Mariehamn weather

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The weather guide for Mariehamn, Finland shows long term weather averages processed from data supplied by CRU (University of East Anglia) & today's weather forecast provided by MeteoBlue. Find out more about our data sources.

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Which is the hottest month in Mariehamn?

The hottest time of year in Mariehamn is normally July. Expect maximum daytime temperatures to reach 19°C.

Which month has the most rain in Mariehamn?

In terms of rainfall, August is usually the wettest month in Mariehamn with 64mm on average. There are normally 14 days in August with some rain.

When is it sunniest in Mariehamn?

The sunniest time of year in Mariehamn is normally June with bright sunshine on average for 47% of daylight hours; that's 9 hours of sunshine per day.

When is the sea warmest in Mariehamn?

The sea is usually at its warmest in Mariehamn in August when the water temperature reaches 17°C.

Metric (°C / mm)  |  Imperial (°F / inches)

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Compare Mariehamn weather with the USA

Below the Mariehamn weather chart shows average maximum daytime temperature for Mariehamn, Finland and the USA (Washington).

Maximum daytime temperature (°C)

Mariehamn, Finland
USA (Washington)

Metric (°C / mm)  |  Imperial (°F / inches)

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Where's warm in Finland right now?

Below are the temperatures expected today at popular destinations in Finland. Select a destination to compare today's forecast with average weather conditions.

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