September · Norway
Best time to visit Tromso in September Weather, crowds & prices
Weather in Tromso in September
Average temperature 9°C, 125 mm of rain, about 10 days with 6+ hours of sunshine and 86% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
6.1/10
Ranked #4 of 12 months
- Avg temp
- 9°C
- Rainfall
- 125 mm
- Humidity
- 86%
- Days with 6h+ sun
- 10
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
September in Tromso scores 6.1/10 for nature and wildlife travel - an above-average month (#4 of 12). Expect around 9°C, 125 mm of rain, and roughly 10 days with 6+ hours of sunshine this month.
Tromsø sits on an island inside the Arctic Circle, with the Arctic Cathedral across the water and the Fjellheisen cable car rising above the city.
September in Tromso — middling scores, decent value
September averages 9°C (48°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.
At 125 mm this is a genuinely wet month: about 10 days with 6+ hours of sunshine in total, and outdoor plans need an indoor fallback.
It scores 6.1/10 here, 4th of 12 months, against 8.7/10 in the destination's best month.
Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a proper rain shell rather than an umbrella, footwear you can get muddy.
Plan for mid-season pricing, with crowds are moderate.
Flexible dates? June scores 2.6 points higher here — enough to change the trip.
Frequently asked
- What is the weather like in Tromso in September?
- In September, Tromso averages 9°C, 125 mm of rain, and about 10 days with 6+ hours of sunshine. Its climate-comfort score is 6.1/10.
- Is September a good time to visit Tromso?
- September earns a 6.1/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Tromso in September?
- Expect about 125 mm of rain in September. Average humidity is 86% and there are about 10 days with 6+ hours of sunshine.
Curated in Tromso
Tickets & experiences
Things to do in Tromso
Tromso, Norway. Live activities and tours from GetYourGuide, matched to this destination.