The climate of Medina has an arid climate. Medina retains its warm temperature in winter, which can range from 17 °C (63 °F) at night to 25 °C (77 °F) in the day. Summer temperatures are considered very hot often being over 40 °C (104 °F) during the day dropping to 30 °C (86 °F) at night. Unlike other Saudi Arabian cities, Medina retains its warm temperature in winter, which can range from 17 °C (63 °F) at midnight to 25 °C (77 °F) in the afternoon. Summer temperatures are considered very hot and break the 40 °C (104 °F) mark in the afternoon dropping to 30 °C (86 °F) in the evening. Rain usually falls in Medina in small amounts between November and January. The rainfall, as scant as it is, also presents the threat of flooding and has been a danger since earliest times. According to Al-Kurd?, there had been 89 historic floods by 1965, including several in the Saudi period. In the last century the most severe one occurred in 1942. Since then, dams have been constructed to ameliorate the problem.