• Tonight

    Apr 21

    Lo 43°

    Clear

    Asthma Weather
    • Hi
      RealFeel
      66°
    • UV
      6 - High
    • Air Qual.
      Good
  • Wed

    Apr 22

    65°Lo 37°

    Rain and a thunderstorm

    At Risk weather for asthma
    • Hi
      RealFeel
      64°
    • UV
      4 - Moderate
    • Air Qual.
      Good
    more
  • Thu

    Apr 23

    56°Lo 35°

    Clouds and sun; windy, cooler

    Neutral weather for asthma
    • Hi
      RealFeel
      50°
    • UV
      6 - High
    • Air Qual.
      Good
    more
  • Fri

    Apr 24

    56°Lo 39°

    Breezy with periods of sun

    Beneficial weather for asthma
    • Hi
      RealFeel
      54°
    • UV
      6 - High
    • Cloud
      Cover
      54%
    more
  • Sat

    Apr 25

    66°Lo 42°

    Mostly cloudy

    Beneficial weather for asthma
    • Hi
      RealFeel
      68°
    • UV
      6 - High
    • Cloud
      Cover
      76%
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Tue
2am
3am 4am 5am 6am 7am 8am 9am
  2am 3am 4am 5am 6am 7am 8am 9am
Forecast
T-storms
T-storms
T-storms
T-storms
Cloudy
T-storms
Mostly Sunny
Mostly Sunny
Temp (°F) 58° 57° 56° 54° 55° 56° 56° 57°
RealFeel® 52° 53° 52° 52° 56° 53° 54° 56°
Humidity 83% 85% 87% 87% 80% 74% 73% 64%
   
  2am 3am 4am 5am 6am 7am 8am 9am
Rain
 
70%
 
64%
 
65%
 
56%
 
49%
 
61%
 
25%
 
20%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Ice
 
0%
 
0%
 
0%
 
0%
 
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0%
 
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  2am 3am 4am 5am 6am 7am 8am 9am
Wind (mph) 6 NNW 6 NNW 5 WSW 4 WNW 4 NW 5 NW 8 WNW 10 WNW
UV Index 0 0 0 0 0 0 1 2
Cloud Cover 97% 98% 99% 99% 99% 99% 25% 25%
Dew Point 53° 52° 52° 51° 49° 48° 48° 45°
Middle Grid line 60 F Middle Grid line 55 F Middle Grid line 50 F

Temperature History - Apr 21

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

Philadelphia: Cooler Air to Sweep Away Warmth This Week

April 21, 2015; 4:04 PM ET

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

The Dangers of Bus Travel

Dec 10, 2012; 5:00 AM ET While bus transportation is one of the most affordable, it is important to know which motor coach companies rank highest in safety.

Tue. Air Quality

Tue. Asthma Risk

Tue. UV Index