The Steelmen moved into second spot behind Celtic last week when they came from behind to win 3-2 win at Hibernian, their fourth successive league victory on the road.
However, while his players have looked far more potent away from the environs of Fir Park this season, and Saints sit second-bottom of the table, the Well boss said: "I reminded the lads today that we were flying at this time last year, winning five (away) on the bounce and went to Hearts on Christmas Eve and put in a very poor performance (to lose 2-0).
"So just because we are going well and playing well away, it doesn't mean to say you just have to turn up and think you are going to win the game.
"I think we showed that at Hibs; the first 45 minutes wasn't great although the second 45 was obviously a massive contrast to that.
"So the players are well aware what is needed and we have to keep focused game by game.
"St Mirren are probably in the position no one would have expected them to be in.
"In Danny Lennon's defence he has been without two of his key players, Darren McGregor and Paul McGowan, so it has been a tough time for them.
"But if you look at the quality they have, they have good experienced players allied to the likes of Kenny McLean.
"Gary Teale is capable and big Steven Thompson up front, I could go through a few who are all capable
"They certainly have enough quality to start picking up points and it will be a tough game, there is no doubt about it.
"But as always with us, we give respect to the opposition but I always have great belief that if our players can play at their maximum we can go anywhere and win a game. "
McCall will get another close look at St Mirren's John McGinn, the 18-year-old midfielder whom he first came across while he doing his coaching badges.
The former Bradford manager said: "I like the boy McGinn who they have brought in.
"I did a coaching session with him a couple of seasons ago on my pro-license and I remember him standing out.
"Both Motherwell and St Mirren sent under-19 boys down so different people could coach them and do different aspects of it and actually coached St Mirren for half a day.
"He certainly stood out for me. He has a great attitude and
he has pushed himself to the front and is a first-team player.
"I always look out for him. He played in the under-20s this season and now he has kicked on into the first team and I hope his career keeps going, obviously apart from tomorrow night."