Hourly Weather | Today Monday, September 21, 2026
Medford, Massachusetts
3 PM
Cloudy Weather
70°
Feels Like 72°
0
Humidity: 49%
UV Index: 4
Wind: 10 mph
4 PM
Cloudy Weather
68°
Feels Like 68°
0
Humidity: 51%
UV Index: 2
Wind: 9 mph
5 PM
Cloudy Weather
64°
Feels Like 64°
0
Humidity: 55%
UV Index: 2
Wind: 8 mph
6 PM
Cloudy Weather
63°
Feels Like 63°
0
Humidity: 61%
UV Index: 1
Wind: 7 mph
7 PM
Cloudy Night
61°
Feels Like 61°
0
Humidity: 68%
UV Index: 0
Wind: 6 mph
8 PM
Cloudy Night
57°
Feels Like 57°
0
Humidity: 79%
UV Index: 0
Wind: 5 mph
9 PM
Cloudy Night
55°
Feels Like 55°
0
Humidity: 86%
UV Index: 0
Wind: 5 mph
10 PM
Cloudy Night
54°
Feels Like 54°
0
Humidity: 90%
UV Index: 0
Wind: 5 mph
11 PM
Cloudy Night
52°
Feels Like 52°
0
Humidity: 95%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 3.57 µg/m³
  • PM10: 4.39 µg/m³
  • O3: 0.048 ppm
  • NO2: 1 ppb
  • SO2: 0.4 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.78 µg/m³
  • PM10: 4.53 µg/m³
  • O3: 0.049 ppm
  • NO2: 1 ppb
  • SO2: 0.4 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.74 µg/m³
  • PM10: 4.45 µg/m³
  • O3: 0.049 ppm
  • NO2: 1.2 ppb
  • SO2: 0.4 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.52 µg/m³
  • PM10: 4.23 µg/m³
  • O3: 0.047 ppm
  • NO2: 1.8 ppb
  • SO2: 0.4 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.34 µg/m³
  • PM10: 4.09 µg/m³
  • O3: 0.044 ppm
  • NO2: 2.7 ppb
  • SO2: 0.4 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.08 µg/m³
  • PM10: 3.88 µg/m³
  • O3: 0.041 ppm
  • NO2: 3 ppb
  • SO2: 0.5 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.73 µg/m³
  • PM10: 3.54 µg/m³
  • O3: 0.038 ppm
  • NO2: 2.9 ppb
  • SO2: 0.4 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.5 µg/m³
  • PM10: 3.34 µg/m³
  • O3: 0.037 ppm
  • NO2: 2.7 ppb
  • SO2: 0.4 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.47 µg/m³
  • PM10: 3.34 µg/m³
  • O3: 0.035 ppm
  • NO2: 2.6 ppb
  • SO2: 0.4 ppb
  • CO: 0.18 ppm

Health Recommendations:

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