Tromso in Summer
In summer (June, July and August), Tromso sees average daytime highs around 14°C and overnight lows near 8°C, with 284 mm of precipitation over about 45 wet days across the season. It is the warmest season of the year and the 3rd-wettest season.
Over the season highs climb from about 11°C in early June to 13°C by late August. The sky is clear or mostly clear about 11% of the time across summer, and the air most often feels dry.
Summer is Tromso's best season of the year to visit on our travel score. For the whole year in context, see Tromso's year-round climate.
- Avg daytime high
- 14°C
- warmest season of the year
- Avg overnight low
- 8°C
- Precipitation
- 284 mm
- 45 wet days
- Avg wind
- 8 km/h
- Travel score
- 3.4
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Tromso in Summer
Over the season highs climb from about 11°C in early June to 13°C by late August.
A typical summer day in Tromso reaches about 14°C and drops to 8°C overnight. The warmest of the three months is July, the coolest June.
How summer really feels in Tromso
Once humidity and wind are folded in, summer brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.
summer sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Tromso weather by month
How the three summer months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | -4° / -10° | 105 | 14.7 | 15.2 | 0.8 | 0.0 |
| Feb | -4° / -10° | 91 | 14.1 | 14.6 | 6.4 | 0.0 |
| Mar | -1° / -7° | 102 | 15.6 | 16.3 | 10.9 | 0.0 |
| Apr | 3° / -3° | 85 | 14.6 | 12.7 | 15.5 | 0.0 |
| May | 8° / 2° | 91 | 16.1 | 6.9 | 21.1 | 1.1 |
| Jun | 12° / 6° | 93 | 15.2 | 0.6 | 24 | 2.6 |
| Jul | 15° / 9° | 90 | 14.2 | 0 | 23.3 | 4.0 |
| Aug | 14° / 9° | 102 | 15.3 | 0 | 17.6 | 3.6 |
| Sep | 10° / 5° | 125 | 17.2 | 1.3 | 12.9 | 2.0 |
| Oct | 4° / 0° | 128 | 16.9 | 8.8 | 8.4 | 0.2 |
| Nov | -0° / -5° | 95 | 15 | 12.2 | 2.7 | 0.0 |
| Dec | -3° / -8° | 103 | 15.4 | 14.9 | 0 | 0.0 |
Cloud cover in Summer
The sky is clear or mostly clear about 11% of the time across summer.
Chance of precipitation in Summer
Tromso gets around 284 mm of rain and snow over 45 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 8 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 24 hours in early June to 15 h 12 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 3.9 kWh/m².
Is summer a good time to visit Tromso?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a weaker month for outdoor sightseeing in Tromso.
What to pack for Tromso in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Tromso sees daytime highs around 14°C and nights near 8°C. Pack a warm layer and rain gear. Worth having: sun protection. About 45 days see rain.
Sea temperature near Tromso in Summer
The nearest coast averages about 10°C across summer — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 28 km away) is warmest in August at about 11°C and coldest in March near 4°C.
The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 5 | 5 | 4 | 4 | 6 | 8 | 10 | 11 | 10 | 9 | 7 | 6 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 5 | Bracing |
| Feb | 5 | Bracing |
| Mar | 4 | Bracing |
| Apr | 4 | Bracing |
| May | 6 | Bracing |
| Jun | 8 | Bracing |
| Jul | 10 | Bracing |
| Aug | 11 | Bracing |
| Sep | 10 | Bracing |
| Oct | 9 | Bracing |
| Nov | 7 | Bracing |
| Dec | 6 | Bracing |
UV index in Tromso in Summer
Clear-sky midday UV across summer averages around 3 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Tromso peaks around July 15 at about 4 (moderate) — a little sun protection helps at midday. It bottoms out near January 1 at about 0 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 2 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 0 | 0 | 1 | 2 | 3 | 3 | 4 | 3 | 1 | 0 | 0 | 0 |
| Level | Low | Low | Low | Low | Moderate | Moderate | Moderate | Moderate | Low | Low | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 0 | Low |
| Feb | 0 | Low |
| Mar | 1 | Low |
| Apr | 2 | Low |
| May | 3 | Moderate |
| Jun | 3 | Moderate |
| Jul | 4 | Moderate |
| Aug | 3 | Moderate |
| Sep | 1 | Low |
| Oct | 0 | Low |
| Nov | 0 | Low |
| Dec | 0 | Low |
Where is Tromso?
Tromso sits at 69.6°N, 19.0°E, in Norway. The nearest listed city is Tromsdalen, 2.0 km away.
Topography around Tromso
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Tromso.
Within 3 km, the terrain around Tromso has large variations in elevation — a maximum elevation change of 641 m around an average of 68 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,225 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,831 m.
The land around Tromso is covered by trees (39%) and water (37%) within 3 km, grassland (36%), water (26%) and trees (20%) within 16 km, and water (43%) and grassland (21%) within 80 km.
Norway travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type C / F
- 230 V · 50 Hz
- Prices
- ≈ 91% of US
- price level, 2025
- GDP per capita
- $94,594
- 2025
- Happiness
- 7.2 / 10
- World Happiness, 2025
- Safe drinking water
- 99%
- of population, 2024
- Homicide rate
- 0.7
- per 100k, 2023
- Road deaths
- 2.1
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Very high
- EF EPI 613
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Tromso (69.6489°, 18.9551°), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.