Tromsø weather by month
Average daily high and low, total rainfall and days with at least 2.5 mm of rain.
| Month | High / low | Rain | Verdict |
|---|---|---|---|
| January | -1°C / -5°C | 105 mm · 11 days | Cold |
| February | -1°C / -5°C | 101 mm · 10 days | Cold |
| March | 1°C / -4°C | 123 mm · 13 days | Cold |
| April | 5°C / -1°C | 87 mm · 11 days | Cold |
| May | 10°C / 3°C | 61 mm · 8 days | Cold |
| June | 13°C / 6°C | 60 mm · 7 days | Fair |
| July | 17°C / 9°C | 72 mm · 7 days | Fair |
| August | 16°C / 9°C | 81 mm · 9 days | Fair |
| September | 12°C / 6°C | 96 mm · 11 days | Cold |
| October | 6°C / 1°C | 113 mm · 12 days | Cold |
| November | 2°C / -2°C | 104 mm · 11 days | Cold |
| December | 1°C / -4°C | 113 mm · 11 days | Cold |
Tromsø by season
Spring
March and April bring long days with lots of snow, ideal for skiing, snowshoeing and the last northern lights of the season.
- + Snowy landscapes and sunshine
- + Last aurora chances in March
- + Great ski touring
- − Aurora season ends by April
- − Snowmelt makes trails slushy in May
Summer
Summer brings the midnight sun, green mountains and mild temperatures, perfect for hiking, kayaking and island road trips.
- + Midnight sun
- + Hiking and kayaking
- + Festivals
- − No northern lights
- − Mosquitoes in some areas
Autumn
Autumn arrives early, with golden colours in September and the first aurora displays over still-unfrozen lakes.
- + Aurora season begins
- + Autumn colours
- + Fewer tourists
- − Rainy days
- − Rapidly shortening days
Winter
Winter is the peak season: snow-covered landscapes, polar night from late November to mid-January, and the best chance of northern lights.
- + Northern lights
- + Husky and reindeer sledding
- + Magical polar night light
- − Very short or no daylight
- − Cold and icy streets
Tromsø month by month
Tromsø in January
ColdIn January, Tromsø averages highs of -1°C and lows of -5°C, with about 11 rainy days and 105 mm of rain. It is cold, so pack warm layers.
Tromsø in February
ColdIn February, Tromsø averages highs of -1°C and lows of -5°C, with about 10 rainy days and 101 mm of rain. It is cold, so pack warm layers.
Tromsø in March
ColdIn March, Tromsø averages highs of 1°C and lows of -4°C, with about 13 rainy days and 123 mm of rain. It is cold, so pack warm layers.
Tromsø in April
ColdIn April, Tromsø averages highs of 5°C and lows of -1°C, with about 11 rainy days and 87 mm of rain. It is cold, so pack warm layers.
Tromsø in May
ColdIn May, Tromsø averages highs of 10°C and lows of 3°C, with about 8 rainy days and 61 mm of rain. It is cold, so pack warm layers.
Tromsø in June
FairIn June, Tromsø averages highs of 13°C and lows of 6°C, with about 7 rainy days and 60 mm of rain. Expect mixed weather, with comfortable spells.
Tromsø in July
FairIn July, Tromsø averages highs of 17°C and lows of 9°C, with about 7 rainy days and 72 mm of rain. Expect mixed weather, with comfortable spells.
Tromsø in August
FairIn August, Tromsø averages highs of 16°C and lows of 9°C, with about 9 rainy days and 81 mm of rain. Expect mixed weather, with comfortable spells.
Tromsø in September
ColdIn September, Tromsø averages highs of 12°C and lows of 6°C, with about 11 rainy days and 96 mm of rain. It is cold, so pack warm layers.
Tromsø in October
ColdIn October, Tromsø averages highs of 6°C and lows of 1°C, with about 12 rainy days and 113 mm of rain. It is cold, so pack warm layers.
Tromsø in November
ColdIn November, Tromsø averages highs of 2°C and lows of -2°C, with about 11 rainy days and 104 mm of rain. It is cold, so pack warm layers.
Tromsø in December
ColdIn December, Tromsø averages highs of 1°C and lows of -4°C, with about 11 rainy days and 113 mm of rain. It is cold, so pack warm layers.
Plan your Tromsø trip
Best time to visit Tromsø: FAQ
What is the best month to visit Tromsø?+
July is the most comfortable month on average, with highs of 17°C. August and June are close behind.
What is the rainiest month in Tromsø?+
March is the wettest month, with about 123 mm of rain.
How hot does Tromsø get?+
July is the warmest month, with average highs of 17°C and lows of 9°C. The coldest nights come in January, averaging -5°C.
Averages for 2006–2025 from the TROMSO weather station (1 km from the centre), NOAA Global Historical Climatology Network. Verdicts rate sightseeing comfort from daytime highs and rainy days.