MET Eireann Met Eireann have issued a Status Yellow Weather Warning for snow across the country, the warning is valid from 8pm today until midday tomorrow.
Severe weather warning videos created in collaboration with RTÉ's Teresa Mannion and including advice for driving in snow and icy conditions are available on the RSA YouTube channel, RSAIreland.
Later on in the week snow may also fall on high ground in the north of England.
Met Office forecaster Craig Snell said: "This working week everyone's going to notice a distinct chill in the air".
They advised: "Be seen".
Showers are expected to turn to sleet and snow, with showers being heaviest and most frequent in the western half of the country.
The dramatic change will mark a 10C drop in overnight temperatures from Sunday to Monday and will come as a shock to Britons who have been enjoying milder temperatures in recent weeks.
However weather experts measure spring from March 1 using meteorological seasons.
Showers will continue this evening and overnight, again with the risk of sleet and hail in northern and hilly areas. Drivers are being urged to take care on the roads. Daytime temperatures between 6 and 9 degrees at best.
Gales have been forecast for the northwest coast for Tuesday morning and it is set to be very cold everywhere with temperatures several degrees below average.