Hourly Weather | Today Monday, September 21, 2026
Bethlehem, Pennsylvania
3 PM
Cloudy Weather
68°
Feels Like 68°
34
Humidity: 59%
UV Index: 2
Wind: 8 mph
4 PM
Cloudy Weather
70°
Feels Like 68°
37
Humidity: 59%
UV Index: 1
Wind: 8 mph
5 PM
Cloudy Weather
68°
Feels Like 66°
47
Humidity: 60%
UV Index: 1
Wind: 7 mph
6 PM
Rainy Weather
66°
Feels Like 63°
51
Humidity: 63%
UV Index: 0
Wind: 7 mph
7 PM
Cloudy Weather
66°
Feels Like 63°
47
Humidity: 68%
UV Index: 0
Wind: 6 mph
8 PM
Cloudy Weather
63°
Feels Like 63°
47
Humidity: 77%
UV Index: 0
Wind: 6 mph
9 PM
Rainy Weather
61°
Feels Like 57°
51
Humidity: 83%
UV Index: 0
Wind: 6 mph
10 PM
Cloudy Weather
61°
Feels Like 59°
47
Humidity: 84%
UV Index: 0
Wind: 6 mph
11 PM
Cloudy Weather
61°
Feels Like 59°
47
Humidity: 84%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 3.63 µg/m³
  • PM10: 4.45 µg/m³
  • O3: 0.035 ppm
  • NO2: 3 ppb
  • SO2: 0.8 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.14 µg/m³
  • PM10: 5.03 µg/m³
  • O3: 0.038 ppm
  • NO2: 3.1 ppb
  • SO2: 0.9 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.56 µg/m³
  • PM10: 5.55 µg/m³
  • O3: 0.038 ppm
  • NO2: 3.7 ppb
  • SO2: 0.9 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.97 µg/m³
  • PM10: 6.13 µg/m³
  • O3: 0.038 ppm
  • NO2: 4.8 ppb
  • SO2: 1 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.53 µg/m³
  • PM10: 6.91 µg/m³
  • O3: 0.037 ppm
  • NO2: 5.7 ppb
  • SO2: 1.1 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.16 µg/m³
  • PM10: 7.83 µg/m³
  • O3: 0.036 ppm
  • NO2: 6 ppb
  • SO2: 1.2 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.59 µg/m³
  • PM10: 8.26 µg/m³
  • O3: 0.035 ppm
  • NO2: 6 ppb
  • SO2: 1.3 ppb
  • CO: 0.21 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.8 µg/m³
  • PM10: 8.36 µg/m³
  • O3: 0.034 ppm
  • NO2: 5.9 ppb
  • SO2: 1.2 ppb
  • CO: 0.21 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.72 µg/m³
  • PM10: 8.27 µg/m³
  • O3: 0.033 ppm
  • NO2: 5.8 ppb
  • SO2: 1 ppb
  • CO: 0.21 ppm

Health Recommendations:

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