The Met Office has issued a yellow weather warning for rain on Tuesday morning.
The national weather forecaster noted that spells of heavy rain may bring some disruption to parts of southeast Northern Ireland.
The warning will last throughout the night, mainly affecting counties Armagh and Down.
Rain is expected to push north across much of Northern Ireland during Tuesday evening and overnight, clearing from the south on Wednesday morning.
The heaviest rain is likely to be across southeastern areas, where 20-30 mm is likely widely, and some high ground of South Armagh and South Down – particularly the Mournes – could see 50-80 mm.
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While it will be wet in NI today, it will still be relatively warm, with highs of 15C in places.
Tuesday night is thought to be ‘mild and breezy’ temperature wise, with a minimum of 11C.
In relation to the weather warning, residents have been advised to check if your property could be at risk of flooding. If so, consider preparing a flood plan and an emergency flood kit.
Give yourself the best chance of avoiding delays by checking road conditions if driving, or bus and train timetables, amending your travel plans if necessary.
People cope better with power cuts when they have prepared for them in advance. It’s easy to do; consider gathering torches and batteries, a mobile phone power pack and other essential items.
Be prepared for weather warnings to change quickly: when a weather warning is issued, the Met Office recommends staying up to date with the weather forecast in your area.
Wednesday will be cloudy with outbreaks of heavy rain, with highs of 15C making any dry and sunny spells feel warm.
Winds will ease on Thursday, turning drier and brighter with highs of 16C, but a few showers will still linger.
Meteorologist Tom Morgan said next weekend is “looking pretty unsettled”, with the North West including Scotland and Northern Ireland being wet and windy but possibly less so in the South East.
He added: “So it will be pretty autumnal with temperatures that might be much higher than this weekend, so into mid-teen temperatures.”