coastal destination · warmest in Jul · sea ~16°C in July · mid-range
Open Herttoniemenranta on the live value map →| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg °C | -5 | -6 | -2 | 3 | 10 | 15 | 17 | 15 | 10 | 5 | 1 | -3 |
| Sea °C | 2 | 1 | 1 | 2 | 6 | 11 | 16 | 17 | 14 | 10 | 7 | 4 |
| Rain (days) | 49 | 36 | 39 | 37 | 33 | 48 | 67 | 79 | 68 | 74 | 71 | 59 |
Warmest month: Jul. Driest: May.
No mild-temperature months (18–28°C) — expect extremes.