• Tonight

    Apr 20

    Lo 54°

    Showers and thunderstorms

    Bicycling Weather
    • Precip
      65%
    • Hours of Precip
      3
    • Wind
      Gust
      30 mph
    more
  • Tue

    Apr 21

    65°Lo 44°

    Partly sunny, breezy and nice

    Very Good for biking
    • Precip
      3%
    • Hours of Precip
      0
    • Wind
      Gust
      25 mph
  • Wed

    Apr 22

    62°Lo 37°

    Showers late in the afternoon

    Very Good for biking
    • Precip
      75%
    • Hours of Precip
      1.5
    • Wind
      Gust
      25 mph
    more
  • Thu

    Apr 23

    55°Lo 35°

    Cooler with clouds and sun

    Good for biking
    • Precip
      7%
    • Hours of Precip
      0
    • Wind
      Gust
      25 mph
    more
  • Fri

    Apr 24

    54°Lo 33°

    Breezy with periods of sun

    Good for biking
    • Precip
      13%
    • Hours of Precip
      0
    • Wind
      Gust
      24 mph
    more
Next Previous
Hi 65° RealFeel® 68° Precipitation 3%

Day

N

E

S

W

  • WNW 14 mph
  • Gusts: 25 mph

Partly sunny, breezy and pleasant

  • Max UV Index: 7 (High)
  • Thunderstorms: 1%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs
Lo 44° RealFeel® 33° Precipitation 13%

Night

N

E

S

W

  • SSW 14 mph
  • Gusts: 22 mph

Clear, breezy and cooler

  • Max UV Index: N/A
  • Thunderstorms: 2%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs

Temperature History - Apr 21

more Historical Weather Data >
  Today Normal Record 4/21/2014
High 65° 63° 87° (1985) 69°
Low 44° 43° 30° (1925) 33°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:12 AM with 13:32 of sunlight, then sets at 7:44 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 8:27 AM with 14:36 of moolight, then sets at 11:03 PM

Princeton Weather Report

Philly: Cooler Air to Sweep Away Warmth This Week

April 20, 2015; 3:47 PM ET

Cooler air will push into the Philadelphia area during the middle and latter part of the week. more >

Is Your Outdoor Gear Waterproof?

Dec 5, 2012; 5:00 AM ET Now that it's cold enough to hit the slopes, you may want to look more closely at what materials your winter sports gear is made of. As it turns out, not all waterproofing is created equal.