May 2012 will finish with at least 21 days during which at least a trace of rain was measured at BWI Marshall Airport, a turnaround from an extended dry spell in April. But it hasn't helped May rainfall totals.
Perhaps that's because almost half of those days were the bare minimum -- a trace of rain. That means we had some gloomy and misty days, but they provided less than a hundredth of an inch of precipitation.
Seven days saw a tenth of an inch or more, but only one of those days exceeded half an inch, 0.56 inches April 21.
In April, by contrast, there was a 15-day stretch without anything more than a trace of rain. It was the fourth-longest April stretch without rain on record.