 ppb
  • SO2: 0.8 ppb
  • CO: 0.21 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.4 µg/m³
  • PM10: 11.63 µg/m³
  • O3: 0.036 ppm
  • NO2: 7.2 ppb
  • SO2: 1 ppb
  • CO: 0.21 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.1 µg/m³
  • PM10: 11.26 µg/m³
  • O3: 0.037 ppm
  • NO2: 7 ppb
  • SO2: 1.1 ppb
  • CO: 0.21 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.05 µg/m³
  • PM10: 11.2 µg/m³
  • O3: 0.038 ppm
  • NO2: 7.2 ppb
  • SO2: 1.3 ppb
  • CO: 0.21 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.34 µg/m³
  • PM10: 11.56 µg/m³
  • O3: 0.038 ppm
  • NO2: 7.9 ppb
  • SO2: 1.5 ppb
  • CO: 0.21 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 10.04 µg/m³
  • PM10: 12.54 µg/m³
  • O3: 0.038 ppm
  • NO2: 10.3 ppb
  • SO2: 1.8 ppb
  • CO: 0.22 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 11.68 µg/m³
  • PM10: 15.15 µg/m³
  • O3: 0.037 ppm
  • NO2: 14.4 ppb
  • SO2: 2.2 ppb
  • CO: 0.24 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 14.77 µg/m³
  • PM10: 19.63 µg/m³
  • O3: 0.036 ppm
  • NO2: 17.3 ppb
  • SO2: 2.8 ppb
  • CO: 0.28 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 19.09 µg/m³
  • PM10: 24.72 µg/m³
  • O3: 0.037 ppm
  • NO2: 18.2 ppb
  • SO2: 3.2 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
79 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 25.7 µg/m³
  • PM10: 31.89 µg/m³
  • O3: 0.040 ppm
  • NO2: 19 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.

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

Pollutant Concentrations:

  • PM2.5: 33.32 µg/m³
  • PM10: 39.84 µg/m³
  • O3: 0.044 ppm
  • NO2: 19.8 ppb
  • SO2: 3.4 ppb
  • CO: 0.33 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 38.2 µg/m³
  • PM10: 44.78 µg/m³
  • O3: 0.044 ppm
  • NO2: 22.6 ppb
  • SO2: 3.3 ppb
  • CO: 0.34 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 38.94 µg/m³
  • PM10: 45.29 µg/m³
  • O3: 0.044 ppm
  • NO2: 23 ppb
  • SO2: 3.1 ppb
  • CO: 0.33 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 36.92 µg/m³
  • PM10: 42.78 µg/m³
  • O3: 0.043 ppm
  • NO2: 23.2 ppb
  • SO2: 2.9 ppb
  • CO: 0.32 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 33.64 µg/m³
  • PM10: 38.92 µg/m³
  • O3: 0.042 ppm
  • NO2: 22.9 ppb
  • SO2: 2.6 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.

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

Pollutant Concentrations:

  • PM2.5: 30.43 µg/m³
  • PM10: 35.2 µg/m³
  • O3: 0.040 ppm
  • NO2: 21.2 ppb
  • SO2: 2.3 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.

7 PM
84 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 27.8 µg/m³
  • PM10: 32.14 µg/m³
  • O3: 0.038 ppm
  • NO2: 18.4 ppb
  • SO2: 2 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.

8 PM
82 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 27.06 µg/m³
  • PM10: 31.22 µg/m³
  • O3: 0.035 ppm
  • NO2: 17.1 ppb
  • SO2: 1.8 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 PM
86 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 28.77 µg/m³
  • PM10: 33.07 µg/m³
  • O3: 0.032 ppm
  • NO2: 18 ppb
  • SO2: 1.6 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.

10 PM
98 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 34.36 µg/m³
  • PM10: 39.67 µg/m³
  • O3: 0.025 ppm
  • NO2: 24.5 ppb
  • SO2: 1.5 ppb
  • CO: 0.37 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 43.69 µg/m³
  • PM10: 51.15 µg/m³
  • O3: 0.016 ppm
  • NO2: 38.2 ppb
  • SO2: 1.7 ppb
  • CO: 0.47 ppm

Health Recommendations:

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