Isolated rain and thunderstorms are expected Sunday afternoon mainly inland and in the mountains.
Temperatures are expected to be around 29C inland, 28C on the south and east coasts, 26C on the west and northern coasts and 20C in the higher mountains.
Sunday night temperatures are expected to fall to 16C inland, 18C along the coast and 12C degrees in the mountains.
Monday is expected to be cloudy with isolated showers, mainly in the mountains.
On Tuesday and Wednesday the weather will be mostly clear with temperatures rising to the seasonal average.