Best time to visit Helsinki
The best months to visit Helsinki are July, August and June, based on month-by-month temperature and rainfall data. The full year of weather, daylight, holidays, and festival timing is below.
July, August and June score best for Helsinki weather:
- June19° / 10°CJune brings white nights near 19 hours of daylight, with Juhannus timing shaping Suomenlinna, saunas, and island plans.
- July22° / 14°CJuly keeps very long daylight near 18 hours, ideal for ferries, parks, swimming decks, and late Kallio evenings.
- August21° / 13°CAugust still has long daylight near 15 hours, but showers make Kiasma, Ateneum, and sauna backups useful.
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By TripSapien Research · Updated May 20, 2026
Helsinki weather by month
| Month | High | Low | Rain (mm) | Rainy days | Daylight | Sea |
|---|---|---|---|---|---|---|
| January | -1° | -6° | 60 | 12 | 6h | 1° |
| February | -1° | -7° | 45 | 9 | 9h | 0° |
| March | 2° | -4° | 35 | 8 | 11h | 2° |
| April | 9° | 0° | 35 | 7 | 14h | 6° |
| May | 15° | 6° | 35 | 7 | 17h | 10° |
| JuneBest weather | 19° | 10° | 60 | 9 | 19h | 16° |
| JulyBest weather | 22° | 14° | 55 | 7 | 18h | 19° |
| AugustBest weather | 21° | 13° | 80 | 10 | 15h | 19° |
| September | 16° | 8° | 55 | 9 | 13h | 17° |
| October | 9° | 4° | 75 | 10 | 10h | 10° |
| November | 4° | 0° | 75 | 12 | 7h | 7° |
| December | 1° | -4° | 65 | 12 | 6h | 4° |
Temperatures in °C. Long-term monthly averages.
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Helsinki month by month
January
Helsinki in January: -1.1°C high, -6.4°C low, 60mm rain over 12 days, 6.3h daylight. Cold and clearer — short daylight but skies open. Aurora season.
Lux Helsinki (17:00-22:00) · New Year's Eve (Dec 31–Jan 1)
February
Helsinki in February: -1.5°C high, -7.1°C low, 45mm rain over 9 days, 8.8h daylight. Cold and clearer — short daylight but skies open. Aurora season.
March
Helsinki in March: 2.3°C high, -4.3°C low, 35mm rain over 8 days, 11.3h daylight. Cold and clearer — short daylight but skies open. Aurora season.
April
Helsinki in April: 8.5°C high, 0.4°C low, 35mm rain over 7 days, 14.2h daylight. Mild and dry — shoulder-season sweet spot.
Vappu (April 30-May 1)
May
Helsinki in May: 15.1°C high, 5.6°C low, 35mm rain over 7 days, 16.9h daylight. Mild and dry — shoulder-season sweet spot.
Vappu (April 30-May 1) · World Village Festival · Helsinki City Run
JuneBest weather
Helsinki in June: 19.3°C high, 10.4°C low, 60mm rain over 9 days, 18.5h daylight. Mild and dry — shoulder-season sweet spot. White nights.
Helsinki-päivä (Jun 12) · Helsinki Pride (Parade 13:00–14:00, party 14:00–18:00) · Helsinki Samba Carnaval (15:00–17:00)
JulyBest weather
Helsinki in July: 22.3°C high, 13.7°C low, 55mm rain over 7 days, 17.8h daylight. Mild and dry — shoulder-season sweet spot.
Teurastamo Jazz (July) · Hori Smoku Summer Bugaloo (July) · Jazz-Espa
AugustBest weather
Helsinki in August: 20.8°C high, 12.5°C low, 80mm rain over 10 days, 15.4h daylight. Mild and dry — shoulder-season sweet spot.
Flow Festival · Finland-Sweden athletics competition (biannually held in Finland) · Helsinki Festival
September
Helsinki in September: 15.6°C high, 8.3°C low, 55mm rain over 9 days, 12.5h daylight. Mild and dry — shoulder-season sweet spot. Aurora season.
Helsinki International Film Festival
October
Helsinki in October: 9°C high, 3.5°C low, 75mm rain over 10 days, 9.7h daylight. Mild and dry — shoulder-season sweet spot. Aurora season.
November
Helsinki in November: 4°C high, -0.4°C low, 75mm rain over 12 days, 7h daylight. Cold and clearer — short daylight but skies open. Aurora season.
Lautapelaamaan (10:00-18:00 mostly) · Liquorice and salmiak festival (11:00-17:00 mostly) · Slush (Mid-November or early December)
December
Helsinki in December: 1°C high, -3.7°C low, 65mm rain over 12 days, 5.5h daylight. Cold and clearer — short daylight but skies open. Aurora season.
Slush (Mid-November or early December) · Joulu · New Year's Eve (Dec 31–Jan 1)
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