Climate of Iceland

The climate of Iceland is subarctic (Köppen climate classification: Cfc) near the southern coastal area and tundra inland in the highlands. The island lies in the path of the North Atlantic Current, which makes its climate more temperate than would be expected for its latitude just south of the Arctic Circle. This effect is aided by the Irminger Current, which also helps to moderate the island’s temperature. The weather in Iceland can be notoriously variable.

The aurora borealis is often visible at night time during the winter. The midnight sun can be experienced in summer on the island of Grimsey off the north coast; the remainder of the country, since it lies just south of the polar circle, experiences a twilight period during which the sun sets briefly, but still has around 2 weeks of continuous daylight during the summer.

The Icelandic winter is relatively mild for its latitude. The southerly lowlands of the island average around 0 °C (32 °F) in winter, while the Highlands of Iceland tend to average around −10 °C (14 °F). The lowest temperatures in the northern part of the island range from around −25 to −30 °C (−13 to −22 °F). The lowest temperature on record is −39.7 °C (−39.5 °F).

The average July temperature in the southern part of the island is 10–13 °C (50–55 °F). Warm summer days can reach 20–25 °C (68–77 °F). The highest temperature recorded was 30.5 °C (86.9 °F) at the Eastern fjords in 1939. Annual average sunshine hours in Reykjavík are around 1300, which is similar to towns in Scotland and Ireland.

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