Hourly Weather | Today Wednesday, November 19, 2025
Boston, Massachusetts
4 PM
Cloudy Weather
45°
Feels Like 43°
0
Humidity: 47%
Wind: 6 mph
UV Index: 1
5 PM
Cloudy Night
41°
Feels Like 39°
0
Humidity: 52%
Wind: 6 mph
UV Index: 0
6 PM
Cloudy Night
39°
Feels Like 37°
0
Humidity: 59%
Wind: 6 mph
UV Index: 0
7 PM
Cloudy Night
37°
Feels Like 36°
0
Humidity: 65%
Wind: 6 mph
UV Index: 0
8 PM
Cloudy Night
37°
Feels Like 34°
0
Humidity: 66%
Wind: 6 mph
UV Index: 0
9 PM
Cloudy Night
36°
Feels Like 34°
0
Humidity: 68%
Wind: 6 mph
UV Index: 0
10 PM
Cloudy Night
36°
Feels Like 32°
0
Humidity: 69%
Wind: 6 mph
UV Index: 0
11 PM
Night
34°
Feels Like 32°
0
Humidity: 69%
Wind: 6 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 2.29 µg/m³
  • PM10: 3.46 µg/m³
  • O3: 0.033 ppm
  • NO2: 6.3 ppb
  • SO2: 0.4 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.76 µg/m³
  • PM10: 4.08 µg/m³
  • O3: 0.031 ppm
  • NO2: 8.4 ppb
  • SO2: 0.5 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.4 µg/m³
  • PM10: 4.97 µg/m³
  • O3: 0.029 ppm
  • NO2: 10.6 ppb
  • SO2: 0.5 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.39 µg/m³
  • PM10: 6.32 µg/m³
  • O3: 0.026 ppm
  • NO2: 13 ppb
  • SO2: 0.5 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.23 µg/m³
  • PM10: 7.56 µg/m³
  • O3: 0.023 ppm
  • NO2: 14.7 ppb
  • SO2: 0.4 ppb
  • CO: 0.22 ppm

Health Recommendations:

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

9 PM
25 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 5.96 µg/m³
  • PM10: 8.65 µg/m³
  • O3: 0.021 ppm
  • NO2: 16 ppb
  • SO2: 0.4 ppb
  • CO: 0.24 ppm

Health Recommendations:

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

10 PM
28 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 6.68 µg/m³
  • PM10: 9.68 µg/m³
  • O3: 0.019 ppm
  • NO2: 17 ppb
  • SO2: 0.4 ppb
  • CO: 0.26 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.27 µg/m³
  • PM10: 10.46 µg/m³
  • O3: 0.018 ppm
  • NO2: 17.3 ppb
  • SO2: 0.4 ppb
  • CO: 0.27 ppm

Health Recommendations:

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