• Tonight

    Sep 21

    Lo 57°

    A shower early; patchy clouds

    Lawn Mowing Weather
    • Hours of Precip
      0.5
    • Precip
      25%
    • Hi
      RealFeel
      82°
  • Mon

    Sep 22

    70°Lo 44°

    Mostly sunny and not as warm

    Very Good for lawn mowing
    • Hours of Precip
      0
    • Precip
      5%
    • Hi
      RealFeel
      66°
    more
  • Tue

    Sep 23

    70°Lo 50°

    Sunny and nice

    Excellent for lawn mowing
    • Hours of Precip
      0
    • Precip
      2%
    • Hi
      RealFeel
      72°
    more
  • Wed

    Sep 24

    73°Lo 52°

    Nice with plenty of sunshine

    Excellent for lawn mowing
    • Hours of Precip
      0
    • Precip
      6%
    • Hi
      RealFeel
      73°
    more
  • Thu

    Sep 25

    72°Lo 49°

    Partly sunny and pleasant

    Excellent for lawn mowing
    • Hours of Precip
      0
    • Precip
      7%
    • Hi
      RealFeel
      74°
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Sun
5pm
6pm 7pm 8pm 9pm 10pm 11pm Mon
12am
  5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
Forecast
Partly Cloudy
Partly Cloudy
Cloudy
Mostly Clear
Mostly Clear
Showers
Mostly Clear
Mostly Clear
Temp (°F) 79° 77° 74° 72° 69° 69° 68° 66°
RealFeel® 78° 75° 72° 70° 67° 65° 65° 63°
Humidity 60% 63% 71% 76% 80% 80% 80% 80%
   
  5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
Rain
 
5%
 
5%
 
8%
 
43%
 
47%
 
51%
 
25%
 
20%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Ice
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
   
  5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
Wind (mph) 4 W 4 W 4 W 3 W 3 W 3 W 3 W 3 W
UV Index 1 0 0 0 0 0 0 0
Cloud Cover 73% 58% 50% 27% 25% 14% 15% 20%
Dew Point 64° 64° 64° 64° 63° 62° 61° 60°
Middle Grid line 80 F Middle Grid line 75 F Middle Grid line 70 F Middle Grid line 65 F

Temperature History - Sep 21

more Historical Weather Data >
  Today Normal Record 9/21/2013
High 79° 74° 96° (1895) 80°
Low 57° 54° 40° (1962) 51°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:45 AM with 12:13 of sunlight, then sets at 6:58 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 4:16 AM with 13:17 of moolight, then sets at 5:33 PM

Top Story

Princeton Weather Report

Philly: September Temperature Roller Coaster to Continue

September 21, 2014; 4:41 AM ET

In keeping with tradition, temperatures will continue their up-and-down cycle during the second half of September around Philadelphia. 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?

Current Drought Status

Current Soil Conditions

Sun. Overnight Freeze

Sun. Degree Days

Sun. Evapotranspiration