The hosts took the lead when Scott Vernon pounced upon hesitancy between Buddies goalkeeper Marian Kello and Marc McAusland to lift the ball over the goalkeeper and then fire into an empty net, before Robson made sure of the points with a corner which curled in past Kello.
The win kept the Dons among the pack chasing second place in the Scottish Premiership.
Inverurie-born Robson joined his local club on a free transfer from Sheffield United in the summer and while conditions undoubtedly played a part, the midfielder knew exactly what he was doing in scoring his first goal for the Pittodrie club.
"Of course I meant it," he said.
"You can check the record books, but I think I've scored a few direct from corners.
"You know when you can hit a dangerous area and the wind is there you've always got a chance.
"It was a good goal, but it was a decent performance from the lads in the weather conditions.
"The manager made the point to us well before the game that the weather would be no excuse - both sides have to play in it, so let's come back in here with no regrets and thankfully we did.
"We went about our business the right way. St Mirren came up and battled hard, but so did we. We were prepared for it and deserved our win in the end."
Three of the Dons' next four games are against sides around them, including Robson's former clubs Inverness and Dundee United, but he is sure they can continue their good form this season over the busy festive period.
"I don't think it defines our season. All of the top six seem to be winning at the moment but we're up there on merit. It's an old cliche but it is just one game at a time," he said.
"It's a massive game for us next weekend and that's all we're focused on. We know how good Inverness are and we know it'll be a tough place to go. There'll be no excuses, we'll try our best and hopefully take home some points."