A low pressure system is moving into the Northern Tablelands and North West Slopes and Plains weather districts.
Meteorologist Melissa MacKellar, from weatherzone.com.au, says the rain will be patchy and will start later in the weekend.
She says isolated thunderstorms are possible, but it's later in the week when heavier falls are expected.
"The system is going to bring patchy rain, mainly from Sunday and with the possibility of thunderstorms as well, so we're looking generally at falls of up to 10mm," she said.
"So, we'll see that patchy rain drying up about Wednesday but then, from Thursday, a strong cold front is due to arrive and that looks like bringing some healthier falls with widespread 30mm to 40mm totals across the region."
© ABC 2013
18:15 EST After another run of very cold mornings in Victoria, there will be a few days grace for the early birds.