Climate in Tromso — Annual Weather Overview
Tromso has a alpine climate — cool summers and cold winters at high altitude. The hottest month is July (average high 16.8°C) and the coolest is December (-3.1°C). The seasons are strongly defined — a 19.9°C swing between July highs and December lows. Annual rainfall totals around 1492mm. March is the wettest month at 174.1mm, while December averages just 66.5mm. Average daily sunshine is 5.1 hours.
**Spring (March, April, May):** average highs 2.9°C, 428mm rain. **Summer (June, July, August):** average highs 15.5°C, 368mm rain. **Autumn (September, October, November):** average highs 5.0°C, 339mm rain. **Winter (December, January, February):** average highs -2.4°C, 357mm rain.
Tromso — Monthly Temperatures
Tromso — Monthly Rainfall
✅ Best months to visit
April to November
ℹ️ No months to avoid
Weather in Tromso stays reasonable all year.
Tromso weather by month
| Month | High | Low | Rain | Sun/day | Rainy days | Rating |
|---|---|---|---|---|---|---|
| January | -2.2°C | -6.4°C | 151.8mm | 0.1h | 17 | 5/10 |
| February | -1.8°C | -6.1°C | 138.8mm | 1.4h | 18 | 5/10 |
| March | -0.4°C | -5.0°C | 174.1mm | 4.7h | 21 | 5/10 |
| April | 2.3°C | -2.2°C | 123.7mm | 7.0h | 19 | 7/10 |
| May | 6.8°C | 1.3°C | 130.0mm | 9.0h | 17 | 9/10 |
| June | 14.2°C | 7.7°C | 76.9mm | 12.1h | 15 | 10/10 |
| July | 16.8°C | 10.5°C | 143.5mm | 11.4h | 15 | 9/10 |
| August | 15.4°C | 9.7°C | 147.5mm | 8.0h | 20 | 9/10 |
| September | 10.5°C | 5.9°C | 147.6mm | 4.8h | 20 | 9/10 |
| October | 4.5°C | 0.1°C | 106.1mm | 2.8h | 17 | 7/10 |
| November | 0.1°C | -3.9°C | 85.6mm | 0.4h | 14 | 8/10 |
| December | -3.1°C | -7.7°C | 66.5mm | 0.0h | 10 | 6/10 |
For the full verdict on when to go, see the best time to visit Tromso. Seasonal breakdowns: spring, summer, autumn and winter.
Sorted on weather — now sort the packing
Our sister site has a ready-made checklist for this exact trip.
Tromso packing list →More about Norway — currency, language and key facts at 247CountryInfo →
Frequently Asked Questions
What type of climate does Tromso have?
Tromso has a alpine climate — cool summers and cold winters at high altitude. Average highs range from -3.1°C in December to 16.8°C in July.
What is the hottest month in Tromso?
July is the hottest month in Tromso, with average highs of 16.8°C and lows of 10.5°C.
What is the coldest month in Tromso?
December is the coolest month, with average highs of -3.1°C and lows of -7.7°C.
What is the wettest month in Tromso?
March is the wettest month, averaging 174.1mm of rainfall over around 21 rainy days.
How much rain does Tromso get per year?
Tromso receives around 1492mm of rain per year. The driest month is December (66.5mm).
When is the best time to visit Tromso?
The best time to visit Tromso is April to November. See the full month-by-month guide →
Compare Hertz, Avis, Budget, Sixt and 800+ rental companies — book now, pay at pickup.
Compare car hire prices → Affiliate link — we earn a commission at no extra cost to youAs an Amazon Associate we earn from qualifying purchases. Links below are affiliate links.
For the packing side of things, our sister site has a ready-made checklist: Tromso packing list at 247PackingList. For currency, language and country facts see the Norway guide at 247CountryInfo.
Trip essentials for Tromso
Universal travel adapter
Worldwide plug coverage with USB-C — one adapter for every leg of the trip.
Check Price →Check clothing sizes in Norway at 247Sizing before you shop for the trip.
More Tromso travel essentials
Book UK airport parking
Flying out to Tromso from the UK? Compare Gatwick, Luton, Birmingham, Glasgow and Newcastle.
Compare Airport Parking →Travel first aid kit
Compact, TSA-friendly — covers the basics wherever you travel.
Check Price →Last updated:
Climate data sourced from Open-Meteo (open source, open data licence). Monthly averages calculated from 2020–2023 historical data. Weather can be unpredictable — always check a live forecast before travelling.