Today and tomorrow would bring the wettest days for Masterton, Mr Finnie said.
"There is going to be a fair bit of rain for the week. It will be raining off and on which will become more persistent on Wednesday and Thursday. The rain will be steady but [Wairarapa] won't get the same amount of rainfall expected in Auckland, Northland, the Coromandel and Bay of Plenty ... there will be some heavy rainfall though ... a cold winter week. "
While some rain could still hang around on Friday, things were expected to improve over the weekend with some sunshine by Sunday, Mr Finnie said.
"There will still be a little rain around on Friday but by Saturday it should have started to fine up with a clear day expected on Sunday."