Air Quality in Lancaster, United States
Clear
30.8°C · 47.1% humidity
30.8°
Feels 33.7°
69
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
Calibrated model
Nearby Monitoring Stations
Lancaster's air quality — share it
AQI Forecast
34
1pm
34
34
69
4pm
59
45
40
7pm
36
32
30
10pm
27
26
26
1am
25
25
26
4am
25
25
25
7am
25
24
24
10am
24
24
Air Quality Index Trend
11h · 1 stnLancaster'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 Lancaster is 1.4× the WHO 24-hour guideline of 15 µg/m³.
47.1%
Humidity
24.6 km/h
Wind N
1012.0 hPa
Pressure
10.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
20.79 µg/m³
PM10
84.3 µg/m³
050100150200300500
What is the weather forecast for Lancaster?
Temperature & Precipitation
PM2.5 Trend
11h · 1 stationPM2.520.79 µg/m³
×1.4 WHO
Moderate
PM1084.3 µg/m³
Moderate
UV INDEX10.9
Extreme
What is the 7-day forecast for Lancaster?
07-21
30.8° 19.6°
0.13 mm
07-22
23.7° 19.1°
1.19 mm
07-23
21.7° 16.6°
07-24
25.2° 13.9°
1.44 mm
07-25
21.7° 16.5°
3.0 mm
07-26
26.7° 17.2°
20.0 mm
07-27
26.4° 20.3°
2.69 mm
Both models agree
Avg diff: 3.3°C
What cities are near Lancaster?
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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 2026-07-21T20:11 UTC.