Climate of Saudi Arabia In general but severe heat and drying is characterized, climate different in coastal and inland. Red Sea coast of the subtropical climate, summer and winter is mild climate with high temperature and high humidity. Temperature difference due to the season is almost no, the lowest temperature is 0 degrees Celsius -, the highest temperature 0 degrees Celsius ~. In the summer there is also the earth's surface temperature is greater than 0 degrees Celsius. 0 to about 0 through humidity year. Sandstorm often. On the other hand in the inland Riyadh in the dry climate of the continental, whereas more than the Celsius temperature during the day in summer, easy to spend the humidity is also not high in the 0 before and after Celsius at night. At night in winter sometimes it falls below 0 degrees Celsius, also there when the coat is needed. Arabian Gulf coast, the temperature changes greatly depending on the season and time of day. Is over the - month sometimes temperature is about 0 degrees Celsius, but the winter is sometimes chilly to below 0 degrees Celsius to reverse.