Hourly Weather | Today Thursday, February 26, 2026
Bethlehem, Pennsylvania
6 AM
Night
28°
Feels Like 25°
13
Frost Risk: 88%
Humidity: 74%
UV Index: 0
Wind: 7 mph
7 AM
Cloudy Weather
28°
Feels Like 27°
0
Humidity: 77%
UV Index: 0
Wind: 6 mph
8 AM
Cloudy Weather
30°
Feels Like 28°
0
Humidity: 73%
UV Index: 1
Wind: 6 mph
9 AM
Cloudy Weather
34°
Feels Like 30°
0
Humidity: 65%
UV Index: 1
Wind: 7 mph
10 AM
Cloudy Weather
37°
Feels Like 34°
0
Humidity: 58%
UV Index: 1
Wind: 8 mph
11 AM
Cloudy Weather
39°
Feels Like 36°
0
Humidity: 54%
UV Index: 1
Wind: 8 mph
12 PM
Cloudy Weather
39°
Feels Like 37°
0
Humidity: 51%
UV Index: 1
Wind: 8 mph
1 PM
Cloudy Weather
39°
Feels Like 39°
0
Humidity: 50%
UV Index: 1
Wind: 7 mph
2 PM
Cloudy Weather
41°
Feels Like 39°
0
Humidity: 49%
UV Index: 1
Wind: 6 mph
3 PM
Cloudy Weather
43°
Feels Like 43°
0
Humidity: 48%
UV Index: 1
Wind: 5 mph
4 PM
Cloudy Weather
41°
Feels Like 41°
0
Humidity: 51%
UV Index: 0
Wind: 5 mph
5 PM
Cloudy Weather
39°
Feels Like 39°
0
Humidity: 54%
UV Index: 0
Wind: 5 mph
6 PM
Cloudy Weather
37°
Feels Like 36°
0
Humidity: 58%
UV Index: 0
Wind: 5 mph
7 PM
Cloudy Weather
37°
Feels Like 36°
0
Humidity: 61%
UV Index: 0
Wind: 5 mph
8 PM
Cloudy Night
34°
Feels Like 34°
0
Humidity: 66%
UV Index: 0
Wind: 5 mph
9 PM
Cloudy Night
32°
Feels Like 30°
0
Humidity: 69%
UV Index: 0
Wind: 5 mph
10 PM
Cloudy Night
30°
Feels Like 28°
0
Humidity: 71%
UV Index: 0
Wind: 5 mph
11 PM
Cloudy Night
28°
Feels Like 28°
0
Frost Risk: 60%
Humidity: 71%
UV Index: 0
Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 12.5 µg/m³
  • PM10: 16.3 µg/m³
  • O3: 0.032 ppm
  • NO2: 5.2 ppb
  • SO2: 1 ppb
  • CO: 0.21 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 13.54 µg/m³
  • PM10: 17.37 µg/m³
  • O3: 0.033 ppm
  • NO2: 5.9 ppb
  • SO2: 1.3 ppb
  • CO: 0.21 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 14.12 µg/m³
  • PM10: 17.9 µg/m³
  • O3: 0.034 ppm
  • NO2: 7.3 ppb
  • SO2: 1.6 ppb
  • CO: 0.22 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 14.49 µg/m³
  • PM10: 18.73 µg/m³
  • O3: 0.034 ppm
  • NO2: 8.6 ppb
  • SO2: 1.3 ppb
  • CO: 0.24 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 15.02 µg/m³
  • PM10: 19.91 µg/m³
  • O3: 0.035 ppm
  • NO2: 8.3 ppb
  • SO2: 1.3 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
59 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 16.24 µg/m³
  • PM10: 21.99 µg/m³
  • O3: 0.036 ppm
  • NO2: 9.2 ppb
  • SO2: 1.6 ppb
  • CO: 0.27 ppm

Health Recommendations:

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

12 PM
63 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 18.11 µg/m³
  • PM10: 24.82 µg/m³
  • O3: 0.037 ppm
  • NO2: 10 ppb
  • SO2: 1.9 ppb
  • CO: 0.28 ppm

Health Recommendations:

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

1 PM
68 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 20.53 µg/m³
  • PM10: 28.11 µg/m³
  • O3: 0.037 ppm
  • NO2: 11.4 ppb
  • SO2: 2.1 ppb
  • CO: 0.30 ppm

Health Recommendations:

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

2 PM
74 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 23.23 µg/m³
  • PM10: 31.65 µg/m³
  • O3: 0.037 ppm
  • NO2: 14 ppb
  • SO2: 2.3 ppb
  • CO: 0.33 ppm

Health Recommendations:

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

3 PM
78 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 25.31 µg/m³
  • PM10: 34.35 µg/m³
  • O3: 0.036 ppm
  • NO2: 16.8 ppb
  • SO2: 2.5 ppb
  • CO: 0.35 ppm

Health Recommendations:

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

4 PM
82 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 26.9 µg/m³
  • PM10: 36.44 µg/m³
  • O3: 0.033 ppm
  • NO2: 20.5 ppb
  • SO2: 2.7 ppb
  • CO: 0.37 ppm

Health Recommendations:

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

5 PM
85 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 28.61 µg/m³
  • PM10: 38.7 µg/m³
  • O3: 0.029 ppm
  • NO2: 25.6 ppb
  • SO2: 2.9 ppb
  • CO: 0.39 ppm

Health Recommendations:

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

6 PM
90 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 30.75 µg/m³
  • PM10: 41.6 µg/m³
  • O3: 0.022 ppm
  • NO2: 32.7 ppb
  • SO2: 3.1 ppb
  • CO: 0.43 ppm

Health Recommendations:

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

7 PM
96 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 33.36 µg/m³
  • PM10: 45.07 µg/m³
  • O3: 0.017 ppm
  • NO2: 36 ppb
  • SO2: 3.2 ppb
  • CO: 0.46 ppm

Health Recommendations:

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

8 PM
102 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 36.04 µg/m³
  • PM10: 48.43 µg/m³
  • O3: 0.012 ppm
  • NO2: 37.1 ppb
  • SO2: 3 ppb
  • CO: 0.48 ppm

Health Recommendations:

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

9 PM
109 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 39.01 µg/m³
  • PM10: 52.21 µg/m³
  • O3: 0.009 ppm
  • NO2: 38.1 ppb
  • SO2: 2.9 ppb
  • CO: 0.50 ppm

Health Recommendations:

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

10 PM
116 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 41.85 µg/m³
  • PM10: 55.87 µg/m³
  • O3: 0.007 ppm
  • NO2: 39.2 ppb
  • SO2: 2.9 ppb
  • CO: 0.52 ppm

Health Recommendations:

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

11 PM
121 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 43.89 µg/m³
  • PM10: 58.33 µg/m³
  • O3: 0.006 ppm
  • NO2: 39.8 ppb
  • SO2: 2.8 ppb
  • CO: 0.54 ppm

Health Recommendations:

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