Weimann made 10 starts for Watford last season
Aston Villa striker Andreas Weimann has rejoined Watford on loan until early January, at the same time as agreeing a new deal until 2014 at Villa Park.
The 20-year-old spent the second half of last season a Vicarage Road, scoring four goals in 19 appearances.
"Andy was well known to us, it was something we looked at in pre-season," Hornets boss Sean Dyche told
BBC Three Counties Radio
"He's still developing but he gave a good account of himself last season."
Weimann earned his third senior Villa appearance this week, coming off the bench in Tuesday's 2-0 League Cup win over Hereford.
The Austrian represented his country this summer at the Under-20 World Cup in Colombia.