SeasonMapTrondheim weather by month
Norway
The best time to visit Trondheim is June to August — 92/100 in July, 21°C and 12 rainy days. The best season is summer, June to August (88/100 on average).
The worst month is January at 33/100 — freezing, rainy, clean air. See January →
Updated September 2026 · climate normals from ERA5 reanalysis
Planning the wider trip? Best time to visit Norway →
Trondheim, month by month
Comfort score out of 100 for the kind of trip Trondheim is best for, the average high, rainy days and hours of sun a day from the climate normals, and how busy it tends to be.
| Month | Score | Tier | High | Rain | Sun | Crowds | On |
|---|---|---|---|---|---|---|---|
| JanJanuary | 33 | F | 2°C | 13 d | 1 h | Busy | 1 |
| FebFebruary | 44 | F | 3°C | 12 d | 4 h | Peak | 2 |
| MarMarch | 56 | D | 6°C | 12 d | 7 h | Busy | 1 |
| AprApril | 70 | B | 9°C | 12 d | 10 h | Busy | — |
| MayMay | 80 | A | 15°C | 11 d | 12 h | Shoulder | — |
| JunJune | 88 | A | 20°C | 12 d | 11 h | Busy | 1 |
| JulJuly | 92 | S | 21°C | 12 d | 11 h | Peak | 2 |
| AugAugust | 84 | A | 19°C | 14 d | 10 h | Peak | 2 |
| SepSeptember | 75 | B | 16°C | 12 d | 7 h | Busy | 2 |
| OctOctober | 60 | C | 10°C | 16 d | 4 h | Peak | 2 |
| NovNovember | 42 | F | 5°C | 11 d | 2 h | Peak | 3 |
| DecDecember | 35 | F | 3°C | 13 d | 1 h | Peak | 2 |
What's on in Trondheim through the year
Festivals, natural spectacles, holidays and the seasons to watch out for — curated and sourced. The month pages carry the detail.
- February
- ISFiT student festival5–20 Feb (usually)Festival
- June
- Pilgrim walking season1 Jun – 15 Sep (usually)Season
- July
- Olavsfest26 Jul – 4 Aug (usually)Festival
- September
- Aurora season15 Sep – 31 Mar (usually)Nature
- October
- UKA student festival5 Oct – 5 Nov (usually)Festival
- November
- Christmas market on Torvet25 Nov – 23 Dec (usually)Opening
Crowds in Trondheim in July
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 crowdsOlavsfest, Summer holidays in Norway, school holidays in 7 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Good to know before you go to Trondheim
Real experiences from travellers' own write-ups, quoted with a link to the original.
Visas & entry
A local's insider guide to Trondheim frames it as the more relaxed, authentic alternative to Oslo or Bergen, with a genuinely compact city center that makes walking between the Bakklandet district's colorful wooden houses and the Nidaros Cathedral easy without needing transit. Their timing advice: late May through early September gives the best weather and longest daylight for exploring, while December offers a distinctly different, quieter winter version of the same city worth considering if the crowds of summer aren't the goal.