Christmas comes with significant rainfall for south-east Queensland, as a wet weather system is predicted to sweep through from Tuesday.

An upper trough expected to deliver "relatively widespread" downpours could bring showers and thunderstorms as far east as Ipswich on Tuesday, reaching Brisbane by Christmas Day, according to the Bureau of Meteorology.

The state's south-east could see damp days across the Christmas period. Credit:File image

"They could just graze Ipswich, maybe Toowoomba or a little bit further west to Dalby," meteorologist Jess Gardner said.

The south-east could see that activity continue into Wednesday, with showers and even severe storm activity, which would then start clearing north from Boxing Day.