Hourly Weather | Today Monday, April 27, 2026
New Haven, Connecticut
4 PM
Cloudy Weather
63°
Feels Like 63°
0
Humidity: 44%
UV Index: 4
Wind: 10 mph
5 PM
Cloudy Weather
61°
Feels Like 61°
0
Humidity: 47%
UV Index: 3
Wind: 10 mph
6 PM
Cloudy Weather
59°
Feels Like 57°
0
Humidity: 49%
UV Index: 2
Wind: 9 mph
7 PM
Cloudy Weather
57°
Feels Like 55°
0
Humidity: 54%
UV Index: 1
Wind: 8 mph
8 PM
Night
55°
Feels Like 52°
0
Humidity: 62%
UV Index: 0
Wind: 7 mph
9 PM
Night
52°
Feels Like 50°
0
Humidity: 70%
UV Index: 0
Wind: 6 mph
10 PM
Night
48°
Feels Like 48°
0
Humidity: 79%
UV Index: 0
Wind: 5 mph
11 PM
Night
46°
Feels Like 46°
0
Humidity: 87%
UV Index: 0
Wind: 4 mph

Hourly Air Quality Forecast - AQI (US EPA)

4 PM
172 AQI
Unhealthy air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 44.71 µg/m³
  • PM10: 49.6 µg/m³
  • O3: 0.094 ppm
  • NO2: 4.8 ppb
  • SO2: 1 ppb
  • CO: 0.27 ppm

Health Recommendations:

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

5 PM
156 AQI
Unhealthy air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 33.19 µg/m³
  • PM10: 36.53 µg/m³
  • O3: 0.087 ppm
  • NO2: 2.8 ppb
  • SO2: 0.7 ppb
  • CO: 0.23 ppm

Health Recommendations:

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

6 PM
125 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 22.28 µg/m³
  • PM10: 24.62 µg/m³
  • O3: 0.078 ppm
  • NO2: 2.2 ppb
  • SO2: 0.5 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

7 PM
97 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 15.46 µg/m³
  • PM10: 17.35 µg/m³
  • O3: 0.069 ppm
  • NO2: 2.2 ppb
  • SO2: 0.4 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

8 PM
77 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 11.57 µg/m³
  • PM10: 13.26 µg/m³
  • O3: 0.063 ppm
  • NO2: 2.2 ppb
  • SO2: 0.4 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.

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

Pollutant Concentrations:

  • PM2.5: 8.46 µg/m³
  • PM10: 10.04 µg/m³
  • O3: 0.058 ppm
  • NO2: 1.7 ppb
  • SO2: 0.3 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

10 PM
51 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 6.84 µg/m³
  • PM10: 8.41 µg/m³
  • O3: 0.054 ppm
  • NO2: 1.7 ppb
  • SO2: 0.3 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6 µg/m³
  • PM10: 7.6 µg/m³
  • O3: 0.052 ppm
  • NO2: 1.8 ppb
  • SO2: 0.3 ppb
  • CO: 0.14 ppm

Health Recommendations:

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