September 20 sees frequent showers in Tromsø. Historical data shows a 50% chance of rain, so pack accordingly. Temperatures average 10°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 20
"Mild & Comfortable. Expect average highs of 9.7°C. 50% chance of snow."
What to Wear in Tromsø in September
Based on historical data for September 20, Tromsø typically experiences temperatures between 5°C and 9.7°C. We recommend packing heavy coat, scarf, gloves along with other layers to stay comfortable. With a 50% 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
9.7°C
Daytime Peak
Average Low
5°C
Nighttime Low
Feels Like
7.9°C
❄️ Minor difference
Snow Chance
50%
Avg 3.7mm if it snows
Snowfall
0.1 cm
~50% chance
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 93% 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
🔴 89 min to burn
Type III-IV
🟡 134 min to burn
Type V-VI
🟢 223 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
7.5°C
Dry air
Heat Stress
Low
No heat warning
😐 Best outdoor time:
Midday (11 AM - 3 PM) when warmest
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
05:16
☀️ Noon
11:39
🌇 Sunset
18:01
⏱️ Daylight
12h 44m
Wind Speed
12.1 km/h
Gentle breeze
Sunshine
4.9 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
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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 20 averages 9.7°C with a 50% precipitation probability. Wedding/Outdoor Event Score: 54/100."
— 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 13
12.1°C • 42% rain
Score
70
September 14
11.6°C • 43% rain
Score
67
September 15
11.2°C • 42% rain
Score
65
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (September 20) in other destinations
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🌍 Explore the same date in different destinations around the world
📍 Is Tromsø Worth Visiting on September 20?
Planning a trip to Tromsø on September 20? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year offers a bracing seasonal atmosphere averaging 9.7°C with a 50% 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 20 recorded in the last 30 years saw temperatures hit 13.1°C in 2016, while the coldest dropped to 0.9°C in 2025.