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A t-storm late this afternoon
Mostly sunny and very warm
Partly sunny and more humid
of sunlight, then sets at
of moolight, then sets at
While temperatures and humidity levels will fluctuate slightly from day to day this week, unseasonable warmth will continue into next weekend around Washington, D.C. more >
Dec 20, 2012; 5:00 AM ET
The 540 line is often used by meteorologists to determine the chances of rain vs. snow.