Weather Averages for Helsinki in May
| Average Temperature | 48°f (9°c) |
| Average Low Temperature | 37°f (3°c) |
| Average High Temperature | 57°f (14°c) |
| Average Sea Temperature | N/A (5°c) |
| Average Precipitation | 35mm |
| Average Rainfall Days | 11 Days |
| Average Daily Sunshine Hours | 8 Hrs |
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