The Blues manager believes his side's performances on their travels have been better than results would indicate.
Blues' last away victory came at Portsmouth in March and they have had to rely on their home form - one defeat in 16 months - to keep them away from the Barclays Premier League relegation zone.
McLeish said: "I don't think our away form has been bad. We've not had a victory away from home but we've drawn a lot.
"It's not easy to go away from home and win football matches in the Premier League. We know we're capable and, but for some decisions, we should have two or three victories.
"For me it's a little bit of bad luck in terms of the decisions not going our way and sometimes we've only got ourselves to blame. We know that we'll always encounter tough games away from home."