June
★ Best time
19° / 11°C
12 rain days
mild, rainy
- comfortable temperatures (avg high 19°C / 66°F)
Best time to visit Helsinki
Helsinki, Finland — ranked month by month from data: temperature, rainfall, snow, and peak hazard seasons. The standouts: June, July, August.
★ Best months to visit
July
★ Best time
22° / 14°C
12 rain days
warm, rainy
- comfortable temperatures (avg high 22°C / 72°F)
- warm evenings without humidity overload
August
★ Best time
20° / 13°C
13 rain days
mild, rainy
- comfortable temperatures (avg high 20°C / 68°F)
May
★ Best time
15° / 5°C
11 rain days
cool, rainy
September
★ Best time
15° / 8°C
13 rain days
cool, rainy
OK — shoulder months
October
OK
8° / 3°C
15 rain days
chilly, rainy
April
OK
8° / 0°C
11 rain days
2 snow days
chilly, freezing nights, rainy
Months to skip
November
Skip
3° / -1°C
16 rain days
5 snow days
cold, freezing nights, very wet, snowy
- freezing at night (-1°C)
- heavy rain expected (16 days)
- 5 snow days expected
March
Skip
1° / -5°C
12 rain days
7 snow days
cold, freezing nights, rainy, snowy
- freezing at night (-5°C)
- 7 snow days expected
December
Skip
-1° / -5°C
17 rain days
9 snow days
cold, freezing nights, very wet, snowy
- freezing at night (-5°C)
- heavy rain expected (17 days)
- 9 snow days expected
February
Skip
-3° / -8°C
15 rain days
11 snow days
cold, freezing nights, rainy, snowy
- bitterly cold (overnight -8°C)
- heavy rain expected (15 days)
- 11 snow days expected
January
Skip
-3° / -7°C
17 rain days
11 snow days
cold, freezing nights, very wet, snowy
- bitterly cold (overnight -7°C)
- heavy rain expected (17 days)
- 11 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.