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Sunny; mild this afternoon
Rain and drizzle possible
Intervals of clouds and sun
of sunlight, then sets at
of moolight, then sets at
While blustery winds will howl on Christmas Day, Philadelphia will continue to escape more typical winter cold until next week. more >
Dec 20, 2012; 5:00 AM ET
The 540 line is often used by meteorologists to determine the chances of rain vs. snow.