Aland Islands climate
World Climates covers 1 place in Aland Islands. Mariehamn has a warm-summer humid continental climate (Köppen Dfb).
Climate of Mariehamn at a glance
The year average in Mariehamn is 7 °C45 °F. The warmest month is August, with an average high of 18 °C65 °F. The coldest is February, with an average low of −2 °C28 °F. About 649 mm26 in of precipitation falls in a year. October is the wettest month and April the driest. By our comfort score, the best months to visit are July and August.
Frequently asked questions
How many places in Aland Islands does this site cover?
World Climates has climate data for one place in Aland Islands: Mariehamn. Its page has monthly averages for temperature, rainfall, humidity and daylight.
What is the warmest month in Mariehamn?
August is the warmest month, with an average high of 18 °C65 °F. February is the coldest, with an average low of −2 °C28 °F.
When does it rain the most in Mariehamn?
October is the wettest month, with about 70 mm2.8 in of precipitation. The yearly total is about 649 mm26 in.
When is the best time to visit Mariehamn?
By our comfort score, the most comfortable months are July and August. The score is based on long-term averages, not on a forecast.
Climate of every place in Aland Islands
| Place | Year | Max high | Min low | Precip. |
|---|---|---|---|---|
| Mariehamn | 7 | 18 | −2 | 649 |
Year = annual mean temperature; max high = average high of the warmest month; min low = average low of the coldest month; precip. = annual total. Temperatures in °C°F, precipitation in mminches. Sorted by population.
Data: NASA POWER climatology 2001–2025 (MERRA-2 reanalysis, CERES satellite data) — grid-cell averages, not station records. Sources and method.