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Best time to visit Helsinki: month by month
Short answer
June to August is best, with highs of 20–21°C, almost endless daylight, open-air cafés and island ferries. Winter is cold and dark at around -1°C with 6 hours of light in December, but snow, Christmas markets and sea swimming after the sauna make it memorable. Spring and autumn are cool and quieter.
Month by month
| Month | High | Low | Rainy days | Crowds |
|---|---|---|---|---|
| Jan | -1°C | -5°C | 17 | low |
| Feb | -1°C | -7°C | 11 | low |
| Mar | 2°C | -5°C | 10 | low |
| Apr | 7°C | 0°C | 7 | low |
| May | 13°C | 5°C | 10 | medium |
| Jun | 20°C | 12°C | 7 | high |
| Jul | 21°C | 14°C | 12 | very high |
| Aug | 20°C | 14°C | 15 | high |
| Sep | 15°C | 9°C | 8 | medium |
| Oct | 9°C | 5°C | 14 | low |
| Nov | 4°C | 0°C | 15 | low |
| Dec | -2°C | -6°C | 15 | medium |
Temperatures and rainy days: Copernicus ERA5 averages, 2021–2023. Crowd levels are our estimate.
Season by season
Spring (Mar–May)
Highs rise from 2°C in March to 13°C in May, with lows from -5°C to 5°C and long days returning by May.
Summer (Jun–Aug)
Highs of 20–21°C, lows of 12–14°C, white nights around midsummer and 7–15 rainy days a month.
Autumn (Sep–Nov)
Highs fall from 15°C in September to 4°C in November, with grey, wet weather of 8–15 rainy days a month.
Winter (Dec–Feb)
Highs of -1 to -2°C, lows down to -7°C, snow and short days; the sea can freeze in harder winters.
Events worth planning around
- Vappu (May Day), with picnics and student celebrations (30 April–1 May).
- Midsummer, when the city empties for cottages (late June).
- Flow Festival (August).
- Helsinki Festival, arts and music (late August).
- St Thomas Christmas Market on the Esplanadi (December).
When to avoid
November is grey, dark and often snowless. Midsummer weekend is quiet, with many shops and restaurants closed.
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Common questions
What is the best month to visit Helsinki?
July or August: highs of 20–21°C, long days and island ferries running frequently.
Is Helsinki worth visiting in winter?
Yes, for snow, saunas with sea swimming and Christmas markets, though days are short and temperatures around -1°C or colder.
What happens in Helsinki at Midsummer?
Many Finns leave for their summer cottages, so the city is quiet and some shops close; islands such as Seurasaari hold bonfire celebrations.