Overview: SwitzerlandSwitzerland in general has a mild climate. The day temperatures range from 4 °C (39 °F) in January to 25 °C (77 °F) in July. The highest night temperatures could be experienced in July with 14 °C (58 °F), the lowest in January with -2 °C (29 °F). The least rainy month in Switzerland is February with its 11 days of rain, the rainiest month is May, when it rains 15 days.