Today | Weather | Tuesday, September 1, 2026

Weather in Lancaster, Pennsylvania

11:24 AM
Now
Cloudy Weather
81° F
Feels Like 88°
Precipitation 33 %
Wind 7 mph
UV Index (0 - 11+) 2
Humidity 74 %
Today
Sunny with a Chance of Thunderstorms
Day 90°
Night 70°
Precipitation 60 %
Wind 7 mph
UV Index (0 - 11+) 5

Lancaster Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (September 1, 2025)

Day

81°

Night

52°

Air Quality in Lancaster

NOW
30 AQI
Good air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 7.18 µg/m³
PM10 9.37 µg/m³
O3 0.021 ppm
NO2 7.8 ppb
SO2 0.9 ppb
CO 0.18 ppm
NH3 0.71 µg/m³
NO 2.49 µg/m³
PM2.5 – Fine particles <2.5μm
PM10 – Inhalable particles <10μm
O3 – Ozone
NO2 – Nitrogen dioxide
SO2 – Sulfur dioxide
CO – Carbon monoxide
NH3 – Ammonia
NO – Nitric oxide

Health Recommendations:

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

Show raw pollutant concentrations (µg/m³)
PM2.57.18 µg/m³
PM109.37 µg/m³
O341.32 µg/m³
NO214.77 µg/m³
SO22.45 µg/m³
CO202.93 µg/m³
NH30.71 µg/m³
NO2.49 µg/m³