Hourly Weather | Today Wednesday, March 18, 2026
New Haven, Connecticut
8 AM
Cloudy Weather
27°
Feels Like 21°
0
Humidity: 47%
UV Index: 1
Wind: 8 mph
9 AM
Cloudy Weather
28°
Feels Like 25°
0
Humidity: 45%
UV Index: 2
Wind: 8 mph
10 AM
Cloudy Weather
30°
Feels Like 27°
0
Humidity: 43%
UV Index: 2
Wind: 8 mph
11 AM
Cloudy Weather
30°
Feels Like 28°
0
Humidity: 40%
UV Index: 3
Wind: 9 mph
12 PM
Cloudy Weather
34°
Feels Like 34°
0
Humidity: 38%
UV Index: 4
Wind: 8 mph
1 PM
Cloudy Weather
34°
Feels Like 37°
0
Humidity: 35%
UV Index: 5
Wind: 7 mph
2 PM
Cloudy Weather
36°
Feels Like 41°
0
Humidity: 34%
UV Index: 4
Wind: 6 mph
3 PM
Cloudy Weather
36°
Feels Like 37°
0
Humidity: 32%
UV Index: 4
Wind: 8 mph
4 PM
Cloudy Weather
36°
Feels Like 32°
0
Humidity: 33%
UV Index: 3
Wind: 9 mph
5 PM
Cloudy Weather
36°
Feels Like 30°
0
Humidity: 34%
UV Index: 2
Wind: 9 mph
6 PM
Cloudy Weather
36°
Feels Like 28°
0
Humidity: 36%
UV Index: 1
Wind: 9 mph
7 PM
Cloudy Weather
34°
Feels Like 28°
0
Humidity: 42%
UV Index: 0
Wind: 7 mph
8 PM
Cloudy Night
32°
Feels Like 28°
0
Humidity: 48%
UV Index: 0
Wind: 6 mph
9 PM
Cloudy Night
30°
Feels Like 27°
0
Humidity: 53%
UV Index: 0
Wind: 6 mph
10 PM
Cloudy Night
28°
Feels Like 27°
0
Humidity: 57%
UV Index: 0
Wind: 6 mph
11 PM
Cloudy Night
28°
Feels Like 27°
0
Humidity: 59%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 1.2 µg/m³
  • PM10: 2.88 µg/m³
  • O3: 0.049 ppm
  • NO2: 4.3 ppb
  • SO2: 1 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.31 µg/m³
  • PM10: 3.17 µg/m³
  • O3: 0.048 ppm
  • NO2: 5.5 ppb
  • SO2: 1.1 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.59 µg/m³
  • PM10: 3.76 µg/m³
  • O3: 0.048 ppm
  • NO2: 6.4 ppb
  • SO2: 1.2 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.15 µg/m³
  • PM10: 4.65 µg/m³
  • O3: 0.049 ppm
  • NO2: 6.9 ppb
  • SO2: 1.4 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.07 µg/m³
  • PM10: 5.77 µg/m³
  • O3: 0.049 ppm
  • NO2: 7 ppb
  • SO2: 1.5 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.35 µg/m³
  • PM10: 7.16 µg/m³
  • O3: 0.050 ppm
  • NO2: 6.9 ppb
  • SO2: 1.6 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.82 µg/m³
  • PM10: 8.66 µg/m³
  • O3: 0.052 ppm
  • NO2: 6.6 ppb
  • SO2: 1.6 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.11 µg/m³
  • PM10: 9.9 µg/m³
  • O3: 0.054 ppm
  • NO2: 6.1 ppb
  • SO2: 1.5 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.47 µg/m³
  • PM10: 10.08 µg/m³
  • O3: 0.055 ppm
  • NO2: 5.5 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.

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

Pollutant Concentrations:

  • PM2.5: 6.73 µg/m³
  • PM10: 8.99 µg/m³
  • O3: 0.056 ppm
  • NO2: 4.7 ppb
  • SO2: 1.1 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.

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

Pollutant Concentrations:

  • PM2.5: 5.51 µg/m³
  • PM10: 7.4 µg/m³
  • O3: 0.057 ppm
  • NO2: 3.7 ppb
  • SO2: 0.9 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.

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

Pollutant Concentrations:

  • PM2.5: 4.33 µg/m³
  • PM10: 5.89 µg/m³
  • O3: 0.058 ppm
  • NO2: 3 ppb
  • SO2: 0.7 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.

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

Pollutant Concentrations:

  • PM2.5: 3.62 µg/m³
  • PM10: 4.94 µg/m³
  • O3: 0.058 ppm
  • NO2: 2.2 ppb
  • SO2: 0.6 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.

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

Pollutant Concentrations:

  • PM2.5: 3.2 µg/m³
  • PM10: 4.36 µg/m³
  • O3: 0.058 ppm
  • NO2: 1.7 ppb
  • SO2: 0.6 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.84 µg/m³
  • PM10: 3.89 µg/m³
  • O3: 0.059 ppm
  • NO2: 1.4 ppb
  • SO2: 0.5 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

11 PM
65 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.62 µg/m³
  • PM10: 3.58 µg/m³
  • O3: 0.059 ppm
  • NO2: 1.2 ppb
  • SO2: 0.5 ppb
  • CO: 0.14 ppm

Health Recommendations:

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