SeasonMapMariehamn (Aland) weather in October
Åland Islands
October in Mariehamn: cool, a little rain, with clean air — a fair time to visit.
#7 of 12 months in Mariehamn · #1260 of 1383 destinations to visit in October · comfort 51/100 (tier D)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Mariehamn in October
No notes yet. Open Mariehamn on the map to add the first one.
Mariehamn climate normals — October
| Daytime high | 10°C / 50°F | 🙂 cool |
|---|---|---|
| Nighttime low | 8°C / 46°F | |
| Sea temperature | 10°C / 49°F | 🥶 cold sea |
| Rainfall | 62 mm / 2.5 in | 🌦 some rain |
| Rainy days | 13 days | |
| Humidity | 78% | 💦 very humid |
| Dew point | 5°C / 41°F | |
| Sunshine | 4.8 h/day | |
| Daylight | 10.1 h | |
| Wind | 27 km/h / 17 mph | |
| Air quality (US AQI) | 31 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Mariehamn in October
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Shoulder seasonschool holidays in 4 of the markets that fill it, an ordinary month(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Mariehamn's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherMariehamn's weather peaks June–August, best around July.
Best weatherFair weatherToughest weather
Nearby, and something's on
Within 300 km of Mariehamn — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Mariehamn?
Mariehamn in October — FAQ
- Is October a good time to visit Mariehamn?
- October in Mariehamn: cool, a little rain, with clean air — a fair time to visit. It ranks #7 of 12 months for Mariehamn on SeasonMap's comfort score (51/100).
- What is the weather like in Mariehamn in October?
- In October, Mariehamn averages a daily high of 10.1°C and a low of 7.9°C, with about 62.4 mm of rain over roughly 12.6 rainy days.
- What is the air quality in Mariehamn in October?
- Mariehamn has a mean US Air Quality Index of about 31 in October.
Other months in Mariehamn
Compare Mariehamn in October
Warmer or cooler than Mariehamn in October
Similar destinations in Northern Europe — October
Within 300 km: Helsinki's Ruska, the autumn colour around 5 Sep – 10 Oct.