July
Best time
16°C / 9°C
11 rain days
mild, rainy
Best time to visit Tromsø
Tromsø, Norway — ranked month by month from data: temperature, rainfall, snow, and peak hazard seasons. The standouts: July, August.
About Tromsø
Tromsø is a city in Tromsø Municipality in Troms county, Norway. The city is the administrative centre of the municipality and the county. The city is located on the island of Tromsøya which sits in the Tromsøysundet strait, just off the mainland of Northern Norway.
— condensed from Wikipedia
Best months to visit
August
Best time
15°C / 9°C
12 rain days
cool, rainy
OK — shoulder months
June
OK
12°C / 5°C
10 rain days
cool, rainy
- manageable rain (10 days)
September
OK
10°C / 5°C
12 rain days
1 snow days
cool, rainy
May
OK
7°C / 1°C
9 rain days
1 snow days
chilly
- manageable rain (9 days)
Months to skip
October
Skip
4°C / 0°C
15 rain days
3 snow days
cold, freezing nights, rainy, snowy
- heavy rain expected (15 days)
April
Skip
2°C / -3°C
10 rain days
4 snow days
cold, freezing nights, rainy, snowy
- freezing at night (-3°C)
November
Skip
1°C / -3°C
14 rain days
8 snow days
cold, freezing nights, rainy, snowy
- freezing at night (-3°C)
- heavy rain expected (14 days)
- 8 snow days expected
March
Skip
-1°C / -6°C
12 rain days
8 snow days
cold, freezing nights, rainy, snowy
- bitterly cold (overnight -6°C)
- 8 snow days expected
December
Skip
-1°C / -5°C
15 rain days
11 snow days
cold, freezing nights, rainy, snowy
- freezing at night (-5°C)
- heavy rain expected (15 days)
- 11 snow days expected
February
Skip
-2°C / -7°C
13 rain days
10 snow days
cold, freezing nights, rainy, snowy
- bitterly cold (overnight -7°C)
- 10 snow days expected
January
Skip
-2°C / -7°C
15 rain days
12 snow days
cold, freezing nights, rainy, snowy
- bitterly cold (overnight -7°C)
- heavy rain expected (15 days)
- 12 snow days expected
How we ranked these
Each month is scored on temperature comfort (18–27°C avg high is the sweet spot), rainfall (more rain days = lower score), snow days, and peak hazard seasons (hurricanes, monsoons, etc.). Green-tier months are within ideal range with no major issues. Yellow are workable but with trade-offs. Red has at least one significant problem — extreme heat or cold, heavy rain, or peak storm season.