Finland
Mariehamn sees feels-like daytime highs peak around 21.7°C in July and nighttime lows bottom out near -7.1°C in February. August is the wettest month (~52 mm), while February is the driest (~14 mm). For sunshine, July leads with about 58% clear skies.
Based on mild feels-like temperatures and low rain chances, the most comfortable months are July, August, and June — expect around 13.9–21.7°C with roughly 22% chance of rain on a given day in July.
| Month | Low / High °C | Rain % | Rainfall | Clear skies | Wind |
|---|---|---|---|---|---|
| January | -6.5° / -2.1° | 13% | 22 mm | 31% | 27.6 kph |
| February | -7.1° / -2.2° | 9% | 14 mm | 31% | 25.3 kph |
| March | -5.1° / 0.1° | 10% | 17 mm | 37% | 23.2 kph |
| April | -0.5° / 5.7° | 16% | 27 mm | 41% | 20.9 kph |
| May | 4.8° / 12.7° | 18% | 34 mm | 50% | 18.9 kph |
| June☀ | 10.3° / 18.1° | 20% | 44 mm | 56% | 18.5 kph |
| July☀ | 13.9° / 21.7° | 22% | 50 mm | 58% | 18.7 kph |
| August☀ | 12.7° / 20.5° | 26% | 52 mm | 53% | 20.5 kph |
| September | 7.9° / 14.3° | 25% | 48 mm | 50% | 23.4 kph |
| October | 3.7° / 8.3° | 27% | 49 mm | 41% | 26 kph |
| November | -0.7° / 3.6° | 25% | 43 mm | 33% | 27.4 kph |
| December | -4.2° / 0° | 19% | 31 mm | 33% | 28.3 kph |
Feels-like temperatures from long-term historical data; ☀ marks the most comfortable months (mild temperatures, low rain).
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