Bureau of Meteorology's Michael Efron said humid air was travelling from Queensland and the NSW coast into Victoria, and unusually it was remaining in the region.

"It is a little bit unusual to see this moisture persisting for so long across the Victorian region," he said.

"Typically it would last a couple of days but we have seen it last for more than a week across the Victorian area.

"Tropical moisture is feeding in from the Tasman Sea so north easterly wind is bringing that warm moist air from the Queensland coast and the NSW coast down across the Victorian region and there's really no weather system to push that away."

Mr Efron said a southerly wind would draw cooler and drier air across the state in the middle of next week, but the moisture could return by the end of the week.

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He said isolated "hit and miss" thunderstorms were likely to continue over the weekend.

"Some areas could pick up in excess of 30mm in just an hour's time whereas five kilometres away they may miss out all together," he said. "Certainly with all this tropical moisture around the state we will see some really heavy rain in parts of the state."

It comes as the Bureau's latest three-month climate outlook shows the Albury-Wodonga region is in for a warmer than usual autumn.

Bureau analysis shows across March, April and May, there is a 71 per cent chance the Border will experience warmer than usual temperatures above the median maximum, 22.5 degrees.

Data indicates there is a 44 per cent chance the Albury region will receive more than the median autumn rainfall of 114mm. Denilquin is unlikely to receive more than 67mm, the median autumn rainfall.

Bureau data indicates there is a 47 per cent chance at least 50mm of rain will fall in Deniliquin in autumn.