Despite its northerly latitude, Norway's coastal areas enjoy a temperate climate due to the influence of the Gulf Stream, and its ports are ice-free all year-round. There are high levels of rainfall throughout the year on the coast.

Inland, the climate is more extreme, with colder winters and warmer summers. There is frequent snowfall during the winter months, and glaciers cover much of the interior throughout the year.

Average temperatures in July are around 16 degrees C in Oslo and 11 degrees C in the far north, while average January temperatures are 1 degrees C in the south and -3 degrees C in the north. However, summer temperatures can increase to around 30 degrees C and winter temperatures can fall to below -25 degrees C anywhere in the country, particularly inland.