SeasonMapTrondheim weather in August
Norway
August in Trondheim: nice, rainy, with clean air — an excellent time to visit.
#3 of 12 months in Trondheim · #513 of 1383 destinations to visit in August · comfort 84/100 (tier A)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Trondheim in August
Other months in Trondheim
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.
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Trondheim climate normals — August
| Daytime high | 19°C / 67°F | 😎 nice |
|---|---|---|
| Nighttime low | 11°C / 52°F | |
| Feels like (high) | 18°C / 64°F | |
| Sea temperature | 16°C / 61°F | 🥶 cold sea |
| Rainfall | 104 mm / 4.1 in | 🌧 rainy |
| Rainy days | 14 days | |
| Humidity | 82% | 💦 very humid |
| Dew point | 10°C / 51°F | |
| Sunshine | 9.5 h/day | |
| Daylight | 16.2 h | |
| Wind | 12 km/h / 8 mph | |
| Air quality (US AQI) | 27 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Trondheim in August
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
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).
Best weatherTrondheim's weather peaks June–August, best around July.
August includes Olavsfest.
Best weatherFair weatherToughest weather
What's on in Trondheim in August
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
Pilgrim walking season
1 Jun – 15 Sep · usuallyTrail seasonThe 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. Source ↗
- Festival
Olavsfest
26 Jul – 4 Aug · usuallyMajor festivalCrowdedA week around Olsok on 29 July, the anniversary of the battle where Olav was killed, with concerts in and around Nidaros and a medieval market in the cathedral grounds. Source ↗
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?
Trondheim in August — FAQ
- Is August a good time to visit Trondheim?
- August in Trondheim: nice, rainy, with clean air — an excellent time to visit. It ranks #3 of 12 months for Trondheim on SeasonMap's comfort score (84/100).
- What is the weather like in Trondheim in August?
- In August, Trondheim averages a daily high of 19.2°C and a low of 10.9°C, with about 103.7 mm of rain over roughly 13.7 rainy days.
- What is the air quality in Trondheim in August?
- Trondheim has a mean US Air Quality Index of about 27 in August.
Other months in Trondheim
Compare Trondheim in August
Warmer or cooler than Trondheim in August
Similar destinations in Northern Europe — August
Within 300 km: Geiranger's Dalsnibba and Eagle Road open around 20 May – 5 Nov, and Ålesund's Norwegian Food Festival around 20–31 Aug.