Mariehamn Weather in December

During December, Mariehamn experiences low daytime temperatures of 5°C (41°F) and cooler nights around 1°C (34°F). Expect quite a bit of rainfall. Around 62 mm (2.4 in) is typical.

Rainfall in Mariehamn in December

You can expect rain on around 19 days based on historical patterns, with 62 mm (2.4 in) average for the month. This is a month with many wet days but modest rainfall totals, so showers are generally light and easy to manage.

Temperature in Mariehamn in December

In December, Mariehamn gets low temperatures, with highs of 5°C (41°F). Nights cool to around 1°C (34°F). Even daytime conditions remain cold, making layers, a warm coat, and winter accessories a good idea. With overnight lows of 1°C (34°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets. Expect freezing temperatures this month, so ensure you have plenty of warm clothing. It's important to be prepared.

December in Mariehamn can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.