Hourly Weather | Today Friday, May 15, 2026
Boston, Massachusetts
5 AM
Rainy Weather
52°
Feels Like 45°
51
Humidity: 94%
UV Index: 0
Wind: 7 mph
6 AM
Cloudy Weather
52°
Feels Like 48°
47
Humidity: 91%
UV Index: 0
Wind: 7 mph
7 AM
Cloudy Weather
52°
Feels Like 46°
47
Humidity: 93%
UV Index: 0
Wind: 8 mph
8 AM
Rainy Weather
50°
Feels Like 45°
51
Humidity: 95%
UV Index: 0
Wind: 6 mph
9 AM
Cloudy Weather
50°
Feels Like 48°
47
Humidity: 95%
UV Index: 1
Wind: 7 mph
10 AM
Cloudy Weather
52°
Feels Like 52°
47
Humidity: 92%
UV Index: 1
Wind: 7 mph
11 AM
Rainy Weather
52°
Feels Like 48°
52
Humidity: 89%
UV Index: 1
Wind: 7 mph
12 PM
Cloudy Weather
54°
Feels Like 54°
48
Humidity: 84%
UV Index: 2
Wind: 8 mph
1 PM
Cloudy Weather
54°
Feels Like 52°
41
Humidity: 85%
UV Index: 2
Wind: 8 mph
2 PM
Cloudy Weather
54°
Feels Like 52°
34
Humidity: 86%
UV Index: 2
Wind: 9 mph
3 PM
Cloudy Weather
52°
Feels Like 50°
34
Humidity: 86%
UV Index: 1
Wind: 9 mph
4 PM
Cloudy Weather
52°
Feels Like 48°
40
Humidity: 87%
UV Index: 1
Wind: 9 mph
5 PM
Rainy Weather
52°
Feels Like 45°
60
Humidity: 89%
UV Index: 1
Wind: 9 mph
6 PM
Rainy Weather
52°
Feels Like 45°
55
Humidity: 89%
UV Index: 0
Wind: 8 mph
7 PM
Cloudy Weather
52°
Feels Like 48°
49
Humidity: 91%
UV Index: 0
Wind: 8 mph
8 PM
Cloudy Night
52°
Feels Like 48°
2
Humidity: 91%
UV Index: 0
Wind: 7 mph
9 PM
Cloudy Night
50°
Feels Like 48°
2
Humidity: 92%
UV Index: 0
Wind: 6 mph
10 PM
Cloudy Night
50°
Feels Like 46°
2
Humidity: 93%
UV Index: 0
Wind: 6 mph
11 PM
Cloudy Night
50°
Feels Like 46°
2
Humidity: 93%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

5 AM
18 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.14 µg/m³
  • PM10: 4.55 µg/m³
  • O3: 0.019 ppm
  • NO2: 3.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

6 AM
19 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.76 µg/m³
  • PM10: 4.04 µg/m³
  • O3: 0.021 ppm
  • NO2: 3 ppb
  • SO2: 0.3 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

7 AM
20 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.46 µg/m³
  • PM10: 3.64 µg/m³
  • O3: 0.022 ppm
  • NO2: 2.9 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.28 µg/m³
  • PM10: 3.34 µg/m³
  • O3: 0.023 ppm
  • NO2: 3.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.12 µg/m³
  • PM10: 3.06 µg/m³
  • O3: 0.024 ppm
  • NO2: 3.7 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2 µg/m³
  • PM10: 2.82 µg/m³
  • O3: 0.024 ppm
  • NO2: 4.1 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.88 µg/m³
  • PM10: 2.61 µg/m³
  • O3: 0.025 ppm
  • NO2: 4.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.74 µg/m³
  • PM10: 2.42 µg/m³
  • O3: 0.026 ppm
  • NO2: 4.4 ppb
  • SO2: 0.4 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.63 µg/m³
  • PM10: 2.27 µg/m³
  • O3: 0.028 ppm
  • NO2: 4.4 ppb
  • SO2: 0.4 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.56 µg/m³
  • PM10: 2.18 µg/m³
  • O3: 0.029 ppm
  • NO2: 4.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.52 µg/m³
  • PM10: 2.18 µg/m³
  • O3: 0.031 ppm
  • NO2: 3.8 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.5 µg/m³
  • PM10: 2.24 µg/m³
  • O3: 0.033 ppm
  • NO2: 3.6 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.45 µg/m³
  • PM10: 2.21 µg/m³
  • O3: 0.035 ppm
  • NO2: 3.4 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.38 µg/m³
  • PM10: 2.14 µg/m³
  • O3: 0.036 ppm
  • NO2: 3.5 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.34 µg/m³
  • PM10: 2.09 µg/m³
  • O3: 0.036 ppm
  • NO2: 3.9 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

8 PM
33 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.32 µg/m³
  • PM10: 2.08 µg/m³
  • O3: 0.036 ppm
  • NO2: 4.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.36 µg/m³
  • PM10: 2.18 µg/m³
  • O3: 0.033 ppm
  • NO2: 4.6 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.48 µg/m³
  • PM10: 2.42 µg/m³
  • O3: 0.029 ppm
  • NO2: 5.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.61 µg/m³
  • PM10: 2.7 µg/m³
  • O3: 0.025 ppm
  • NO2: 5.6 ppb
  • SO2: 0.3 ppb
  • CO: 0.14 ppm

Health Recommendations:

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