Hourly Weather | Today Friday, June 26, 2026
Cambridge, Massachusetts
1 AM
Cloudy Night
66°
Feels Like 66°
29
Humidity: 91%
UV Index: 0
Wind: 6 mph
2 AM
Cloudy Night
66°
Feels Like 64°
20
Humidity: 91%
UV Index: 0
Wind: 6 mph
3 AM
Cloudy Night
66°
Feels Like 64°
20
Humidity: 91%
UV Index: 0
Wind: 6 mph
4 AM
Cloudy Night
64°
Feels Like 64°
20
Humidity: 91%
UV Index: 0
Wind: 6 mph
5 AM
Cloudy Night
64°
Feels Like 64°
20
Humidity: 94%
UV Index: 0
Wind: 6 mph
6 AM
Cloudy Weather
66°
Feels Like 64°
20
Humidity: 89%
UV Index: 0
Wind: 6 mph
7 AM
Cloudy Weather
66°
Feels Like 68°
15
Humidity: 85%
UV Index: 1
Wind: 6 mph
8 AM
Cloudy Weather
70°
Feels Like 72°
4
Humidity: 80%
UV Index: 2
Wind: 6 mph
9 AM
Cloudy Weather
72°
Feels Like 75°
4
Humidity: 74%
UV Index: 3
Wind: 6 mph
10 AM
Cloudy Weather
73°
Feels Like 79°
4
Humidity: 69%
UV Index: 4
Wind: 6 mph
11 AM
Cloudy Weather
75°
Feels Like 82°
6
Humidity: 64%
UV Index: 5
Wind: 6 mph
12 PM
Cloudy Weather
79°
Feels Like 86°
6
Humidity: 60%
UV Index: 6
Wind: 6 mph
1 PM
Cloudy Weather
77°
Feels Like 84°
8
Humidity: 63%
UV Index: 7
Wind: 7 mph
2 PM
Cloudy Weather
75°
Feels Like 82°
13
Humidity: 64%
UV Index: 6
Wind: 7 mph
3 PM
Cloudy Weather
75°
Feels Like 81°
13
Humidity: 65%
UV Index: 5
Wind: 8 mph
4 PM
Cloudy Weather
75°
Feels Like 77°
17
Humidity: 67%
UV Index: 3
Wind: 8 mph
5 PM
Cloudy Weather
73°
Feels Like 75°
43
Humidity: 69%
UV Index: 2
Wind: 8 mph
6 PM
Cloudy Weather
73°
Feels Like 73°
47
Humidity: 73%
UV Index: 2
Wind: 8 mph
7 PM
Partly Sunny with Showers
72°
Feels Like 66°
51
Humidity: 78%
UV Index: 1
Wind: 7 mph
8 PM
Cloudy Weather
70°
Feels Like 70°
13
Humidity: 81%
UV Index: 0
Wind: 6 mph
9 PM
Cloudy Weather
68°
Feels Like 66°
9
Humidity: 85%
UV Index: 0
Wind: 6 mph
10 PM
Cloudy Weather
66°
Feels Like 64°
9
Humidity: 90%
UV Index: 0
Wind: 5 mph
11 PM
Cloudy Night
64°
Feels Like 64°
9
Humidity: 93%
UV Index: 0
Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

1 AM
43 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 10.25 µg/m³
  • PM10: 16.26 µg/m³
  • O3: 0.041 ppm
  • NO2: 1 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

2 AM
40 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 9.48 µg/m³
  • PM10: 15.25 µg/m³
  • O3: 0.040 ppm
  • NO2: 0.9 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

3 AM
37 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 8.88 µg/m³
  • PM10: 14.44 µg/m³
  • O3: 0.040 ppm
  • NO2: 0.7 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

4 AM
36 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 8.46 µg/m³
  • PM10: 13.88 µg/m³
  • O3: 0.039 ppm
  • NO2: 0.7 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.15 µg/m³
  • PM10: 13.47 µg/m³
  • O3: 0.038 ppm
  • NO2: 0.7 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.89 µg/m³
  • PM10: 12.79 µg/m³
  • O3: 0.038 ppm
  • NO2: 0.7 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.64 µg/m³
  • PM10: 12.13 µg/m³
  • O3: 0.038 ppm
  • NO2: 0.8 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.44 µg/m³
  • PM10: 11.73 µg/m³
  • O3: 0.038 ppm
  • NO2: 0.9 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.27 µg/m³
  • PM10: 11.36 µg/m³
  • O3: 0.039 ppm
  • NO2: 1.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.17 µg/m³
  • PM10: 11.11 µg/m³
  • O3: 0.040 ppm
  • NO2: 1.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.08 µg/m³
  • PM10: 10.99 µg/m³
  • O3: 0.042 ppm
  • NO2: 0.9 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.04 µg/m³
  • PM10: 11 µg/m³
  • O3: 0.043 ppm
  • NO2: 0.7 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.01 µg/m³
  • PM10: 11.46 µg/m³
  • O3: 0.045 ppm
  • NO2: 0.6 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.19 µg/m³
  • PM10: 12.39 µg/m³
  • O3: 0.046 ppm
  • NO2: 0.5 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.73 µg/m³
  • PM10: 13.94 µg/m³
  • O3: 0.048 ppm
  • NO2: 0.5 ppb
  • SO2: 0.3 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.49 µg/m³
  • PM10: 15.57 µg/m³
  • O3: 0.050 ppm
  • NO2: 0.6 ppb
  • SO2: 0.3 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.42 µg/m³
  • PM10: 16.92 µg/m³
  • O3: 0.051 ppm
  • NO2: 0.8 ppb
  • SO2: 0.3 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 10.3 µg/m³
  • PM10: 18.07 µg/m³
  • O3: 0.051 ppm
  • NO2: 1.2 ppb
  • SO2: 0.4 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

7 PM
46 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 10.97 µg/m³
  • PM10: 18.79 µg/m³
  • O3: 0.048 ppm
  • NO2: 1.9 ppb
  • SO2: 0.4 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 11.57 µg/m³
  • PM10: 19.11 µg/m³
  • O3: 0.046 ppm
  • NO2: 2.4 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 12.1 µg/m³
  • PM10: 19.34 µg/m³
  • O3: 0.044 ppm
  • NO2: 2.6 ppb
  • SO2: 0.3 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

10 PM
51 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 12.64 µg/m³
  • PM10: 19.71 µg/m³
  • O3: 0.041 ppm
  • NO2: 2.6 ppb
  • SO2: 0.3 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

11 PM
52 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 13.15 µg/m³
  • PM10: 20.13 µg/m³
  • O3: 0.038 ppm
  • NO2: 2.6 ppb
  • SO2: 0.3 ppb
  • CO: 0.12 ppm

Health Recommendations:

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