Hourly Weather | Today Thursday, March 19, 2026
Newton, Massachusetts
2 AM
Cloudy Night
32°
Feels Like 27°
0
Humidity: 76%
UV Index: 0
Wind: 7 mph
3 AM
Cloudy Night
32°
Feels Like 27°
0
Humidity: 79%
UV Index: 0
Wind: 7 mph
4 AM
Cloudy Night
30°
Feels Like 28°
0
Humidity: 80%
UV Index: 0
Wind: 6 mph
5 AM
Cloudy Night
30°
Feels Like 28°
0
Humidity: 81%
UV Index: 0
Wind: 6 mph
6 AM
Cloudy Night
28°
Feels Like 27°
0
Frost Risk: 87%
Humidity: 88%
UV Index: 0
Wind: 6 mph
7 AM
Cloudy Weather
30°
Feels Like 28°
0
Humidity: 85%
UV Index: 0
Wind: 6 mph
8 AM
Cloudy Weather
32°
Feels Like 30°
0
Humidity: 80%
UV Index: 1
Wind: 6 mph
9 AM
Cloudy Weather
36°
Feels Like 37°
0
Humidity: 70%
UV Index: 2
Wind: 6 mph
10 AM
Cloudy Weather
41°
Feels Like 43°
0
Humidity: 60%
UV Index: 3
Wind: 6 mph
11 AM
Cloudy Weather
45°
Feels Like 48°
0
Humidity: 54%
UV Index: 4
Wind: 7 mph
12 PM
Cloudy Weather
46°
Feels Like 52°
0
Humidity: 48%
UV Index: 4
Wind: 7 mph
1 PM
Cloudy Weather
50°
Feels Like 52°
0
Humidity: 42%
UV Index: 5
Wind: 8 mph
2 PM
Cloudy Weather
52°
Feels Like 46°
0
Humidity: 38%
UV Index: 3
Wind: 17 mph
3 PM
Cloudy Weather
54°
Feels Like 48°
0
Humidity: 37%
UV Index: 2
Wind: 17 mph
4 PM
Cloudy Weather
54°
Feels Like 45°
0
Humidity: 41%
UV Index: 2
Wind: 18 mph
5 PM
Cloudy Weather
52°
Feels Like 43°
0
Humidity: 46%
UV Index: 1
Wind: 20 mph
6 PM
Cloudy Weather
48°
Feels Like 39°
0
Humidity: 51%
UV Index: 1
Wind: 20 mph
7 PM
Cloudy Night
48°
Feels Like 36°
1
Humidity: 55%
UV Index: 0
Wind: 20 mph
8 PM
Cloudy Weather
45°
Feels Like 34°
49
Humidity: 61%
UV Index: 0
Wind: 20 mph
9 PM
Cloudy Weather
43°
Feels Like 30°
49
Humidity: 69%
UV Index: 0
Wind: 20 mph
10 PM
Rainy Weather
43°
Feels Like 28°
56
Humidity: 73%
UV Index: 0
Wind: 18 mph
11 PM
Rainy Weather
43°
Feels Like 27°
58
Humidity: 79%
UV Index: 0
Wind: 18 mph

Hourly Air Quality Forecast - AQI (US EPA)

2 AM
42 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.73 µg/m³
  • PM10: 3.44 µg/m³
  • O3: 0.045 ppm
  • NO2: 2.6 ppb
  • SO2: 0.3 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

3 AM
42 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.73 µg/m³
  • PM10: 3.42 µg/m³
  • O3: 0.045 ppm
  • NO2: 2.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.73 µg/m³
  • PM10: 3.4 µg/m³
  • O3: 0.045 ppm
  • NO2: 2 ppb
  • SO2: 0.3 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.71 µg/m³
  • PM10: 3.38 µg/m³
  • O3: 0.046 ppm
  • NO2: 1.8 ppb
  • SO2: 0.3 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.69 µg/m³
  • PM10: 3.37 µg/m³
  • O3: 0.046 ppm
  • NO2: 1.7 ppb
  • SO2: 0.3 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.67 µg/m³
  • PM10: 3.37 µg/m³
  • O3: 0.045 ppm
  • NO2: 1.8 ppb
  • SO2: 0.3 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.75 µg/m³
  • PM10: 3.55 µg/m³
  • O3: 0.044 ppm
  • NO2: 2.4 ppb
  • SO2: 0.3 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.61 µg/m³
  • PM10: 3.44 µg/m³
  • O3: 0.045 ppm
  • NO2: 2.9 ppb
  • SO2: 0.3 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.21 µg/m³
  • PM10: 3.01 µg/m³
  • O3: 0.047 ppm
  • NO2: 2.6 ppb
  • SO2: 0.3 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.71 µg/m³
  • PM10: 2.45 µg/m³
  • O3: 0.049 ppm
  • NO2: 2 ppb
  • SO2: 0.3 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

12 PM
57 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.31 µg/m³
  • PM10: 1.9 µg/m³
  • O3: 0.056 ppm
  • NO2: 0.6 ppb
  • SO2: 0.3 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

1 PM
62 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.44 µg/m³
  • PM10: 2.03 µg/m³
  • O3: 0.058 ppm
  • NO2: 0.5 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

2 PM
65 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.58 µg/m³
  • PM10: 2.19 µg/m³
  • O3: 0.059 ppm
  • NO2: 0.4 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

3 PM
67 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.71 µg/m³
  • PM10: 2.35 µg/m³
  • O3: 0.060 ppm
  • NO2: 0.4 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

4 PM
67 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.82 µg/m³
  • PM10: 2.49 µg/m³
  • O3: 0.059 ppm
  • NO2: 0.4 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

5 PM
66 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.84 µg/m³
  • PM10: 2.54 µg/m³
  • O3: 0.059 ppm
  • NO2: 0.5 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

6 PM
64 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.85 µg/m³
  • PM10: 2.58 µg/m³
  • O3: 0.058 ppm
  • NO2: 0.8 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

7 PM
58 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.88 µg/m³
  • PM10: 2.65 µg/m³
  • O3: 0.057 ppm
  • NO2: 1.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

8 PM
55 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.91 µg/m³
  • PM10: 2.72 µg/m³
  • O3: 0.055 ppm
  • NO2: 1.5 ppb
  • SO2: 0.2 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

9 PM
52 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.89 µg/m³
  • PM10: 2.74 µg/m³
  • O3: 0.055 ppm
  • NO2: 1.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

10 PM
51 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.85 µg/m³
  • PM10: 2.72 µg/m³
  • O3: 0.054 ppm
  • NO2: 1.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.81 µg/m³
  • PM10: 2.69 µg/m³
  • O3: 0.054 ppm
  • NO2: 1.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.14 ppm

Health Recommendations:

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