Sydney, Melbourne, Brisbane weather: When rain will strike

Millions of Australians will shiver through yet another arctic week, with temperatures set to fall below average as a cold system settles itself across much of the country.

Temperatures in southeastern Australia are expected to drop 2-6C below average, while parts of the Northern Territory, South Australia , and Western Australia could see temperatures 6-10C below average.

The chilly weather is caused by a high-pressure system that followed a cold front that swept across the region over the weekend.

Weatherzone explained while the high pressure is common after a cold front, the system will stall over Tasmania on Monday before becoming what experts term a 'blocking high' by Tuesday morning.

The large, slow-moving system is set to drive a prolonged period of frosty nights and cold days with widespread morning fog and frost patches for parts of Victoria and southern New South Wales .

The blocking high is also forecast to become so strong it even challenges Australia's all-time air pressure record.

In Queensland and northern NSW, the high pressure will bring persistent south-easterly winds to the coast, increasing the chance of showers each day.

For the remainder of northern Australia, the high to the south will increase winds, leading to warmer days.

The winds also increase the region's fire danger, given July marked the start of northern Australia's bushfire season.

For parts of South Australia and Western Australia, the high pressure system along with the cold fronts will likely bring rain for longer periods than normal.

It is a wet start to the week for residents in Brisbane.

Up to 20mm of rain is forecast for Tuesday and 10mm on Wednesday before easing towards the end of the week.

Possible showers are forecast from Thursday before increasing over the weekend, with up to 4mm set to fall on Sunday.

Maximum temperatures will remain between the high teens to low 20s for the week, while minimum temperatures hover around the low to mid teens.

Showers are forecast for the week, with the heaviest falls of up to 15mm set for Tuesday.

Between 7 to 9mm of rain is expected to fall each day from Wednesday through to Sunday.

Maximum temperatures will remain around the mid to high teens, while minimum temperatures will settle between 10 and 11C.

Residents in Canberra will have a cold but relatively dry week, with partly cloudy weather forecast well into the weekend.

Morning frost is expected on Tuesday and Wednesday, while the slight chance of a shower is forecast from Thursday and through to the weekend.

The mercury will fall to an icy -2C on Tuesday and 0C on Wednesday, with minimum temperatures reaching a high of 3C.

Maximum temperatures for the week will remain around the low to mid teens.

A cold and dry week is forecast for Melbourne, with partly cloudy days set for the week ahead.

Maximum temperatures are expected to range between 12C and 14C.

The mercury will drop to a chilly 1C on Wednesday, with minimum temperatures settling around 2C to 3C for the rest of the week.

The blocking high pressure system will also bring frost to some areas of the city and the chance of morning fog for most of the week.

Aussies in Hobart will enjoy a cold but mostly sunny week as temperatures reach a maximum of 11C to 12C, while minimum temperatures hover between 2C and 3C.

Meanwhile, in Launceston, temperatures are forecast to fall below zero degrees for the next seven consecutive mornings.

Cold and dry weather is forecast for the start of the week in Adelaide before the chance of showers develops from Thursday through to Sunday.

Maximum temperatures will remain around the mid teens.

Tuesday and Wednesday will see minimum temperatures of 4C, before rising to a minimum of 10C on Sunday.

Up to 10mm of rain is forecast to fall across three days from Friday and over the weekend.

Mostly sunny weather is forecast for Perth this week.

The mercury will fall as low as 6C on Wednesday, while maximum temperatures will reach the high teens across the week.

Showers and up to 8mm of rain is expected on Tuesday before clearing and then returning on the weekend, with up to 15mm of rain on Sunday.

Meanwhile, residents in Darwin will escape the cold weather with sunny conditions and temperatures remaining in the low 30s well into the weekend.

Minimum conditions will see some mornings drop to 17C and 19C.