Weimann scored in last Saturday's 3-2 Premier League win and was one of eight players who started for Villa who were 25 or under.
And the Austria international believes the youthfulness of the Villa side is benefiting them this season.
"The whole team, it showed on Saturday again, we are all in it together," he told Sky Sports News.
"We all want to be together and understand each other, we are a young team of the same age and obviously it helps us.
"We have that attitude where we will go to the end and that showed on Saturday."
Villa are now ninth in the table with three wins from their first six matches.
They travel to play seventh-placed Hull on Saturday and Weimann is confident he can continue to shine in the absence of the injured Christian Benteke.
"Obviously we know Christian has scored loads of goals," he added, "but we had Gabby [Agbonlahor] out as well.
"We have that tight group where even he was saying we can play without him and we showed that on Saturday.
"We are looking forward to Hull on Saturday and we will try and win it. They have come up and won a few games but we have done that and will try and take three points.
"They will be full of confidence like us and hopefully it will be a good game with us coming out on top."