Final answer:
The annual temperature range along coastal Norway at 60° N is estimated to be around 13 °C (23 °F), influenced by the North Atlantic Current and the Arctic and Mediterranean climates.
Step-by-step explanation:
The coastal region of Norway at 60° N experiences a moderate climate influenced by the North Atlantic Current, part of the Gulf Stream, which keeps the coast free of ice and snow throughout the winter. The mean temperature variation is affected by the Arctic zone to the north and the warmer Mediterranean Sea to the south, which provide a Type C climate closer to the coast. Considering the geographical and climatic conditions, the annual temperature range along coastal Norway is relatively narrow. A reasonable estimate for this region would be an annual temperature range closer to 13 °C (23 °F), which reflects typical coastal climates with their moderated seasonal fluctuations. It is not extreme like the inner parts of Eastern Europe or Russia, nor as consistent as Mediterranean coastal areas.