Soggy September

After a two to five inch drenching from last Thursday through the weekend, the monthly rainfall total at BWI-Marshall has reached 6.73″.  This is in stark contrast to last September, which came in as the 4th driest September on record for Baltimore, with just 0.35″ of rain at BWI-Marshall airport.  But wet Septembers have been more common over the past decade.  From 1999 through 2008, five of the last ten Septembers in Baltimore have had at least 5″ of rain.  With more showers possible on Tuesday, the last day of the month, the average September precipitation for the past decade already comes in at 4.84″, almost an inch above the 30 year average of 3.98″.  It will be interesting to see if the rainy pattern transitions into a snowy pattern as we head into the cold weather months.

Tom Tasselmyer


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