A yellow weather warning is set to come into place across Northern Ireland this evening.
The Met Office has issued a yellow warning for fog and ice from 5pm on December 12 to 10am on December 13.
It comes as temperatures drop to as low as -6 in some parts of the country.
Read more: Flights cancelled to and from Belfast airport amid freezing weather
The Met Office said: "Freezing fog is expected to become more extensive overnight and could produce significantly reduced visibility to 50-100 metres at times. This may also lead to some patchy ice forming on untreated surfaces.
"Although fog may be less widespread in Antrim and Down, a few showers are likely to move inland overnight leading to some icy stretches, particularly on untreated surfaces. Fog is expected to clear through Tuesday morning."
What to expect:
- Some injuries from slips and falls on icy surfaces
- Probably some icy patches on some untreated roads, pavements and cycle paths
- Slower journey times with delays to bus and train services possible, as well as a chance of delays or cancellations to flights
The Met Office has forecasted "widespread frost" going into Tuesday morning.
They said: "Most staying dry but increasing risk of wintry showers overnight, as the wind turn to the north and freshen a little. Minimum temperature -6 °C.
"Another cold day (Tuesday) despite good spells of weak winter sunshine, with scattered wintry showers brought on northerly breezes. Maximum temperature 4 °C."
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