Today | Weather | Tuesday, September 16, 2025

Weather in Philadelphia, Pennsylvania

01:27 AM

Now

64° F

Feels Like 63°

Precipitation 0 %

Wind 7 mph

Humidity 88 %

Today

Day 75°

Night 63°

Precipitation 49 %

Wind 16

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.

Philadelphia Weather Forecast Updated

Last updated on September 16, 2025 12:24 AM

Weather Forecast History

Last Year's Weather on This Day (September 16, 2024)

Day

77°

Night

61°

Wind

8 mph

UV Index

Precipitation

Air quality in Philadelphia

NOW

57 AQI

Moderate air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 9.94 µg/m³

PM10 10.95 µg/m³

O₃ 36.98 ppb

NO₂ 6.10 ppb

SO₂ 1.09 ppb

CO 184.86 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