Air Quality in Bethlehem, United States
Windy
27.1°C · 32.7% humidity
27.1°
Feels 27.1°
17
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station
Nearby Monitoring Stations
Bethlehem's air quality — share it
AQI Forecast
Calibrated
39
12am
39
39
17
3am
23
35
38
6am
40
42
34
9am
37
37
38
12pm
38
38
39
3pm
39
39
39
6pm
39
39
39
9pm
37
37
Station readings
51
60
62
CAMS model
adj +12
27
27
27
27
27
34
34
34
34
25
27
27
27
27
27
27
27
27
27
27
27
27
25
25
Air Quality Index Trend
43h · 1 stnBethlehem's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.
32.7%
Humidity
43.1 km/h
Wind WNW
1011.1 hPa
Pressure
1.4
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5
4.0 µg/m³
PM10▲
20.55 µg/m³
050100150200300500
What is the weather forecast for Bethlehem?
Temperature & Precipitation
PM2.5 Trend
43h · 1 stationPM2.54.0 µg/m³
✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX1.4
Low
Station readings (1 station within 25 km)
4.0
Median
4.0
Average
4.0
Low
4.0
High
PM2.5 µg/m³ · Model: 10.0 · Bias: +6.0
What is the 7-day forecast for Bethlehem?
08-03
27.1° 19.8°
17.56 mm
08-04
35.8° 18.1°
08-05
31.2° 19.2°
0.44 mm
08-06
28.3° 16.2°
08-07
30.6° 18.5°
3.0 mm
08-08
36.1° 18.9°
0.13 mm
08-09
33.2° 21.0°
Both models agree
Avg diff: 3.7°C
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Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-08-08T07:24 UTC.