June is the unoffifcial beginning of the "dog days of summer", and teams react differently at this time of the year. Some teams usually heat up like the summer sun, while others melt away in the heat.
Here are the best and worst June records in baseball for the last two full seasons plus the first two days of this month:
MLB June Records - 2005-2007 (through 6/2/07)
BEST
Chi White Sox 38 16 70.4%
Oakland 38 17 69.1%
Boston 35 19 64.8%
Detroit 34 21 61.8%
Minnesota 33 21 61.1%
WORST
Chi Cubs 23 33 41.1%
Atlanta 23 34 40.4%
Tampa Bay 22 33 40.0%
Arizona 18 40 31.0%
Pittsburgh 11 37 22.9%