Helsinki month by month
Plan your visit to Helsinki by month. Compare weather, crowds, events, and prices across all twelve months with historical climate data.
Helsinki's year runs from -1°C in January to 22°C in July. February matches January at -1°C. March warms to 2°C, April to 7°C, May to 14°C. June and August both average 20°C. September still holds 16°C before October falls to 10°C, November to 5°C, December to 0°C. January also leads in precipitation with 16 rain days, the most of any month. March, April, May, and September are the driest at 9 each. August records 14 rain days, and July logs 12.
All 12 month guides sit beneath this index. April averages 7°C with 9 rain days. May reaches 14°C with the same 9. Then June crosses 20°C. For a summer visit, compare the June, July, and August pages. July is warmest at 22°C but carries 12 rain days. June offers 20°C with 10. March through May and September share the year's lowest rain count at 9 days. Temperatures across those months range from 2°C to 16°C. If you're visiting in winter, open January first. Its -1°C high and 16 rain days set the floor.
January stands apart in Helsinki's year with 16 rain days and an average high of -1°C.
- January
- High
- -1°C
- Low
- -6°C
- Rain
- 81 mm
January in Helsinki is dark. The sun climbs above the horizon after 9:00 in the morning and drops back down before 3:30 in the afternoon, giving you roughly 6 hours of weak,…
- February
- High
- -1°C
- Low
- -6°C
- Rain
- 56 mm
February in Helsinki is the month the darkness starts to retreat, though the cold has no intention of following. The average high sits at -1°C (30°F), lows drop to -6°C (21°F), and…
- March
- High
- 2°C
- Low
- -3°C
- Rain
- 42 mm
March in Helsinki belongs to the returning light. After months of near-darkness, daylight stretches from roughly 10 hours on March 1 to over 13 hours by March 31. That 3-hour gain…
- April
- High
- 7°C
- Low
- 0°C
- Rain
- 51 mm
April in Helsinki is defined by one thing above all others. Daylight. The city goes from roughly 14 hours of sun on April 1 to nearly 17 hours by the 30th, gaining about 7 minutes…
- May
- High
- 14°C
- Low
- 6°C
- Rain
- 50 mm
The single most important thing about Helsinki in May is Vappu. Finland's biggest street celebration falls on May 1st, and it turns the normally reserved capital into a citywide…
- June
- High
- 20°C
- Low
- 12°C
- Rain
- 53 mm
Helsinki in June runs on roughly 19 hours of direct sunlight, and around the summer solstice on June 20-21, the sky never fully darkens. You feel it the moment you step outside at…
- July
- High
- 22°C
- Low
- 15°C
- Rain
- 72 mm
July is when Helsinki finally exhales. The sun stays above the horizon for roughly 19 hours, and even at its lowest point around 11pm it barely dips below the treeline, leaving the…
- August
- High
- 20°C
- Low
- 14°C
- Rain
- 101 mm
August is Helsinki's rainiest month, with about 101mm of precipitation across roughly 14 days. That single fact shapes everything about visiting now. The showers tend to arrive in…
- September
- High
- 16°C
- Low
- 10°C
- Rain
- 73 mm
September in Helsinki is the moment summer lets go. You'll feel it in the light first. By mid-month, the city loses about 6 minutes of daylight every day, dropping from roughly 14…
- October
- High
- 10°C
- Low
- 6°C
- Rain
- 83 mm
October in Helsinki is when the light starts to leave. By October 31, sunset lands around 4:45pm and sunrise doesn't come until after 8am, giving you roughly 8 hours of usable…
- November
- High
- 5°C
- Low
- 1°C
- Rain
- 72 mm
November in Helsinki is dark. That is the single most important thing to know before booking a flight. By the last week of the month, the sun rises around 9:15 AM and drops below…
- December
- High
- 0°C
- Low
- -4°C
- Rain
- 69 mm
December in Helsinki is defined by darkness. The city receives roughly 6 hours of daylight, with sunrise around 9:20 AM and sunset near 3:15 PM. Temperatures hover around 0.4°C…