Vejret i Trondheim i september
Trondheim i september: køligt, regnfuldt, med ren luft — et rigtig godt tidspunkt at tage afsted.
Opdateret september 2026 · klimanormaler fra ERA5-reanalysen
Nr. 5 af 12 måneder i Trondheim · Nr. 869 af 1413 rejsemål at besøge i september · komfort 75/100 (niveau B)
- Dage
- 16°C
- Nætter
- 8°C
- Våde dage
- 12
- Sol
- 7.2 h
- Luftfugtighed
- 83%
- Dagslys
- 13 h

Noter fra rejsende om Trondheim i september
Noter fra Åre i nærheden (134 km væk)
Trondheim har ikke sine egne noter for september endnu — disse handler om Åre, tæt nok på til at dele sæsonen.
Forum posters describe September in Sweden generally as a good time to visit once the summer crowds thin out, though weather is genuinely unpredictable - conditions can range from a warm, sunny 25C spell to a cold, rainy 12C stretch within the same month, with early September typically a safer bet than the back half, which tends to turn rainier. Posters recommend a flexible layering system: t-shirts for a mild day, a medium-weight sweater or cardigan for cooler stretches, and a lightweight water-resistant coat for when the rain arrives. As a mountain town well north of Stockholm, Are itself should be expected to run cooler and see more rain days than the milder southern-Sweden figures posters typically quote, given both the latitude and elevation.
Andre måneder i Trondheim
Forum posters describe December in Trondheim as bringing short, cold days with ground typically covered in snow, noting that locals lean toward cross-country skiing rather than walking this time of year. Posters are direct that heavy snow arriving right before or during a visit can rule out most walking plans entirely, though the tram ride up to Lian is consistently flagged as a safe, reliable option regardless of conditions. Posters consistently recommend wool long underwear along with a hat and gloves as genuine essentials, noting that special outerwear pants aren't really needed for strolling around the city itself. Posters flag that many students leave for the holidays, leaving Trondheim noticeably quieter than usual through late December. Posters generally rate December as workable but genuinely weather-dependent, with flexibility the key to enjoying a winter visit.
June in Trondheim barely gets dark — over twenty hours of daylight — and the forum's own saying is that if you are not happy with the weather, give it five minutes. Expect 10 to 20°C, some nights down to 5, occasional days above 25, and the honest possibility of cold, windy and rainy instead. They call June relatively dry, though the record still shows rain on about thirteen days. The packing list is a list precisely because you may need all of it: windproof and waterproof shell, a woollen sweater, long trousers, hiking shoes, and shorts. June versus July is not worth agonising over — the difference is statistical.
Tilføj din egen note fra Trondheim på kortet.
Klimanormaler for Trondheim — september
Månedsgennemsnit fra ERA5-reanalysen. AQI er det gennemsnitlige amerikanske luftkvalitetsindeks for måneden.
Travlhed i Trondheim i september
Hvor travlt der er på selve stedet — skoleferier og masseferier, de måneder en redaktør har markeret, og hvor eftertragtet vejret gør dem. Aldrig en del af komfortscoren.
TravltAutumn break i Norway, skoleferie på 3 af de markeder, der fylder stedet(anslået)
TætpakketTravltSkuldersæsonStille
Bedste måneder for vejret i Trondheim
Rangeret efter dette rejsemåls egen klimakomfortscore året igennem — noget andet end, hvor travlt der bliver (se Travlhed ovenfor).
Pænt vejrVejret i Trondheim topper juni–august, bedst omkring juli.
Bedste vejrPænt vejrHårdeste vejr
Det sker i Trondheim i september
Tilbagevendende sæsonbegivenheder, naturfænomener, lukninger og helligdage — kurateret og med kilder.
- Sæson
Pilgrim walking season
1. jun. – 15. sep. · normaltVandresæsonThe St Olav Ways into Nidaros are walkable once the snow is off the Dovre passes, and the hostels along them open for the season. Walkers arrive at the cathedral all summer, thickest in the week before Olsok. Kilde ↗
- Natur
Aurora season
15. sep. – 31. mar. · normaltFar enough south that it takes an active night rather than any dark one, but on those nights the lights are visible from the Bymarka hills fifteen minutes out of the centre. Coastal cloud is the usual spoiler.
Lige i nærheden sker der noget
Inden for 300 km fra Trondheim — en dagstur eller et kort hop — hvor der sker noget denne måned. Aldrig en del af komfortscoren.
Hvor ligger Trondheim?
Trondheim i september — ofte stillede spørgsmål
- Er september et godt tidspunkt at besøge Trondheim?
- Trondheim i september: køligt, regnfuldt, med ren luft — et rigtig godt tidspunkt at tage afsted. Måneden ligger nr. 5 ud af 12 for Trondheim på SeasonMaps komfortscore (75/100).
- Hvordan er vejret i Trondheim i september?
- I september har Trondheim i gennemsnit en dagtemperatur på 15.8 °C og en nattemperatur på 8.4 °C, med omkring 96.2 mm regn fordelt på cirka 12.2 regnvejrsdage.
- Hvordan er luftkvaliteten i Trondheim i september?
- Trondheim har et gennemsnitligt amerikansk luftkvalitetsindeks på omkring 27 i september.
Inden for 300 km: Åre's Are autumn market, omkring 20.–30. sep. og Geiranger's Dalsnibba and Eagle Road open, omkring 20. maj – 5. nov..