Trondheim, historically Kaupangen, Nidaros, and Trondhjem, is a city and municipality in Trøndelag county, Norway. As of 1 January 2026, it had a population of 218,460. Trondheim is the third most populous municipality in Norway, and is the fourth largest urban area. Trondheim lies on the south shore of Trondheim Fjord at the mouth of the Nidelva. Among the significant technology-oriented institutions headquartered in Trondheim are the Norwegian University of Science and Technology (NTNU), the Foundation for Scientific and Industrial Research (SINTEF), the Geological Survey of Norway (NGU), and St. Olavs University Hospital.
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The settlement was founded in 997 as a trading post and served as the capital of Norway through the Viking Age until 1217. From 1152 to 1537, the city was the seat of the Catholic Archdiocese of Nidaros; it then became, and has remained, the seat of the Lutheran Diocese of Nidaros and the site of the Nidaros Cathedral. The city was incorporated in 1838. The current municipality was formed in 1964, when Trondheim merged with Byneset Municipality, Leinstrand Municipality, Strinda Municipality, and Tiller Municipality, and further expanded on 1 January 2020, when Trondheim merged with Klæbu Municipality.
From the Wikipedia article Trondheim, CC BY-SA 4.0.
Weather
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Forecast by Open-Meteo from national weather models. A forecast, not a measurement.
The past twelve months
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ERA5 reanalysis from Copernicus, via Open-Meteo. Modelled on a ~25 km grid, not measured at a station.
Air right now
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CAMS European and global air quality forecast, via Open-Meteo. Modelled on an 11–40 km grid; European AQI bands from the EEA.
Nearby on Wikipedia
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Articles with coordinates within 10 km, from English Wikipedia.
Towns around Trondheim
Straight-line distance and compass bearing from the town centre.