The north and northwest areas will be most at risk, but a slight dusting could occur in other parts, including Kildare.
Ireland's meteorological service is predicting that scattered snow showers will hit from late tomorrow and into Thursday night and Friday until about 4pm.
A status yellow snow and ice warning has been put in place for Donegal later today.
Despite a number of clickbait articles about risks of snow this evening, this area is likely to avoid any snowfall this evening. This means icy roads, particularly in the north and west of the country. "Lowest temperatures -2 to +3 degrees, coldest inland in the north".
Met Eireann forecaster John Eagleton said temperatures are set to plunge tonight.
It is one of three weather warnings now in place around the country.
"There will be a cold spell for the next ten days".
Meanwhile, a Status Yellow wind warning remains in place until for Donegal, Galway, Leitrim, Mayo, Sligo, Clare and Kerry unitil Thursday, December 7 8pm. Temperatures will be low and it will stay cold for most of next week.
The Road Safety Authority has cautioned motorists to expect the unexpected with high winds and icy conditions.