Orkney: Climate
The climate is remarkably temperate and steady for such a northerly latitude. The average temperature for the year is 8 °C (46 °F), for winter 4 °C (39 °F) and for summer 12 °C (54 °F).
The average annual rainfall varies from 850 mm (33 in) to 940 mm (37 in). Fogs occur during summer and early autumn, and furious gales may be expected four or five times in the year.
To tourists, one of the fascinations of the islands is their nightless summers. On the longest day, the sun rises at 03:00 and sets at 21:29 GMT and darkness is unknown. It is possible to read at midnight and very few stars can be seen in the night sky. Winter, however, is long. On the shortest day the sun rises at 09:05 and sets at 15:16.
The soil generally is a sandy loam or a strong but friable clay, and very fertile. Large quantities of seaweed as well as lime and marl are available for manure.