Tromso Weather in August

🇳🇴 Norway

15°C

High

9°C

Low

Rain Days

Sunshine

65%

Humidity

Europe › 🇳🇴 Norway › Tromso

Updated: March 2026

Is August a Good Time to Visit Tromso?

5/10

Fair

August is a fair time to visit Tromso (5/10). With 9 daily sunshine hours and only 16 rain days, this month delivers genuinely reliable outdoor conditions, ranking it 5th sunniest of the year in Tromso. Culture-focused travellers and those who prefer lighter crowds will find August a practical choice, with prices running lower than peak June without sacrificing all the good weather. September offers a similar profile at lower hotel rates if dates are flexible. Watch out for prolonged rain stretches: with 16 wet days, a fully outdoor itinerary is risky. Build in museum days and covered market visits as contingency. Planning tips: accommodation is generally available without long lead times, and flight prices are typically lower than peak season. Flexible travellers will find the best deals by booking 2-4 weeks ahead. Mid-week arrivals consistently unlock lower hotel rates than weekend check-ins.

vs July:16°C avg high

Visiting Tromso in August means mild conditions with highs around 15°C. Factor in 16 potential rainy days and 65% average humidity when planning your daily activities.

15°C

Avg High

9°C

Avg Low

16 days

Rain Days

Sunshine

65%

Humidity

Temperature in Tromso in August

The 6°C day-night temperature range is typical for continental climates: a light jacket in the morning that you shed by midday and need again after sunset. Humidity averages 65%, which is comfortable for most visitors. On warmer days, lighter fabrics help with the mild stickiness in the afternoon. UV index averages 10 this month, classed as high to very high. SPF 30+ sunscreen, a brim hat, and sunglasses are not optional between 10am and 4pm. Winds are calm at an average 12 km/h, so wind-chill is not a factor in planning your clothing. In Fahrenheit: 59°F average high, 48°F overnight low. Data sourced from Open-Meteo ERA5 climate reanalysis (1991–2020 normals).

Temperature in August

Monthly Precipitation (mm)

What to Wear in Tromso in August

Morning9°CBefore the day warms up

Afternoon15°CPeak daytime temperature

Evening12°CAfter sunset cools down

Packing for Tromso in August means dressing for 15°C days and 9°C evenings. A mid-weight jacket over a sweater handles 15°C daytime temperatures; the combination stays comfortable all day without overheating. Evening temperatures settle at 9°C, a modest 6°C drop that a light cardigan or denim jacket covers. European cobblestones reward low-profile walking shoes over flip-flops or heels, with cushioned trainers or leather walking shoes being the practical choice. With 16 rain days expected, a compact travel umbrella is worth the bag space. A waterproof jacket is better than an umbrella if you plan full-day outdoor routes.

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Local tip: Tromso's cobbled streets turn slippery in the rain. Waterproof walking shoes with a non-slip sole outperform fashionable footwear on wet stone, and you'll cover significantly more ground in comfort.

Events in Tromso in August

August has no major festivals or public holidays in Tromso, which is one of its practical advantages for independent travellers. Attractions run at lower capacity than during peak event periods, queues are shorter, and accommodation is easier to find without needing to book many months in advance. Local restaurants, markets, and transport operate at a relaxed pace, making this an ideal time for visitors who prefer a more authentic, unhurried experience of everyday city life rather than large crowds drawn in by a single major headline event.

What to Pack for Tromso in August

Based on 15°C average highs and 16 rainy days

Warm jacket (down or fleece)
Merino wool base layer (regulates temperature and resists odour)
Sweaters and lined trousers
Scarf and lightweight gloves
Compact folding umbrella
Waterproof outer layer or packable rain jacket
Quick-dry clothing that recovers fast after a shower
Comfortable walking shoes (a second pair lets the first air out overnight)
Universal travel adapter
Small day pack for city exploration
Reusable water bottle

Best Activities in Tromso in August

Explore the old town's cobblestone backstreetsMorning (9-11am)At 15°C, conditions are pleasant for unhurried exploration on foot
Visit hilltop viewpoints for panoramic city viewsLate afternoon (4-6pm)Low sun angle creates dramatic light for photography while temperatures remain comfortable
Bicycle rental for a half-day city circuitMid-morning startMild 15°C temperatures are ideal for extended cycling without excessive effort
Boat tour of the river, bay, or canal networkLate morning departureComfortable weather makes open-deck boats viable without wind-chill concerns
Spend a morning in the national or city art museumOpens at 10am; arrive earlyWith 16 rain days expected, having a full-day indoor plan is practical insurance
Cooking class focused on regional cuisineHalf-day sessions run 10am-1pm or 3-6pmIndoor activity that fills a rainy half-day with genuine cultural content
Visit covered historical sites: cathedral, palace, or bazaarAny time; most crowded middayRoofed monuments and covered markets provide exploration without weather exposure
Visit the main botanical garden or city park at seasonal peakYear-round; best light in morningAugust brings distinct seasonal changes to public green spaces worth exploring
Warm up with traditional hot dishes: local stew, fondue, or braised specialities at a neighbourhood restaurantLunch (12-2pm) or dinner (7-9pm)Cold-weather cuisine is a genuine cultural experience and the best local restaurants serve their heartiest dishes in cooler months

Why is Tromso mild in August?

August in Tromso reflects a mid-latitude climate pattern, with temperatures averaging 15°C by day and 9°C overnight. The city sits at 70 degrees north latitude, where the balance between solar radiation and heat loss drives conditions that are neither extreme nor static. Conditions occupy the comfortable middle band of the annual temperature range, where outdoor activity is feasible without the extremes of midsummer heat or midwinter cold. Day-to-night temperature variation of 6°C is moderate and manageable with a single mid-layer. Climate data: Open-Meteo ERA5 (1991–2020).

Sunshine Hours

The average number of hours per day with direct sunlight. Calculated from satellite measurements. Days with more than 7 hours of sunshine are ideal for outdoor activities. Under 3 hours means overcast conditions dominate.

UV Index

A scale from 0-11+ measuring ultraviolet radiation intensity. UV 0-2: Minimal risk. UV 3-5: Moderate -- wear sunscreen. UV 6-7: High -- hat and SPF 30+ essential. UV 8-10: Very High -- limit midday exposure. UV 11+: Extreme -- seek shade between 10am-4pm.

Rain Days

A rain day is counted when precipitation exceeds 0.1mm. This threshold captures even light drizzle. Unlike total rainfall in mm, rain days tells you how often you might need an umbrella, which is useful for planning outdoor activities.

Humidity

Relative humidity as a percentage. Below 40%: Dry -- skin and throat may feel parched. 40-60%: Comfortable -- ideal for most people. 60-80%: Sticky -- light, breathable fabrics recommended. Above 80%: Muggy -- heat feels more intense; quick-dry clothing is essential.

Frequently Asked Questions: Tromso in August

In August, Tromso experiences average highs of 15°C (59°F) and lows of 9°C (48°F). Expect around 16 rainy days and 9 hours of sunshine per day, with humidity averaging 65%. The 6°C gap between daytime and overnight temperatures is worth planning around: light layers work for most visitors during the day, but an extra jacket is essential for evenings. UV index averages 10, so sun protection is advisable on clear days.

Tromso typically sees 16 rainy days in August, with total precipitation of around 102mm. This is a notably wet period. A waterproof jacket or compact umbrella is essential, and it is worth building indoor alternatives into your daily itinerary for the inevitable rainy stretches. For context, the driest month in Tromso typically sees 4-6 fewer rain days than August.

Pack a warm jacket, sweaters, and layering pieces for Tromso in August. Temperatures can drop to 9°C at night, so thermal underlayers are advisable for evening outings. Waterproof footwear is important with 16 rainy days expected. A scarf, hat, and gloves handle the windchill on clear cold days, which often feel colder than the thermometer reads.

August is a reasonable time to visit Tromso. Expect 16 rainy days, so pack a light rain layer for flexibility. Average temperatures of 15°C make outdoor exploration comfortable during the dry periods. With 9 daily sunshine hours, there are reliable windows of good weather to plan outdoor activities around, even if the month is not the driest on the calendar.

The average high temperature in Tromso in August is 15°C (59°F), and the average low is 9°C (48°F). The mean daily temperature is approximately 12°C (54°F). The day-to-night range of 6°C is moderate, meaning a single light jacket covers most situations. These are 30-year climate normals based on the 1991 to 2020 reference period; individual years will vary, particularly in transitional months like spring and autumn.

The best month to visit Tromso is generally June. June offers the most sunshine at 12 hours per day. Average temperatures reach 12°C, making it comfortable for sightseeing, outdoor dining, and exploring the city. If your travel dates are flexible, planning your trip around June gives you the best chance of dry, bright weather.

August is shoulder or low season in Tromso, meaning fewer tourists and generally lower prices than peak months. With 9 sunshine hours and 16 rainy days, the weather is less of a draw for mass tourism. This is an advantage for travellers who prefer a quieter, more relaxed experience with shorter queues and easier accommodation availability.

In August, Tromso suits a range of activities thanks to cool conditions around 15°C. With frequent rain, indoor activities and covered attractions are a smart choice. Top options include exploring historic neighbourhoods, visiting museums and galleries, local food markets, and day trips to surrounding areas. With 9 hours of sunshine, parks and waterfront walks are particularly enjoyable.

August ranks 5th sunniest of the year in Tromso, with an average 9 daily sunshine hours. The driest months are February, January, and April. July is the hottest month (16°C avg high); January is the coolest (-6°C). From here, temperatures fall 5°C into September. Compared to last month (July: 16°C high, 15 rain days), August is cooler and wetter. August sits in the middle of the annual sunshine ranking for Tromso, offering a reasonable balance of good weather and manageable crowds.

Year-Round Climate

Month	High	Low	Rain Days	Sun	Details
January	-6°C	-11°C	15	1h	View
February	-6°C	-10°C	14	2h	View
March	-3°C	-7°C	16	6h	View
April	2°C	-3°C	15	9h	View
May	7°C	1°C	16	11h	View
June	12°C	6°C	15	12h	View
July	16°C	10°C	15	11h	View
August	15°C	9°C	16	9h	View
September	10°C	6°C	17	6h	View
October	4°C	0°C	17	3h	View
November	-1°C	-6°C	15	1h	View
December	-4°C	-9°C	16	1h	View

Other Months in Tromso

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Plan Your Trip to Tromso

Best Time to Visit Tromso

Data Sources for Tromso

Tromso on Wikipedia Open-Meteo Climate API NOAA National Centers UK Met Office WMO GeoNames

Climate normals represent 30-year averages (1991-2020). Individual years may vary.