Trondheim weather in October

October in Trondheim: cold, rainy, with clean air — a good time to visit.

Updated September 2026 · climate normals from ERA5 reanalysis

Trondheim🇳🇴 Norway · Scandinavia · City60
  1. 33Jan
  2. 44Feb
  3. 56Mar
  4. 70Apr
  5. 80May
  6. 88Jun
  7. 92Jul
  8. 84Aug
  9. 75Sep
  10. 60Oct
  11. 42Nov
  12. 35Dec

#7 of 12 months in Trondheim · #1159 of 1413 destinations to visit in October · comfort 60/100 (tier C)

Days
10°C
Nights
4°C
Wet days
16
Sun
4.4 h
Humidity
88%
Daylight
10 h
Trondheim, Norway
Photo: Daniel Shipilov · Pexels

Traveller notes on Trondheim in October

Other months in 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.
Tripadvisor community · December · 1 month ago · Read more on Tripadvisor ↗
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.
Tripadvisor community · June · 1 month ago · Read more on Tripadvisor ↗

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Trondheim climate normals — October

Daytime high10°C / 49°F🧥 cold
Nighttime low4°C / 39°F
Feels like (high)7°C / 45°F
Sea temperature9°C / 48°F🥶 cold sea
Rainfall102 mm / 4 in🌧 rainy
Rainy days16 days
Humidity88%💦 very humid
Dew point3°C / 38°F
Sunshine4.4 h/day
Daylight9.8 h
Wind13 km/h / 8 mph
Snowfall2.4 cm / 0.9 in
Air quality (US AQI)26🍃 good

Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.

Crowds in Trondheim in October

How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.

Peak crowdsUKA student festival, Autumn break in Norway, school holidays in 4 of the markets that fill it(estimated)

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Peak crowdsBusyShoulder seasonQuiet

Best months for Trondheim's weather

Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).

Fair weatherTrondheim's weather peaks June–August, best around July.

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Best weatherFair weatherToughest weather

What's on in Trondheim in October

Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.

  • Nature

    Aurora season

    15 Sep – 31 Mar · usually

    Far 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.

  • Festival

    UKA student festival

    5 Oct – 5 Nov · usuallyMajor festivalCrowdedBook early

    Norway's largest cultural festival, run by students over about three weeks in the autumn, with revues, concerts and a temporary festival site at Samfundet. It runs in odd years only. Source ↗

What's on around the world in October →

Nearby, and something's on

Within 300 km of Trondheim — a day trip or a short hop — with something on this month. Never part of the comfort score.

Where is Trondheim?

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Trondheim in October — FAQ

Is October a good time to visit Trondheim?
October in Trondheim: cold, rainy, with clean air — a good time to visit. It ranks #7 of 12 months for Trondheim on SeasonMap's comfort score (60/100).
What is the weather like in Trondheim in October?
In October, Trondheim averages a daily high of 9.7°C and a low of 3.8°C, with about 102 mm of rain over roughly 15.9 rainy days.
What is the air quality in Trondheim in October?
Trondheim has a mean US Air Quality Index of about 26 in October.
Does it snow in Trondheim in October?
Trondheim sees roughly 2.4 cm of snowfall in October.

Within 300 km: Geiranger's Dalsnibba and Eagle Road open around 20 May – 5 Nov, and Åre's Mud season between the lifts around 1 Oct – 4 Dec.