• Tonight

    Apr 18

    Lo 47°

    Clear to partly cloudy

    Home Energy Efficiency Weather
    • Avg
      RealFeel
      63°
    • Hi
      RealFeel
      82°
    • Wind
      Speed
      7 mph
    more
  • Sun

    Apr 19

    62°Lo 46°

    Cooler

    Poor for home energy
    • Avg
      RealFeel
      49°
    • Hi
      RealFeel
      64°
    • Wind
      Speed
      12 mph
    more
  • Mon

    Apr 20

    66°Lo 55°

    Morning rain, heavy at times

    Poor for home energy
    • Avg
      RealFeel
      57°
    • Hi
      RealFeel
      65°
    • Wind
      Speed
      9 mph
    more
  • Tue

    Apr 21

    66°Lo 42°

    Mostly sunny and pleasant

    Poor for home energy
    • Avg
      RealFeel
      52°
    • Hi
      RealFeel
      67°
    • Wind
      Speed
      14 mph
  • Wed

    Apr 22

    64°Lo 42°

    Breezy with increasing clouds

    Poor for home energy
    • Avg
      RealFeel
      50°
    • Hi
      RealFeel
      62°
    • Wind
      Speed
      15 mph
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Tue
9am
10am 11am 12pm 1pm 2pm 3pm 4pm
  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Forecast
Partly Cloudy
Mostly Sunny
Sunny
Sunny
Sunny
Sunny
Mostly Sunny
Mostly Sunny
Temp (°F) 57° 59° 60° 62° 63° 64° 65° 66°
RealFeel® 54° 57° 60° 63° 65° 66° 67° 66°
Humidity 72% 64% 58% 51% 46% 42% 39% 38%
   
  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Rain
 
3%
 
3%
 
3%
 
3%
 
3%
 
3%
 
3%
 
3%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Ice
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
   
  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Wind (mph) 14 WNW 15 WNW 15 WNW 16 WNW 16 W 16 W 15 W 14 W
UV Index 2 4 5 6 7 6 5 4
Cloud Cover 51% 26% 6% 0% 0% 6% 10% 12%
Dew Point 48° 47° 45° 44° 42° 41° 40° 39°
Middle Grid line 70 F Middle Grid line 65 F Middle Grid line 60 F Middle Grid line 55 F

Temperature History - Apr 21

more Historical Weather Data >
  Today Normal Record 4/21/2014
High 66° 63° 87° (1985) 69°
Low 42° 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: Weekend to End Cooler with Rain to Follow

April 18, 2015; 4:09 PM ET

A repeat of Saturday's warmth is not expected anytime soon in Philadelphia, with the weather taking a cooler, then wet turn. more >

Energy Efficient Lightbulbs and S.A.D

Sep 8, 2012; 5:00 AM ET With shorter days and colder nights in the fall and winter, some people develop seasonal affective disorder. When shopping for lightbulbs to treat the 'winter blues,'consider energy-efficient bulbs.

Tue. Home Energy Efficiency

Tue. Degree Days

Tue. UV Index