Climate - Trondheim (Norway)

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The climate of Trondheim is moderately continental, with cold winters, during which the average temperature is a few degrees below freezing, and mild summers.
The city is located is located in the county of Trøndelag, which occupies the central part of Norway. We are inside a large and deep fjord that flows into the west coast, and therefore there is a slightly colder and less rainy winter than the coast directly exposed to the Atlantic Ocean (in the part called Norwegian Sea). The result is a contrasted climate, which is affected by both the maritime influence from the west and the continental influence from the east.
The average temperature of the coldest month (January) is of -1.9 °C (29 °F), that of the warmest month (July) is of 15 °C (59 °F). Here are the average temperatures.

Precipitation amounts to 875 millimeters (34.4 inches) per year. It ranges from 45 mm (1.8 in) in the driest month (April) to 90 mm (3.5 in) in the wettest ones (July, August, September). The rains are frequent all year round, but especially from August to January. Here is the average precipitation.

The winter is cold and cloudy.
There are quite mild periods, more or less long depending on the winter, in which Atlantic currents prevail, the temperature exceeds freezing, it often rains and the wind blows.
There are also colder periods, when it can snow, and the temperature can drop below freezing. Snowfall can sometimes be abundant.
On the coldest nights of the year, the temperature can drop as low as -20 °C (-4 °F), but sometimes even as low as -25 °C (-13 °F), as happened in January 1986, January 1987, January 1996 and February 2010. In January 1979, it went down to -26 °C (-15 °F).

The summer is mild, with fairly frequent rains. The days are very long.
There are periods characterized by rain and cool weather, with highs below 15 °C (59 °F). However, there are also periods when it does not rain and the temperature exceeds 20 °C (68 °F).
Occasionally, there may also be short hot periods, in which the temperature reaches 30 °C (86 °F). In July 2019, the temperature reached 33.5 °C (92.3 °F), and exceeded 30 °C (86 °F) for six consecutive days. In June 2020, the heat record was broken, with 34.3 °C (93.7 °F).



The latitude of Trondheim is 63°26'N. On the shortest day of the year, December 21st, the sun rises at 10:00 am and sets at 2:30 pm. On the longest day, June 21, the sun rises at 3:00 am and sets at 23:40 pm. The white nights, in which it is not completely dark even at midnight, occur from April 30 to August 13.

Best Time

The best time to visit Trondheim is the summer, from June to August, since it is the mildest season. However, you must take into account some rainy days and a bit of cold at night.