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Humid with clouds and sun
More clouds than sunshine
Cloudy, a little rain; humid
of sunlight, then sets at
of moolight, then sets at
While umbrellas will still be needed on Saturday, dry air will push southward across the Philadelphia area later this weekend. more >
Dec 20, 2012; 5:00 AM ET
The 540 line is often used by meteorologists to determine the chances of rain vs. snow.