It's because an Atlantic storm, Storm Caroline, is passing close to us.
Gardai tweeted: "Snow-ice warning with temperatures of -2c expected overnight.Check local weather & be aware of the conditions before setting out on your journey".
"It's worth remembering that ice can even form on treated roads, so please do take extra care when driving tomorrow".
Tomorrow, Friday, will be another cold day with a mix of cloud and sunny spells.
Donegal is set for a cold snap with wintry showers, snow and freezing temperatures which will continue into next week.
Northwest winds will fresh to strong and gusty.
Commenting on the research, Deirdre Ashe, Director of Personal Lines at Liberty Insurance, said: "Our research reveals that as a country, we now lack confidence in our driving abilities in adverse weather conditions".
This could be Liverpool's season in the Champions League
Mane pounced on a poor touch in midfield, and his cross into the box fell at the feet of Firmino who made no mistake. Sadio Mane gets a recall in attack as he plays alongside Mohamed Salah , Philippe Coutinho and Roberto Firmino .
Ashes: Clinical Australia make it 2-0
Earlier, Australia declared their first innings on 442-8 and bowled out England for 227, handing Australia a huge 225-run lead. James Vince began the risky dusk-and-dark session by edging a drive at Starc to slip, leaving the onus more than ever on Root.
Same-sex couples will soon be able to marry in Austria
Constitutional courts in South Africa, Colombia, and Taiwan have also ruled that a ban on same-sex marriage in unconstitutional. The legislature is able to amend the marriage laws to allow same-sex couples to marry earlier than December 31, 2018.
Apple reveals the most popular iPhone apps of 2017
Meditation, photo editing and puzzles were the themes of the best apps of the year, as determined by Apple employees. If you want to see the full lists, just load up iTunes or the App Store and you'll see it all on the front page.