Overview: ViennaVienna (Austria) in general has a mild continental climate. The day temperatures range from 4 °C (39 °F) in January to 28 °C (82 °F) in July. The highest night temperatures could be experienced in July with 15 °C (59 °F), the lowest in January with -3 °C (27 °F). The least rainy month in Vienna is October with its 7 days of rain, the rainiest month is June, when it rains 12 days.