Hourly Weather | Today Monday, April 27, 2026
Bethlehem, Pennsylvania
9 PM
Night
59°
Feels Like 57°
0
Humidity: 56%
UV Index: 0
Wind: 7 mph
10 PM
Night
55°
Feels Like 54°
0
Humidity: 58%
UV Index: 0
Wind: 6 mph
11 PM
Cloudy Night
54°
Feels Like 52°
0
Humidity: 62%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 12.18 µg/m³
  • PM10: 15.14 µg/m³
  • O3: 0.055 ppm
  • NO2: 4.4 ppb
  • SO2: 0.9 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 11.33 µg/m³
  • PM10: 14.32 µg/m³
  • O3: 0.053 ppm
  • NO2: 4.1 ppb
  • SO2: 0.8 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 10.5 µg/m³
  • PM10: 13.23 µg/m³
  • O3: 0.053 ppm
  • NO2: 3.6 ppb
  • SO2: 0.7 ppb
  • CO: 0.16 ppm

Health Recommendations:

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