Jordan has a hot, dry climate characterized by long, hot, dry summers and short, cool winters. The climate is influenced by Jordan's location between the subtropical aridity of the Arabian desert areas and the subtropical humidity of the eastern Mediterranean area. January is the coldest month, with temperatures from 5°C to 10°C, and August is the hottest month at 20°C to 35°C. Daily temperatures can be very hot, especially in the summer; on some days it can be 40°C or more, especially when the Shirocco, a hot, dry southe rly wind blows. These winds can sometimes be very strong and can cause Sandstorms.
About 70 percent of the average rainfall in the country falls between November and March; June through August are often rainless. Rainfall varies from season to season and from year to year. Precipitation is often concentrated in violent storms, causing erosion and local flooding, especially in the winter months.
Lightweight cotton clothes are advised in the summer, with a sweater for cooler evenings, especially in the inland areas. Waterproof medium wear is recommended for the winter.
The Climate of Jordan can be classified as BSh climate, a hot Climate with dry summers and the annual average Temperature above 18°C. The eastern and southern areas of Jordan have a BWh Climate; a hot, dry desert climate with annual average temperatures above 18°C.