It seems like it has been raining at least half the days for a month now. January through March 2009 were below average, but in April we got 4.22 inches instead of the normal 2.77 inches (all rainfall totals are for Regan National Airport in DC, not Bethesda). May was more than double the average rainfall, 8.05 inches and 3.82 for the average. June is shaping up to be more of the same. The average monthly rainfall for June is 3.13 inches So far we have gotten 4.65 inches.
I don't know the average number of days it rains but so far in June it has rained 6 of 9 days with a chance of showers today too. In May it rained 15 of 31 days. Thats a lot of rain on a lot of days.