Friday's forecast calls for nighttime lows of 10-15C and daytime highs of 18-20C, with rain forecast throughout the country. The skies will be mostly cloudy with bright spells.

Saturday will bring more rain and a chance of thunderstorms in some places, with nighttime lows at 11-15C and daytime highs at 19-21C.

On Sunday, temperatures will range from nighttime lows of 13-17C to daytime highs of 22-24C, with brief showers forecast in some places.

Temperatures are expected to climb higher early next week, up to 26-27C in places.