AI-generatedTromsø at a glance
- Best time
- Jul
- Warmest month
- Jul · 16°
- Warmest sea
- Aug · 11.2°
- Sunshine a year
- 1,450 h
- Rain a year
- 1,202 mm
- Climate
- Continental
- Time zone
- UTC+1 / UTC+2
- Elevation
- 0 m
Climate in Tromsø
Tromsø has warm to hot summers and cold winters with occasional snow. July is the warmest month with average highs of 16 °C, while January is the coolest at −5 °C. With around 1,450 hours of sunshine a year, Tromsø is rather dull; June is the sunniest month with 8.1 hours a day.
Holiday weather through the year
Weather in October
Holiday weather in October
Poor
Best time to visit: July
A typical day in October
- Morning, 08:00: about 1°
- Midday, 13:00: about 4°
- Afternoon, 16:00: about 4°
- Evening, 20:00: about 3°
- Night, 23:00: about 2°
07:5117:09
Cold evenings: bring a warm jacket.
Estimated from the average high and low: coolest around sunrise, warmest in mid-afternoon.
What is the weather like in Tromsø in October?
In October, Tromsø is cold: daytime highs average 5 °C, and nights cool down to about 0 °C. The sea averages 8.9 °C – swimming is only for the hardy. The sun is scarce, with only about 2 hours a day. It rains often – on about 17 days, adding up to 122 mm. Snow falls on about 6 days. All in all, October is not an ideal month for a holiday in Tromsø.
More details for October
- Daylight
- 9 h 18 min07:51 – 17:09
- UV index
- 0 · lowclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or more
- Wind
- 15 km/haverage daily peak
- Cloud cover
- 76 %on average
- Hot days
- 0 days30 °C or more
- Snow days
- 6 days1 cm or more of fresh snow
- Time zone
- UTC+2Europe/Oslo
How the score comes together
- Temperatureweight 50 %0 %
- Sunshineweight 20 %0 %
- Few rainy daysweight 30 %7 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Nature escape”.
What to pack in October
- Warm jacket
- Hat, scarf & gloves
- Rain jacket or umbrella
Sea temperature in Tromsø
Monthly sea surface temperature with the range of cooler and warmer years.
8 in 10 years: 8.2 – 10.1 °C
Swimming season: Never above 20 °C
- cold
- fresh
- refreshing
- pleasant
- warm
- very warm
The sea temperature in Tromsø ranges from 4.0 °C in March to 11.2 °C in August. Even at its warmest the sea stays below 20 °C, so swimming is bracing at best.
The sea warms up slowly: it is warmest in August, while the air already peaks in July. From October to April the sea is even warmer than the afternoon air. The sea temperature varies from year to year: in August, eight out of ten years were between 9.9 and 12.6 °C.
| Month | Average | Cool year | Warm year | Feels |
|---|---|---|---|---|
| JanuaryJan | 5.3° | 4.4° | 6.0° | cold |
| FebruaryFeb | 4.4° | 3.7° | 5.2° | cold |
| MarchMar | 4.0° | 3.4° | 4.8° | cold |
| AprilApr | 4.3° | 3.7° | 4.9° | cold |
| MayMay | 5.8° | 5.3° | 6.4° | cold |
| JuneJun | 7.9° | 7.3° | 8.4° | cold |
| JulyJul | 10.3° | 9.3° | 11.2° | cold |
| AugustAug | 11.2° | 9.9° | 12.6° | cold |
| SeptemberSep | 10.3° | 9.5° | 11.0° | cold |
| OctoberOct | 8.9° | 8.2° | 10.1° | cold |
| NovemberNov | 7.6° | 6.9° | 8.7° | cold |
| DecemberDec | 6.3° | 5.7° | 7.3° | cold |
Sunshine hours in Tromsø
Average hours of bright sunshine per day, next to the length of the day. Tap a month to select it.
In October, the sun shines for about 2.2 of 9.3 hours of daylight in Tromsø, 24 % of the day.
Sunshine hours: estimated from radiation data (ERA5, 1996–2025) and calibrated against measured station values; no weather station is close enough here. Daylight is the time from sunrise to sunset on the 15th of the month.
UV index in Tromsø
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 0 · lowLittle protection needed; sunglasses on bright days.
The sun is strongest in June (UV 4).
Minutes until sunburn in October
- Very fair skin
- over 2 h
- Fair skin
- over 2 h
- Light brown skin
- over 2 h
- Olive skin
- over 2 h
Rough guide for unprotected skin at noon under a clear sky; clouds lengthen it, water, sand and snow shorten it. Sunscreen extends the time only partly.
Monthly values: clear-sky noon estimate from the sun's angle, ozone and altitude. UV today: Open-Meteo forecast.
Rain in Tromsø: rainy days and rainfall
A rainy day is a day with at least 1 mm of rain or snow; the amount is what falls in the whole month. Tap a month to select it.
In October, Tromsø has about 17 rainy days with 122 mm of rain in total.
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Temperatures through the year
Average daytime high, night-time low and sea temperature per month.
| Month | Score | Day | Night | Sea | Sun | Rain days | Rain mm |
|---|---|---|---|---|---|---|---|
| JanuaryJan | 7 | −5° | −10° | 5.3° | 0.0 h | 15 | 105 |
| FebruaryFeb | 8 | −5° | −9° | 4.4° | 1.6 h | 15 | 98 |
| MarchMar | 8 | −2° | −7° | 4.0° | 4.1 h | 16 | 103 |
| AprilApr | 18 | 2° | −3° | 4.3° | 6.7 h | 16 | 89 |
| MayMay | 20 | 8° | 2° | 5.8° | 7.7 h | 16 | 90 |
| JuneJun | 46 | 12° | 7° | 7.9° | 8.1 h | 15 | 91 |
| JulyJul | 69 | 16° | 10° | 10.3° | 7.5 h | 13 | 85 |
| AugustAug | 53 | 15° | 10° | 11.2° | 5.6 h | 15 | 102 |
| SeptemberSep | 20 | 11° | 6° | 10.3° | 3.8 h | 17 | 127 |
| OctoberOct | 2 | 5° | 0° | 8.9° | 2.2 h | 17 | 122 |
| NovemberNov | 7 | −1° | −5° | 7.6° | 0.2 h | 15 | 93 |
| DecemberDec | 6 | −3° | −8° | 6.3° | 0.0 h | 15 | 97 |
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0)
69.65° N, 18.96° E · 0 m · Europe/Oslo
Best time to visit Tromsø
The best time to visit Tromsø is in July. The sea stays too cool for a classic beach holiday: even in August it only reaches 11.2 °C. The wettest month is September with 127 mm of precipitation.
Tromsø through the seasons
How the weather changes over the seasons, with averages for each.
Tromsø in spring
Mar – May
Poor
- -2–8 °C by day
- Sea 5 °C
- 6 h of sun a day
- 47 rainy days in all
Tromsø in summer
Jun – Aug
Fair
- 12–16 °C by day
- Sea 10 °C
- 7 h of sun a day
- 43 rainy days in all
Tromsø in autumn
Sep – Nov
Poor
- 0–11 °C by day
- Sea 9 °C
- 2 h of sun a day
- 49 rainy days in all
Tromsø in winter
Dec – Feb
Poor
- -5–-3 °C by day
- Sea 5 °C
- 1 h of sun a day
- 44 rainy days in all
Find your perfect month
Tell us what you like and we rate every month in Tromsø for you.
Your best months: July
Based on the climate averages; tap a month to see its details.
Which month for what?
Beach & swimming
No month
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
No month
15–28 °C and not too much rain
Rainy months
All year
12 or more rainy days
Snow
Oct – May
Snow on 2 or more days
Tromsø month by month
The typical weather for every month at a glance.
7January-5° · Sea 5° · 0 h
In January, Tromsø is freezing cold: daytime highs average −5 °C, and nights often drop below freezing (−10 °C). The sea averages 5.3 °C – swimming is only for the hardy. The sun is scarce, with only about 0 hours a day. Precipitation, often as snow, falls on about 15 days, totalling 105 mm. Snow falls on about 13 days. All in all, January is not an ideal month for a holiday in Tromsø.
Tromsø in January8February-4° · Sea 4° · 2 h
In February, Tromsø is freezing cold: daytime highs average −5 °C, and nights often drop below freezing (−9 °C). The sea averages 4.4 °C – swimming is only for the hardy. The sun is scarce, with only about 2 hours a day. Precipitation, often as snow, falls on about 15 days, totalling 98 mm. Snow falls on about 13 days. All in all, February is not an ideal month for a holiday in Tromsø.
Tromsø in February8March-2° · Sea 4° · 4 h
In March, Tromsø is freezing cold: daytime highs average −2 °C, and nights often drop below freezing (−7 °C). The sea averages 4.0 °C – swimming is only for the hardy. Expect around 4 hours of sunshine a day. Precipitation, often as snow, falls on about 16 days, totalling 103 mm. Snow falls on about 14 days. All in all, March is not an ideal month for a holiday in Tromsø.
Tromsø in March18April2° · Sea 4° · 7 h
In April, Tromsø is freezing cold: daytime highs average 2 °C, and nights often drop below freezing (−3 °C). The sea averages 4.3 °C – swimming is only for the hardy. The sun shines for around 7 hours a day. Precipitation, often as snow, falls on about 16 days, totalling 89 mm. Snow falls on about 11 days. All in all, April is not an ideal month for a holiday in Tromsø.
Tromsø in April20May8° · Sea 6° · 8 h
In May, Tromsø is cold: daytime highs average 8 °C, and nights cool down to about 2 °C. The sea averages 5.8 °C – swimming is only for the hardy. The sun shines for around 8 hours a day. It rains often – on about 16 days, adding up to 90 mm. Snow falls on about 4 days. All in all, May is not an ideal month for a holiday in Tromsø.
Tromsø in May46June12° · Sea 8° · 8 h
In June, Tromsø is cool: daytime highs average 12 °C, and nights cool down to about 7 °C. The sea averages 7.9 °C – swimming is only for the hardy. The sun shines for around 8 hours a day. It rains often – on about 15 days, adding up to 91 mm. All in all, June is a so-so month for a holiday in Tromsø.
Tromsø in June69July16° · Sea 10° · 8 h
In July, Tromsø is cool: daytime highs average 16 °C, and nights cool down to about 10 °C. The sea averages 10.3 °C – swimming is only for the hardy. The sun shines for around 8 hours a day. Rain is frequent, with about 13 rainy days and 85 mm in total. All in all, July is a good month for a holiday in Tromsø.
Tromsø in July53August15° · Sea 11° · 6 h
In August, Tromsø is cool: daytime highs average 15 °C, and nights cool down to about 10 °C. The sea averages 11.2 °C – swimming is only for the hardy. Expect around 6 hours of sunshine a day. It rains often – on about 15 days, adding up to 102 mm. All in all, August is a so-so month for a holiday in Tromsø.
Tromsø in August20September11° · Sea 10° · 4 h
In September, Tromsø is cool: daytime highs average 11 °C, and nights cool down to about 6 °C. The sea averages 10.3 °C – swimming is only for the hardy. The sun is scarce, with only about 4 hours a day. It rains often – on about 17 days, adding up to 127 mm. All in all, September is not an ideal month for a holiday in Tromsø.
Tromsø in September2October5° · Sea 9° · 2 h
In October, Tromsø is cold: daytime highs average 5 °C, and nights cool down to about 0 °C. The sea averages 8.9 °C – swimming is only for the hardy. The sun is scarce, with only about 2 hours a day. It rains often – on about 17 days, adding up to 122 mm. Snow falls on about 6 days. All in all, October is not an ideal month for a holiday in Tromsø.
Tromsø in October7November0° · Sea 8° · 0 h
In November, Tromsø is freezing cold: daytime highs average −1 °C, and nights often drop below freezing (−5 °C). The sea averages 7.6 °C – swimming is only for the hardy. The sun is scarce, with only about 0 hours a day. Precipitation, often as snow, falls on about 15 days, totalling 93 mm. Snow falls on about 9 days. All in all, November is not an ideal month for a holiday in Tromsø.
Tromsø in November6December-3° · Sea 6° · 0 h
In December, Tromsø is freezing cold: daytime highs average −3 °C, and nights often drop below freezing (−8 °C). The sea averages 6.3 °C – swimming is only for the hardy. The sun is scarce, with only about 0 hours a day. Precipitation, often as snow, falls on about 15 days, totalling 97 mm. Snow falls on about 13 days. All in all, December is not an ideal month for a holiday in Tromsø.
Tromsø in DecemberTromsø compared
Put Tromsø side by side with another destination.
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Tromsø vs. Rovaniemi
In October Rovaniemi has the better holiday weather (score 16 vs. 2). During the day Rovaniemi is 1 °C cooler than Tromsø.
| in October | Tromsø | Rovaniemi |
|---|---|---|
| Holiday score | 2 | 16 |
| Daytime high | 5° | 4° |
| Sea | 9° | – |
| Sunshine | 2 h | 2 h |
| Rainy days | 17 | 11 |
| Best time | Jul | Jun – Aug |
Through the year
Norway in October: the best places
In October, Tromsø ranks 3 of 3 destinations in this country.
All destinations: NorwayPlanning a trip to Tromsø
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Getting there
Flying from
- Nonstop flight
- about 3 h 15 min
- Distance
- 2,260 km
- Time zone
- UTC+2
Estimated from the straight-line distance: 30 minutes for take-off and landing plus 830 km/h cruising speed.
Frequently asked questions about Tromsø
When is the best time to visit Tromsø?
The best time to visit Tromsø is in July. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
How warm is the sea in Tromsø?
The sea temperature in Tromsø ranges from 4.0 °C in March to 11.2 °C in August. Even at its warmest the sea stays below 20 °C, so swimming is bracing at best.
Can you swim in Tromsø in October?
Only if you don't mind cold water: in October the sea averages just 8.9 °C. Comfortable swimming temperatures are not reached at any time of year.
What is the warmest month in Tromsø?
July is the warmest month, with average highs of 16 °C and nights around 10 °C. January is the coolest month at −5 °C.
When does it rain most in Tromsø?
The wettest month is September with 127 mm of precipitation. The driest month is July with 85 mm.
How many hours of sunshine does Tromsø get?
Tromsø gets around 1,450 hours of sunshine a year. The sunniest month is June with 8.1 hours a day; in January there are 0.0 hours a day.
What time zone is Tromsø in?
Tromsø uses the time zone Europe/Oslo: UTC+1 in January and UTC+2 in July.
How long is the flight from London to Tromsø?
A nonstop flight from London to Tromsø takes about 3 h 15 min, for a straight-line distance of about 2,260 km.
Near Tromsø
Other destinations close by.
Places with a climate like Tromsø
Destinations whose weather through the year is closest to Tromsø's – good alternatives.