Most areas will remain dry on Sunday, with the west and centre enjoying sunny weather, according to the Royal Meteorological Institute, IRM.
Maximum temperatures will range between 17°C in Hautes Fagnes and 22°C in the centre of the country.
The weather will be cloudy in the east, with thick fog in some parts of the Ardennes, but the skies will become clearer there as the afternoon progresses.
On Sunday night, the clouds will again build up in the east, and some areas could come in for mist and fog. On the other hand, there will be few clouds in the west. The weather will be mainly dry in all areas. Lows will range from 8°C to 13°C, while the wind will be slight, blowing from north to north-north-west.
On Monday, the sun will be out throughout the day in the west, with a few high-altitude clouds. Elsewhere, the weather will start off by being very cloudy. In the centre, the skies should clear up gradually as the afternoon goes by.
However, in the east, the weather will remain very cloudy to overcast, with the possibility of light showers in some areas. Highs will be between 16°C in Hautes Fagnes and 17°C in the plains.
On Tuesday, the skies will first be clear, but there will be more and more clouds as the day goes by, although the weather will remain dry, barring the odd shower. Highs will range from 19°C in the Ardennes Heights to 24°C in the plains.