SeasonMapTromsø (Tromso) weather in September
Norway
September in Tromsø: cool, rainy, with clean air — a great time to visit.
#5 of 12 months in Tromsø · #943 of 1383 destinations to visit in September · comfort 70/100 (tier B)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Tromsø in September
Other months in Tromsø
Tromsø's forum calls October the wettest month of the year locally — genuinely no pattern to the rain, capable of days on end wet or days on end cloudy, changing quickly with sudden clear breaks. Regulars flag it as touch-and-go for early winter conditions too: some years bring icy roads and snow on the ground by late October, others stay closer to freezing rain. Layered, genuinely waterproof and windproof gear is standard advice regardless.
Add your own note from Tromsø's card on the map.
Tromsø climate normals — September
| Daytime high | 12°C / 53°F | 🙂 cool |
|---|---|---|
| Nighttime low | 6°C / 43°F | |
| Feels like (high) | 10°C / 50°F | |
| Rainfall | 93 mm / 3.6 in | 🌧 rainy |
| Rainy days | 14 days | |
| Humidity | 86% | 💦 very humid |
| Dew point | 6°C / 42°F | |
| Sunshine | 6.1 h/day | |
| Daylight | 13.3 h | |
| Wind | 13 km/h / 8 mph | |
| Snowfall | 1.5 cm / 0.6 in | |
| Air quality (US AQI) | 27 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Tromsø in September
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.
BusyAutumn break in Norway, school holidays in 3 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Tromsø'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 weatherTromsø's weather peaks June–August, best around July.
Best weatherFair weatherToughest weather
What's on in Tromsø in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Nature
Aurora season
15 Sep – 5 Apr · usuallyDirectly under the auroral oval, so a quiet night still shows something from September to early April. The problem is coastal cloud, which is why the chase buses drive inland for hours.
Nearby, and something's on
Within 300 km of Tromsø — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Tromsø?
Tromsø in September — FAQ
- Is September a good time to visit Tromsø?
- September in Tromsø: cool, rainy, with clean air — a great time to visit. It ranks #5 of 12 months for Tromsø on SeasonMap's comfort score (70/100).
- What is the weather like in Tromsø in September?
- In September, Tromsø averages a daily high of 11.9°C and a low of 6.2°C, with about 92.6 mm of rain over roughly 14.3 rainy days.
- What is the air quality in Tromsø in September?
- Tromsø has a mean US Air Quality Index of about 27 in September.
- Does it snow in Tromsø in September?
- Tromsø sees roughly 1.5 cm of snowfall in September.
Other months in Tromsø
Compare Tromsø in September
Warmer or cooler than Tromsø in September
Similar destinations in Northern Europe — September
Within 300 km: Svolvær's Aurora season around 10 Sep – 5 Apr.