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Mariehamn Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Mariehamn.
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Climate overview of Mariehamn
Temperatures in Mariehamn, Åland Islands, Finland, vary greatly throughout the year. August is the hottest month at 20°C (68°F), while February is the coldest at 1°C (34°F).
The city receives around 613 mm (24 in) of rain/snowfall per year. It experiences a distinct dry season from February to May, with pleasant summers and very cold winters. October is the wettest month and March the driest.
Mariehamn Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Mariehamn - and find the best time to visit.
Monthly Temperature in Mariehamn
The climate in Mariehamn is known for significant temperature differences throughout the year, making the weather dynamic. On average, daytime temperatures range from a pleasant 20°C (68°F) in August to a very cold 1°C (34°F) in February.
Nighttime temperatures range from 15°C (59°F) in August to -3°C (27°F) in February.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Mariehamn
Generally, Mariehamn receives mid-range precipitation levels, with 613 mm (24 in) annually. The amount of precipitation varies moderately throughout the year. The wettest month, October, sees around 67 mm (2.6 in) of rainfall, perfect for those who enjoy a bit of rain now and then. The driest month, March, still receives a respectable 33 mm (1.3 in) of snow/rainfall. For more details, please visit our Mariehamn Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit Mariehamn
The most comfortable overall weather for exploring Mariehamn is usually found in July and August. Conditions are generally least comfortable in January, February, March, April, November and December.
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
Jan
cold
Feb
cold
Mar
cold
Apr
cold
May
mixed
Jun
good
Jul
excellent
Aug
excellent
Sep
good
Oct
mixed
Nov
cold
Dec
cold
- Best overall: July and August
- Warmest weather: July and August
- Fewest rainy days: April, May, June and July
- Seasonal pattern: A distinct dry season from February to May, with pleasant summers and very cold winters
- Coldest conditions: February, with freezing nights around -3°C (27°F).
Frequently asked questions about the climate in Mariehamn
What is the best time to visit Mariehamn?
July and August typically offer the most optimal weather in Mariehamn. In contrast, January, February, March, April, November and December tend to have less optimal conditions. Mariehamn has a distinct dry season from February to May, with pleasant summers and very cold winters.
What temperatures can I expect in Mariehamn?
Daytime highs range from 1°C (34°F) in February to 20°C (68°F) in August. Nighttime lows range from -3°C (27°F) to 15°C (59°F). Temperatures vary considerably through the year.
How much rain does Mariehamn get?
Annual rainfall is around 613 mm (24 in). October is the wettest month with 67 mm (2.6 in), while March is the driest with 33 mm (1.3 in).
Mariehamn 3-Day Forecast
Mariehamn on the map
Mariehamn is highlighted - select any city to see its climate.
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