SeasonMapMariehamn (Aland) weather in June
Åland Islands
June in Mariehamn: nice, dry, with clean air — one of the best months to visit.
#2 of 12 months in Mariehamn · #664 of 1383 destinations to visit in June · comfort 83/100 (tier A)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Mariehamn in June
Notes from nearby Stockholm (135 km away)
Mariehamn doesn't have its own notes for June yet — these are about Stockholm, close enough to share the season.
Stockholm's forum calls June a favorite for a reason beyond the weather — the city itself opens up, outdoor cafés and bars filling the parks — even though the actual temperature stays mild and rain is a real possibility most days. Regulars' consistent advice: light layers plus a windproof jacket, since a sunny morning can turn cool and breezy by afternoon.
Add your own note from Mariehamn's card on the map.
Mariehamn climate normals — June
| Daytime high | 17°C / 62°F | 😎 nice |
|---|---|---|
| Nighttime low | 13°C / 56°F | |
| Sea temperature | 15°C / 58°F | 🥶 cold sea |
| Rainfall | 23 mm / 0.9 in | ☀️ dry |
| Rainy days | 4 days | |
| Humidity | 77% | 💦 very humid |
| Dew point | 11°C / 51°F | |
| Sunshine | 15.1 h/day | |
| Daylight | 18.8 h | |
| Wind | 20 km/h / 13 mph | |
| Air quality (US AQI) | 39 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Mariehamn in June
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.
Peak crowdsAland Autonomy Day, Midsummer, school holidays in 4 of the markets that fill it(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).
Best weatherMariehamn's weather peaks June–August, best around July.
Best weatherFair weatherToughest weather
What's on in Mariehamn in June
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Opening
Archipelago summer season
15 May – 10 Sep · usuallySummer season opensThe inter-island ferries move to the full timetable, the guest harbours and the Pommern open up, and the cafes on Torggatan put tables outside. Outside this window a lot of it simply is not running. Source ↗
- Holiday
Aland Autonomy Day
9 JunNational holidayClosuresThe islands' own public holiday on 9 June, marked with a ceremony at the parliament in Mariehamn. Offices close here but not on the Finnish mainland, which catches out anyone crossing that day. Source ↗
- Holiday
Midsummer
19–26 Jun · usuallyNational holidayClosuresAland raises its own decorated midsummer poles village by village on the Saturday, a tradition distinct from the Swedish and Finnish versions. Shops shut and the islands turn inward for two days. Source ↗
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 June — FAQ
- Is June a good time to visit Mariehamn?
- June in Mariehamn: nice, dry, with clean air — one of the best months to visit. It ranks #2 of 12 months for Mariehamn on SeasonMap's comfort score (83/100).
- What is the weather like in Mariehamn in June?
- In June, Mariehamn averages a daily high of 16.8°C and a low of 13.2°C, with about 23.4 mm of rain over roughly 4.4 rainy days.
- What is the air quality in Mariehamn in June?
- Mariehamn has a mean US Air Quality Index of about 39 in June.
Other months in Mariehamn
Compare Mariehamn in June
Warmer or cooler than Mariehamn in June
Similar destinations in Northern Europe — June
Within 300 km: Tallinn's Old Town Days on 5–7 Jun, and Stockholm's Archipelago boat season around 15 Jun – 25 Aug.