Weak low pressure is affecting the area.
Thursday will start off mainly fine but clouds that from midday on may lead to isolated showers mainly in the mountains and inland.
Temperatures will rise to 27 C inland and on the south and east coasts, around 26 C on the remaining coasts and around 17 C in the higher mountains.
Tonight there will be increased cloud cover at intervals. Temperatures will fall to 13 C inland, around 16 C on the south and east coasts, around 15 C on the remaining coasts and around 9 C in the mountains.
On Friday there will be intervals of sunshine and intervals of increased cloud which from midday on will lead to scattered showers or thunderstorms.
The weekend will be partly cloudy and local showers and isolated thunderstorms are forecast.
On Friday, temperatures will edge down remaining at the same levels over the weekend at slightly below average for the time of year.