Prepare for a taste of the Arctic.

That is the message from weather experts who are warning that temperatures will plunge below average later this week.

But it seems Hampshire will miss out on up to six inches of snow forecast for other parts of the country.

Forecasters at the Met Office say temperatures are expected to reach as low as 6C (43F) from tomorrow – 4C lower than the November average – but will feel sub-zero because of the chill factor.

It means Hampshire could experience severe frosts leading to poor driving conditions.

The warning comes as the Daily Echo-backed Surviving Winter campaign was launched to help the elderly get the vital cash they need to heat their homes.

Older adults are at higher risk of health problems and injuries related to cold weather, including hypothermia, frostbite and falls in ice and snow.

According to the NHS, keeping warm at winter can help prevent colds, flu, heart attacks, and pneumonia, and says cold-related illnesses are more likely in people over 65 years old, on a low income, with a long-term health condition, and if they are disabled.

The elderly are advised to only venture outside if vitally necessary and to wear layers, as well as a hat, gloves or mittens, a coat, and a scarf.

Neighbours and relatives are urged to check on the vulnerable to make sure they are safe and well, warm enough, and have stocks of food and medicines.

Contingency measures are already in place for the cold snap, with councils ensuring salt and gritters are ready to keep roads open.

A spokesman for the Met Office said: “There is going to be a change in the weather as we head towards the week – the past six weeks have been mild.

“There will be very cold conditions with a band of rain making its way across the country.

“The cold air comes in through Tuesday with some quite chilly nights. We are going to see cold weather but not snow for the Southampton area.

“The average maximum temperature for this time of year is around 10C (50F), and it will be quite a bit below that.

“It will be cold after the weeks of mild weather, but it’s not massively unusual to see these cold snaps. If you have been used to mild weather, be warned for frosty mornings and a bit of fog.

“There could be poor visibility first thing.

“Be aware of the fact cold conditions can lead to difficult driving conditions, and give yourself time in the mornings to get to work.”