Hourly Weather | Today Thursday, December 4, 2025
Worcester, Massachusetts
6 AM
Cloudy Night
27°
Feels Like 19°
0
Humidity: 78%
Wind: 8 mph
UV Index: 0
7 AM
Cloudy Weather
25°
Feels Like 12°
25
Humidity: 92%
Wind: 10 mph
UV Index: 0
8 AM
Cloudy Weather
27°
Feels Like 14°
25
Humidity: 88%
Wind: 12 mph
UV Index: 0
9 AM
Cloudy Weather
28°
Feels Like 18°
31
Humidity: 82%
Wind: 13 mph
UV Index: 1
10 AM
Cloudy Weather
30°
Feels Like 19°
47
Humidity: 77%
Wind: 14 mph
UV Index: 1
11 AM
Snowy Weather
34°
Feels Like 19°
51
Humidity: 72%
Wind: 15 mph
UV Index: 1
12 PM
Cloudy Weather
36°
Feels Like 23°
43
Humidity: 65%
Wind: 16 mph
UV Index: 1
1 PM
Snowy Weather
34°
Feels Like 19°
61
Humidity: 68%
Wind: 16 mph
UV Index: 1
2 PM
Snowy Weather
34°
Feels Like 19°
54
Humidity: 62%
Wind: 17 mph
UV Index: 1
3 PM
Cloudy Weather
34°
Feels Like 18°
49
Humidity: 59%
Wind: 20 mph
UV Index: 1
4 PM
Cloudy Weather
28°
Feels Like 10°
34
Humidity: 61%
Wind: 21 mph
UV Index: 0
5 PM
Cloudy Night
27°
Feels Like
34
Humidity: 61%
Wind: 20 mph
UV Index: 0
6 PM
Cloudy Night
23°
Feels Like
22
Humidity: 59%
Wind: 18 mph
UV Index: 0
7 PM
Night
19°
Feels Like
0
Humidity: 58%
Wind: 17 mph
UV Index: 0
8 PM
Night
18°
Feels Like -2°
0
Humidity: 56%
Wind: 17 mph
UV Index: 0
9 PM
Night
16°
Feels Like -4°
0
Humidity: 52%
Wind: 16 mph
UV Index: 0
10 PM
Night
14°
Feels Like -6°
0
Humidity: 49%
Wind: 15 mph
UV Index: 0
11 PM
Night
12°
Feels Like -6°
0
Humidity: 50%
Wind: 14 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

6 AM
65 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 19.06 µg/m³
  • PM10: 24.72 µg/m³
  • O3: 0.015 ppm
  • NO2: 18.2 ppb
  • SO2: 3.5 ppb
  • CO: 0.26 ppm

Health Recommendations:

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

7 AM
65 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 18.94 µg/m³
  • PM10: 24.32 µg/m³
  • O3: 0.016 ppm
  • NO2: 17.2 ppb
  • SO2: 3.5 ppb
  • CO: 0.25 ppm

Health Recommendations:

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

8 AM
64 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 18.36 µg/m³
  • PM10: 23.59 µg/m³
  • O3: 0.017 ppm
  • NO2: 17.5 ppb
  • SO2: 3.5 ppb
  • CO: 0.25 ppm

Health Recommendations:

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

9 AM
61 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 17.13 µg/m³
  • PM10: 22.3 µg/m³
  • O3: 0.019 ppm
  • NO2: 17.2 ppb
  • SO2: 3.4 ppb
  • CO: 0.25 ppm

Health Recommendations:

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

10 AM
58 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 15.52 µg/m³
  • PM10: 20.67 µg/m³
  • O3: 0.022 ppm
  • NO2: 16.6 ppb
  • SO2: 3.1 ppb
  • CO: 0.25 ppm

Health Recommendations:

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

11 AM
51 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 12.64 µg/m³
  • PM10: 16.93 µg/m³
  • O3: 0.025 ppm
  • NO2: 15.2 ppb
  • SO2: 2.7 ppb
  • CO: 0.23 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 11.07 µg/m³
  • PM10: 14.69 µg/m³
  • O3: 0.026 ppm
  • NO2: 14.8 ppb
  • SO2: 2.2 ppb
  • CO: 0.23 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: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 9.78 µg/m³
  • PM10: 12.81 µg/m³
  • O3: 0.025 ppm
  • NO2: 15.1 ppb
  • SO2: 1.9 ppb
  • CO: 0.23 ppm

Health Recommendations:

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

2 PM
33 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 7.87 µg/m³
  • PM10: 10.26 µg/m³
  • O3: 0.025 ppm
  • NO2: 14.7 ppb
  • SO2: 1.6 ppb
  • CO: 0.22 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.58 µg/m³
  • PM10: 7.54 µg/m³
  • O3: 0.026 ppm
  • NO2: 12.8 ppb
  • SO2: 1.3 ppb
  • CO: 0.21 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.45 µg/m³
  • PM10: 4.97 µg/m³
  • O3: 0.026 ppm
  • NO2: 10.1 ppb
  • SO2: 1 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.86 µg/m³
  • PM10: 2.93 µg/m³
  • O3: 0.028 ppm
  • NO2: 7.1 ppb
  • SO2: 0.6 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.94 µg/m³
  • PM10: 1.71 µg/m³
  • O3: 0.034 ppm
  • NO2: 4.8 ppb
  • SO2: 0.4 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.64 µg/m³
  • PM10: 1.24 µg/m³
  • O3: 0.039 ppm
  • NO2: 3.5 ppb
  • SO2: 0.3 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.54 µg/m³
  • PM10: 1.06 µg/m³
  • O3: 0.040 ppm
  • NO2: 2.8 ppb
  • SO2: 0.2 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.52 µg/m³
  • PM10: 1.04 µg/m³
  • O3: 0.040 ppm
  • NO2: 2.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 1.05 µg/m³
  • O3: 0.040 ppm
  • NO2: 2.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 1.03 µg/m³
  • O3: 0.040 ppm
  • NO2: 1.9 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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