Hourly Weather | Today Tuesday, December 9, 2025
Boston, Massachusetts
9 PM
Cloudy Weather
27°
Feels Like 18°
2
Humidity: 57%
Wind: 10 mph
UV Index: 0
10 PM
Cloudy Weather
28°
Feels Like 19°
2
Humidity: 64%
Wind: 10 mph
UV Index: 0
11 PM
Cloudy Weather
30°
Feels Like 19°
2
Humidity: 72%
Wind: 10 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 0.87 µg/m³
  • PM10: 2.77 µg/m³
  • O3: 0.042 ppm
  • NO2: 1.4 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.87 µg/m³
  • PM10: 2.85 µg/m³
  • O3: 0.041 ppm
  • NO2: 1.4 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.89 µg/m³
  • PM10: 2.82 µg/m³
  • O3: 0.042 ppm
  • NO2: 1.4 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

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