Overview: CarlisleCarlisle (United Kingdom) in general has a mild climate. The day temperatures range from 7 °C (44 °F) in January to 20 °C (68 °F) in July. The least rainy month in Carlisle is April with its 12 days of rain, the rainiest month is January, when it rains 17 days. The highest night temperatures could be experienced in July with 12 °C (53 °F), the lowest in February with 2 °C (35 °F).