• Wed

    Sep 9

    81°Lo 60°

    A thunderstorm possible

    Very Good for lawn mowing
    • Hours of Precip
      0
    • Precip
      0%
    • Hi
      RealFeel
      83°
    more
  • Thu

    Sep 10

    81°Lo 60°

    Clouds and sun

    Excellent for lawn mowing
    • Hours of Precip
      0
    • Precip
      0%
    • Hi
      RealFeel
      84°
    more
  • Fri

    Sep 11

    80°Lo 55°

    Abundant sunshine

    Excellent for lawn mowing
    • Hours of Precip
      0
    • Precip
      0%
    • Hi
      RealFeel
      85°
    more
  • Sat

    Sep 12

    79°Lo 57°

    Mainly cloudy

    Excellent for lawn mowing
    • Hours of Precip
      1.5
    • Precip
      60%
    • Hi
      RealFeel
      81°
  • Sun

    Sep 13

    82°Lo 65°

    Brilliant sunshine

    Excellent for lawn mowing
    • Hours of Precip
      0
    • Precip
      10%
    • Hi
      RealFeel
      82°
    more
Next Previous
Hi 79° RealFeel® 81° Precipitation 4%

Day

N

E

S

W

  • SW 5 mph
  • Gusts: 14 mph

Mainly cloudy

  • Max UV Index: 5 (Moderate)
  • Thunderstorms: 0%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs
Lo 57° RealFeel® 55° Precipitation 60%

Night

N

E

S

W

  • SSW 7 mph
  • Gusts: 16 mph

Mostly cloudy with a couple of showers, mainly early

  • Max UV Index: N/A
  • Thunderstorms: 20%
  • Precipitation: 0.05 in
  • Rain: 0.05 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 1.5 hrs
  • Hours of Rain: 1.5 hrs

Temperature History - Sep 12

more Historical Weather Data >
  Today Normal Record 9/12/2014
High 79° 78° 95° (1895) 77°
Low 57° 58° 40° (1985) 57°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:36 AM with 12:37 of sunlight, then sets at 7:13 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 5:57 AM with 12:56 of moolight, then sets at 6:53 PM

Princeton Weather Report

Philly: Sizzling Heat Wave to Start September

August 30, 2015; 8:14 PM ET

A push of summery heat and humidity will arrive in Philadelphia this week as September begins more >

Why Do Leaves Change Color?

Sep 20, 2011; 5:00 AM ET Why do leaves change from green to beautiful shades of red, orange and yellow in the fall?