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The climate of Helsinki is influenced mainly by the influence of the continental climate, but in the city, which is located along the coast, are also felt the mild influence of the Baltic Sea. In winter the water of the Gulf of Finland in front of the city freezes completely.
The winters are long and cold, very dark with short days. Snow is common in winter, generally falls between December and March, fall an average of 72 cm of snow per year. Snow, on average, remained on the ground for about 130 days a year. The winter skies are often dark and leaden.
Winter temperatures are rigid, the average minimum temperatures remain below freezing between November and March, February is the coldest month with -9°C. The average maximum temperatures of the winter months vary between 1°C and -3°C.
The summers are characterized by very long days and short nights. Summer temperatures are mild, the average maximum temperatures vary between 20°C and 22°C, while the average minimum temperatures vary between 9°C and 12°C.
The rains are not abundant and are more frequent in the months between July and December, while decreased between February and May. The average annual rainfall is about 680 mm. Rainy days are on average 205 per year.
WHEN TO GO TO HELSINKI
The best time to visit the city of Helsinki are the months with milder temperatures between May and September.
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THE CLIMATE OF HELSINKI: CLIMATE TABLES
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| HELSINKI (55 meters) | ||||
| Month | Average low (°C) | Average high (°C) | Precip. (mm) | Precip. days |
| January | -8,1 | -2,4 | 54 | 23 |
| February | -8,9 | -2,7 | 37 | 20 |
| March | -5,4 | 1,5 | 37 | 17 |
| April | -0,2 | 8,7 | 32 | 12 |
| May | 4,8 | 15,8 | 39 | 12 |
| June | 9,5 | 19,6 | 61 | 14 |
| July | 12,6 | 22,5 | 66 | 13 |
| August | 11,3 | 20,5 | 79 | 15 |
| September | 6,9 | 14,8 | 64 | 16 |
| October | 2,7 | 8,6 | 82 | 18 |
| November | -2,1 | 2,6 | 73 | 21 |
| December | -6,0 | -0,7 | 58 | 24 |
| YEAR | 1,4 | 9,1 | 682 | 205 |
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