Today | Weather | Sunday, September 14, 2025

Weather in Allentown, Pennsylvania

11:11 PM

Now

66° F

Feels Like 64°

Precipitation 0 %

Wind 5 mph

Humidity 81 %

Today

Day 82°

Night 57°

Precipitation 25 %

Wind 8

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.

Other:

Sunshine mixing with some overcast skies.

Allentown Weather Forecast Updated

Air quality in Allentown

NOW

58 AQI

Moderate air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 16.11 µg/m³

PM10 18.47 µg/m³

O₃ 29.80 ppb

NO₂ 14.95 ppb

SO₂ 0.89 ppb

CO 349.56 ppb

PM_2.5 – Fine particles <2.5μm

PM₁₀ – Inhalable particles <10μm

O₃ – Ozone

NO₂ – Nitrogen dioxide

SO₂ – Sulfur dioxide

CO – Carbon monoxide

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

View Hourly Air Quality Forecast