Air Quality in Bethlehem, United States
Drizzle
11.6°C · 78.1% humidity
11.6°
Feels 11.6°
145
Unhealthy for sensitive groups
Sensitive groups should reduce prolonged outdoor exertion.
1 station
Nearby Monitoring Stations
AQI Forecast
Calibrated
137
7pm
137
137
145
10pm
143
141
140
1am
139
139
138
4am
138
145
144
7am
144
137
137
10am
137
137
137
1pm
137
144
144
4pm
144
144
Station readings
155
119
CAMS model
adj +110
27
27
27
27
27
27
27
27
27
27
27
34
34
34
27
27
27
27
27
27
34
34
34
34
Air Quality Index Trend
28h · 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. Current PM2.5 concentration in Bethlehem is 3.5× the WHO 24-hour guideline of 15 µg/m³.
78.1%
Humidity
50.1 km/h
Wind WSW
1001.4 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
53.16 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for Bethlehem?
Temperature & Precipitation
PM2.5 Trend
28h · 1 stationPM2.553.16 µg/m³
×3.5 WHO
Unhealthy for sensitive groups
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
Station readings (1 station within 25 km)
53.16
Median
53.16
Average
53.16
Low
53.16
High
PM2.5 µg/m³ · Model: 6.5 · Bias: -46.7
What is the 7-day forecast for Bethlehem?
06-09
30.2° 10.7°
0.13 mm
06-10
21.8° 17.7°
13.94 mm
06-11
23.7° 12.0°
06-12
20.4° 14.8°
37.38 mm
06-13
28.4° 15.8°
0.25 mm
06-14
22.3° 16.4°
5.94 mm
06-15
23.0° 12.1°
Both models agree
Avg diff: 6.9°C
Where are air quality stations near Bethlehem?
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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 2026-06-09T02:11 UTC.