I graphed out the year's 44 plus inches of rainfall to illustrate some important details. First, a large chunk of this year's rain fell in two stretches through the summer. 19" of rain fell in eighteen days between early June (6.78" in eight days) and late July into early August (12.64"). 43.7 percent of this year's rain fell in Philly in just those two stretches...
|Chart of 2013's precipitation. Click to see full sized image.|
Second, a reminder of how a three month window of soaking will change the reality of a year. Through the end of May, Philly was running over four inches below average on rain (about 75 percent of normal year-to-point). The summer's 29 inches of rain effectively wiped out that deficit and will produce a surplus that would carry us through the balance of the year if it didn't rain a drop between now and the end of December.
The full list is on the left.