• Today

    Sep 17

    73°Lo 51°

    Nice with brilliant sunshine

    Excellent for lawn mowing
    • Hours of Precip
      0
    • Precip
      0%
    • Hi
      RealFeel
      77°
    more
  • Thu

    Sep 18

    75°Lo 51°

    Sunny to partly cloudy

    Excellent for lawn mowing
    • Hours of Precip
      0
    • Precip
      3%
    • Hi
      RealFeel
      77°
    more
  • Fri

    Sep 19

    69°Lo 54°

    Partly sunny and nice

    Excellent for lawn mowing
    • Hours of Precip
      0
    • Precip
      7%
    • Hi
      RealFeel
      71°
    more
  • Sat

    Sep 20

    77°Lo 61°

    Partly sunny

    Excellent for lawn mowing
    • Hours of Precip
      0
    • Precip
      12%
    • Hi
      RealFeel
      77°
  • Sun

    Sep 21

    81°Lo 61°

    Warm with sun and some clouds

    Excellent for lawn mowing
    • Hours of Precip
      1
    • Precip
      19%
    • Hi
      RealFeel
      82°
    more
Next Previous
Hi 77° RealFeel® 77° Precipitation 12%

Day

N

E

S

W

  • SSW 6 mph
  • Gusts: 11 mph

Partly sunny

  • 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 61° RealFeel® 58° Precipitation 15%

Night

N

E

S

W

  • SSW 5 mph
  • Gusts: 9 mph

Partly cloudy

  • Max UV Index: N/A
  • Thunderstorms: 1%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs

Temperature History - Sep 20

more Historical Weather Data >
  Today Normal Record 9/20/2013
High 77° 74° 94° (1895) 79°
Low 61° 55° 37° (1993) 50°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:44 AM with 12:16 of sunlight, then sets at 7:00 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 3:21 AM with 13:40 of moolight, then sets at 5:01 PM

Top Story

Princeton Weather Report

Philly: Remainder of Week to Be Dry, Cool

September 17, 2014; 7:01 AM ET

Rainfall will be scarce around Philadelphia this week, but cool air will be plentiful. more >

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

Sat. Degree Days

Sat. Evapotranspiration