Weather Averages for Helsinki in December
| Average Temperature | 25°f (-4°c) |
| Average Low Temperature | 19°f (-7°c) |
| Average High Temperature | 30°f (-1°c) |
| Average Sea Temperature | N/A (3°c) |
| Average Precipitation | 58mm |
| Average Rainfall Days | 21 Days |
| Average Daily Sunshine Hours | 1 Hrs |
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