Today | Weather | Tuesday, January 27, 2026
Active Weather Warnings

Weather in Philadelphia, Pennsylvania

10:17 PM
Now
Night
18° F
Feels Like
Precipitation 0 %
Wind 15 mph
Humidity 64 %
Today
Cloudy Night
Day 25°
Night 14°
Precipitation 2 %
Wind 10 mph

Philadelphia Weather Forecast Updated

32 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (January 27, 2025)
Sunny Weather

Day

46°

Night

30°

Wind

12 mph

UV Index

3

Precipitation

0 %

Air Quality in Philadelphia

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

Pollutant Concentrations:

PM2.5 9.22 µg/m³
PM10 10.83 µg/m³
O3 0.040 ppm
NO2 7.7 ppb
SO2 1.7 ppb
CO 0.20 ppm
NH3 2.14 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)
PM2.59.22 µg/m³
PM1010.83 µg/m³
O378.76 µg/m³
NO214.55 µg/m³
SO24.56 µg/m³
CO223.63 µg/m³
NH32.14 µg/m³
NO0 µg/m³

Weather Alerts and Warnings for Philadelphia

Moderate Expected Likely

Cold Weather Advisory

Cold Weather Advisory issued January 27 at 12:25PM EST until January 28 at 10:00AM EST by NWS Mount Holly NJ
Jan 27, 12:25 PM Jan 28, 10:00 AM
WHAT: Very cold wind chills as low as 8 below.

WHERE: Portions of Delaware, northeast Maryland, southern New
Jersey, and southeast Pennsylvania.

WHEN: Until 10 AM EST Wednesday.

IMPACTS: The cold wind chills as low as 10 below zero could
result in hypothermia if precautions are not taken. Frostbite and
hypothermia will occur if unprotected skin is exposed to these
temperatures.
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Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. Keep pets indoors as much as possible. Make frequent checks on older family, friends, and neighbors. Ensure portable heaters are used correctly. Do not use generators or grills inside.
Updated: Jan 27, 9:44 PM Source: NWS Alert