Saudi Arabia Weather

From May to September, expect daytime temperatures of 45°C (113°F) or higher throughout the country with slightly cooler coastal temperatures. In the dead of winter (December to January) temperatures in the main cities (except Jeddah), will drop into the teens during the day and even hit zero in some places overnight (particularly in the central deserts). During winter the mountains can also be shrouded in fog. In the southern coastal areas it rains quite regularly (it's about the only place that does) with high humidity in the summer, but there's very little rainfall in the capital Riyadh and the northern parts of the Red Sea coast, making the cooler winter days a pleasure.