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Today | Weather | Wednesday, October 22, 2025

Weather in Lancaster, Pennsylvania

12:23 AM
Now
Rainy Night
55° F
Feels Like 52°
Precipitation 52 %
Wind 4 mph
Humidity 86 %
Today
Cloudy Weather
Day 59°
Night 43°
Precipitation 10 %
Wind 14 mph
UV Index (0 - 11+) 11

Warning: Extreme UV Index Today: 11+

Overexposure to the sun's harmful UV rays can cause sunburn and increase the risk of developing skin cancer, including melanoma. Protect yourself by wearing clothing that covers your skin, sunglasses, and a hat. Apply a broad-spectrum sunscreen with an SPF of 30 or higher every two hours, even on cloudy days. Minimize direct sun exposure during peak hours (10 AM to 4 PM) to reduce the risk.

Lancaster Weather Forecast Updated

Weather Forecast History

Last Year's Weather on This Day (October 22, 2024)

Day

84°

Night

46°

Air Quality in Lancaster

NOW
32 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 7.45 µg/m³
PM10 9.02 µg/m³
O3 0.035 ppm
NO2 6.4 ppb
SO2 0.7 ppb
CO 0.15 ppm
NH3 0.51 µg/m³
NO 0 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)
PM2.5 – 7.45 µg/m³
PM10 – 9.02 µg/m³
O3 – 67.94 µg/m³
NO2 – 12.02 µg/m³
SO2 – 1.78 µg/m³
CO – 172.89 µg/m³
NH3 – 0.51 µg/m³
NO – 0 µg/m³
View Hourly Air Quality Forecast