June was a busy month for metro in 2011. Seven out of the 10 high ridership days were in June.

According to metro officials June is often a high ridership month because of the overlap of the start of tourist season and Congress still being in session. Another big driver behind high metro usage is Nationals baseball home games.

1.  June 15, 2011 851,752 (Nationals baseball, US Open)

2.  June 14, 2011 832,789 (Nationals baseball, US Open)

3.  July 14, 2011 832,292 (Tourist Season)

4.  June 17, 2011 830,200 (Nationals baseball, US Open)

5.  June 22, 2011 826,905 (Nationals baseball)

6.  June 16, 2011 824,027 (Nationals baseball, US Open)

7.  July 27, 2011 819,717 (Nationals baseball)

8.  June 23, 2011 818,581 (Nationals baseball)

9.  June 21, 2011 818,093 (Nationals baseball)

10. April 21, 2011 817,908 (Cherry Blossom season)