September 17 sees frequent showers in Tromsø. Historical data shows a 42% chance of rain, so pack accordingly. Temperatures average 11°C. It's a lively time to explore Tromsø, with most attractions operating at full capacity.
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Essential Travel Info for Tromsø
Currency
NOK
kr Norwegian krone
Language
Norwegian Nynorsk
+2 more
Driving
Right side
Connect
Tromsø has a goodcellular4G and 5G signa...
Safety
Very High Safety
GPI: 1.465
Tromsø Weather Forecast for September 17
"Mild & Comfortable. Expect average highs of 10.6°C. 42% chance of rain."
What to Wear in Tromsø in September
Based on historical data for September 17, Tromsø typically experiences temperatures between 5.7°C and 10.6°C. We recommend packing heavy coat, scarf, gloves along with other layers to stay comfortable. With a 42% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Tromsø
Smart Suitcase
- Heavy Coat
- Scarf
- Gloves
- Umbrella
Average High
10.6°C
Daytime Peak
Average Low
5.7°C
Nighttime Low
Feels Like
9.5°C
❄️ Minor difference
Rain Chance
42%
Avg 2.8mm if it rains
Cloud Cover
77%
Overcast
Pressure
1009.5 hPa
High volatility
Tromsø Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 98% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 15 for extended outdoor time
Type I-II
🔴 80 min to burn
Type III-IV
🟡 120 min to burn
Type V-VI
🟢 200 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
8.4°C
Dry air
Heat Stress
Low
No heat warning
😐 Best outdoor time:
Any time during daylight hours
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Norway
Flight Traffic
Busy
79/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~52
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Tromsø
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
05:05
☀️ Noon
11:40
🌇 Sunset
18:15
⏱️ Daylight
13h 9m
Wind Speed
13 km/h
Gentle breeze
Sunshine
5.5 hrs
Direct Sun (Cloud-free)
Humidity
86%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Tromsø
Smart Flight Estimator
Airport-to-Airport Logistics
unlock smart flight estimates
Add your home location in settings to see airport details.
Travel Health & Safety in Tromsø
Travel Comfort Index
Real-time tourism conditions
Weather Quality
⛅ Good
Tourist Crowds
🟡 Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Rapid pressure changes detected. High risk for meteosensitive people.
Low pressure & humidity may aggravate joints.
Fish are active due to pressure changes.
Air quality is excellent. Perfect for outdoor activities.
Regional Safety Profile
Seismic Activity
Zero seismic activity detected in 30 years.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Tromsø on September 17 averages 10.6°C with a 42% precipitation probability. Wedding/Outdoor Event Score: 62/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Tromsø Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
September 10
13.5°C • 43% rain
Score
77
September 11
13.2°C • 45% rain
Score
75
September 12
12.6°C • 43% rain
Score
72
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (September 17) in other destinations
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📍 Is Tromsø Worth Visiting on September 17?
Planning a trip to Tromsø on September 17? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year offers a bracing seasonal atmosphere averaging 10.6°C with a 42% historical precipitation risk.
✈️ Travel Logistics: Approximately 52 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 7 vaccinations are recommended for Norway, including COVID-19.
📊 Historical Extremes: The hottest September 17 recorded in the last 30 years saw temperatures hit 14.9°C in 2025, while the coldest dropped to 3.4°C in 2023.