Stormers put Glasgow under intense pressure in the opening quarter of the second period but Weir's composure and kicking accuracy made sure the visitors never got within touching distance on the scoreboard.
Weir's opportunities were limited last season as Tom Jordan made the most of his opportunities in the No 10 jersey. The departure over the summer of Domingo Miotti means there is one fewer stand-off on the Warriors roster and an opportunity for Weir to show that he still has plenty to offer.
"I am only 32," said Weir in The Scotsman when asked if he was considered an elder statesman in the Glasgow squad. "I am still in good physical shape. I went away in the summer and came back in better physical shape than ever before. There are a lot of folk playing the game older than me, albeit I started a bit earlier at 19 so maybe it seems I have been round the block a fair amount of time."
Weir has come off the bench in all three of Glasgow's URC games this season and he praised the way Franco Smith has reinvigorated the club since taking over last year.
"He transitioned the way we played the game," said Weir. "We have a plan for everything that comes our way during a game. It is great as players we have those plans to fall back on. It is how you bring that to life and put your own stamp on it. There is never a point in the game when you feel under stress or making things up. As players we are in a good place."
The stand-off knows Jordan will be a tough man to displace in the starting XV but is enjoying the challenge. "I have been in this position before when I have had competition in my position and you have to just stay patient and work hard and I feel I have been doing that and that is all I can do," said Weir.