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Hourly Weather | Today › Tuesday, July 14, 2026
Active Weather Warnings
Boston, Massachusetts
1 PM
Cloudy Weather
90°
Feels Like 97°
0
Humidity: 45%
UV Index: 10
Wind: 13 mph
2 PM
Cloudy Weather
91°
Feels Like 97°
0
Humidity: 42%
UV Index: 9
Wind: 15 mph
3 PM
Cloudy Weather
93°
Feels Like 97°
0
Humidity: 41%
UV Index: 7
Wind: 16 mph
4 PM
Cloudy Weather
93°
Feels Like 97°
0
Humidity: 40%
UV Index: 5
Wind: 17 mph
5 PM
Cloudy Weather
93°
Feels Like 93°
0
Humidity: 43%
UV Index: 3
Wind: 17 mph
6 PM
Cloudy Weather
91°
Feels Like 91°
0
Humidity: 46%
UV Index: 2
Wind: 17 mph
7 PM
Cloudy Weather
90°
Feels Like 90°
0
Humidity: 50%
UV Index: 1
Wind: 16 mph
8 PM
Cloudy Weather
88°
Feels Like 90°
0
Humidity: 53%
UV Index: 0
Wind: 13 mph
9 PM
Cloudy Night
84°
Feels Like 86°
0
Humidity: 59%
UV Index: 0
Wind: 12 mph
10 PM
Cloudy Night
84°
Feels Like 84°
0
Humidity: 62%
UV Index: 0
Wind: 12 mph
11 PM
Cloudy Night
82°
Feels Like 84°
0
Humidity: 66%
UV Index: 0
Wind: 10 mph

Hourly Air Quality Forecast - AQI (US EPA)

1 PM
108 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 18.07 µg/m³
  • PM10: 24.56 µg/m³
  • O3: 0.073 ppm
  • NO2: 1.2 ppb
  • SO2: 1.3 ppb
  • CO: 0.14 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

2 PM
137 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 21.98 µg/m³
  • PM10: 29.26 µg/m³
  • O3: 0.081 ppm
  • NO2: 1 ppb
  • SO2: 1.3 ppb
  • CO: 0.14 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

3 PM
142 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 21.45 µg/m³
  • PM10: 28.94 µg/m³
  • O3: 0.083 ppm
  • NO2: 0.8 ppb
  • SO2: 1.2 ppb
  • CO: 0.14 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

4 PM
137 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 19.46 µg/m³
  • PM10: 27.18 µg/m³
  • O3: 0.081 ppm
  • NO2: 0.8 ppb
  • SO2: 1 ppb
  • CO: 0.13 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

5 PM
129 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 17.31 µg/m³
  • PM10: 25.42 µg/m³
  • O3: 0.079 ppm
  • NO2: 0.8 ppb
  • SO2: 0.9 ppb
  • CO: 0.12 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

6 PM
120 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 15.48 µg/m³
  • PM10: 24.22 µg/m³
  • O3: 0.076 ppm
  • NO2: 1.1 ppb
  • SO2: 0.8 ppb
  • CO: 0.12 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

7 PM
110 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 14.19 µg/m³
  • PM10: 23.6 µg/m³
  • O3: 0.073 ppm
  • NO2: 1.5 ppb
  • SO2: 0.8 ppb
  • CO: 0.12 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

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

Pollutant Concentrations:

  • PM2.5: 13.24 µg/m³
  • PM10: 22.92 µg/m³
  • O3: 0.070 ppm
  • NO2: 1.9 ppb
  • SO2: 0.8 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.

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

Pollutant Concentrations:

  • PM2.5: 12.29 µg/m³
  • PM10: 21.98 µg/m³
  • O3: 0.066 ppm
  • NO2: 2.1 ppb
  • SO2: 0.9 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.

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

Pollutant Concentrations:

  • PM2.5: 11.6 µg/m³
  • PM10: 20.93 µg/m³
  • O3: 0.062 ppm
  • NO2: 2.2 ppb
  • SO2: 0.9 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
62 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 11.16 µg/m³
  • PM10: 19.74 µg/m³
  • O3: 0.058 ppm
  • NO2: 2.3 ppb
  • SO2: 1 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.

Current Real-Time Air Quality Report

Weather Alerts and Warnings for Boston

Moderate Expected Likely

Heat Advisory

Heat Advisory issued July 14 at 1:51AM EDT until July 15 at 8:00PM EDT by NWS Boston/Norton MA
Jul 14, 11:00 AM → Jul 15, 8:00 PM
WHAT: Heat index values up to 101 expected.

WHERE: Portions of northern Connecticut, central, eastern,
northeastern, southeastern, and western Massachusetts, and
northern and southern Rhode Island.

WHEN: From 11 AM this morning to 8 PM EDT Wednesday.

IMPACTS: Hot temperatures and high humidity may cause heat
illnesses.
+ Read More
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.
Updated: Jul 14, 11:50 AM Source: NWS Alert

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