Today | Weather | Friday, May 15, 2026

Weather in Philadelphia, Pennsylvania

12:32 AM
Now
Night
59° F
Feels Like 59°
Precipitation 0 %
Wind 5 mph
Humidity 68 %
Today
Cloudy Weather
Day 70°
Night 54°
Precipitation 7 %
Wind 12 mph
UV Index (0 - 11+) 10

Warning: High UV Index Today: 10

High risk of harm from unprotected sun exposure. Take precautions: wear a hat, sunglasses, and apply sunscreen regularly if you’ll be outdoors for extended periods.

Philadelphia Weather Forecast Updated

57 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (May 15, 2025)
Stormy Weather

Day

77°

Night

61°

Wind

4 mph

UV Index

3

Precipitation

40 %

Air Quality in Philadelphia

NOW
32 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 0.72 µg/m³
PM10 1.38 µg/m³
O3 0.035 ppm
NO2 2.3 ppb
SO2 0.7 ppb
CO 0.12 ppm
NH3 2.66 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)
PM2.50.72 µg/m³
PM101.38 µg/m³
O368.58 µg/m³
NO24.36 µg/m³
SO21.71 µg/m³
CO143.02 µg/m³
NH32.66 µg/m³
NO0 µg/m³