SeasonMapMariehamn (Aland) weather in December
Åland Islands
December in Mariehamn: cold, a little rain, with clean air — one of the weakest months to visit.
#12 of 12 months in Mariehamn · #1359 of 1383 destinations to visit in December · comfort 24/100 (tier F)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Mariehamn in December
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Mariehamn climate normals — December
| Daytime high | 3°C / 37°F | 🧥 cold |
|---|---|---|
| Nighttime low | 0°C / 32°F | |
| Sea temperature | 2°C / 36°F | 🥶 cold sea |
| Rainfall | 51 mm / 2 in | 🌦 some rain |
| Rainy days | 13 days | |
| Humidity | 82% | 💦 very humid |
| Dew point | -3°C / 27°F | |
| Sunshine | 0.8 h/day | |
| Daylight | 6 h | |
| Wind | 26 km/h / 16 mph | |
| Snowfall | 11.7 cm / 4.6 in | |
| Air quality (US AQI) | 29 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Mariehamn in December
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.
Quietschool holidays in 7 of the markets that fill it, one of its worst months for weather(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).
Toughest weatherMariehamn's weather peaks June–August, best around July.
Best weatherFair weatherToughest weather
What's on in Mariehamn in December
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
Winter on the islands
1 Nov – 15 Apr · usuallyOff-season shutdownClosuresMost of the guest harbours, museums and summer restaurants close and the small archipelago routes drop to a skeleton timetable. The big Stockholm and Turku ferries still call, so getting here is never the problem.
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.
- Stockholm135 kmChristmas markets and Lucia22 Nov – 23 Dec · usuallyChristmas & New Yearvisitstockholm.com
- Helsinki277 kmSt Thomas's Christmas Market28 Nov – 22 Dec · usuallyChristmas & New Yeartuomaanmarkkinat.fi
- Tallinn280 kmChristmas market on Town Hall Square20 Nov – 6 JanChristmas & New Yearvisittallinn.ee
Where is Mariehamn?
Mariehamn in December — FAQ
- Is December a good time to visit Mariehamn?
- December in Mariehamn: cold, a little rain, with clean air — one of the weakest months to visit. It ranks #12 of 12 months for Mariehamn on SeasonMap's comfort score (24/100).
- What is the weather like in Mariehamn in December?
- In December, Mariehamn averages a daily high of 2.5°C and a low of 0.2°C, with about 50.7 mm of rain over roughly 12.8 rainy days.
- What is the air quality in Mariehamn in December?
- Mariehamn has a mean US Air Quality Index of about 29 in December.
- Does it snow in Mariehamn in December?
- Mariehamn sees roughly 11.7 cm of snowfall in December.
Other months in Mariehamn
Compare Mariehamn in December
Warmer or cooler than Mariehamn in December
Similar destinations in Northern Europe — December
Within 300 km: Stockholm's Christmas markets and Lucia around 22 Nov – 23 Dec, and Helsinki's St Thomas's Christmas Market around 28 Nov – 22 Dec.