Motorists have been warned of hazardous driving conditions as freezing rain and ice are expected to hit most parts of the country.
The Met Office has issued yellow "be aware" warnings for every region in Scotland, with the exception of Orkney and Shetland.
It said rain falling on very cold surfaces could freeze instantly, forming a layer of ice.
The forecaster's website said: "The public should be aware that this will make pavements very dangerous locally, and driving conditions could become extremely hazardous, particularly where roads are untreated."
Lindsay Dovey, a forecaster with MeteoGroup, the weather division of the Press Association, said the coldest temperatures were expected to affect the south of the country overnight and into this morning.
She said: "The temperatures don't look too bad during the day, between 3-6C in the south of Scotland and 6-10C in the north. But it will be colder than that during the night and early in the morning, which is when there will be a possibility of ice. There may also be some snow in the central belt, but for most of the country there will be rain."
Transport Minister Keith Brown said: "With these Met Office yellow warnings in place, it is important that people travelling on the roads take extra precautions and check travel bulletins or the Traffic Scotland website for the latest advice.
"The public should be aware that pavements could be very dangerous locally, and driving conditions could become extremely hazardous, particularly as freezing rain is so difficult to treat.
"Transport Scotland, its operating companies and the Met Office have been in regular contact to monitor conditions as they arise and to deploy front-line patrol, gritters and support vehicles.
"As a precaution, we will be activating some of the Multi Agency Response Team partners from 5am to co-ordinate our response to the conditions."
