Mariehamn weather in July
Temperature, sea and sunshine in July: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in July
Excellent
Best time to visit: June – August
What is the weather like in Mariehamn in July?
In July, Mariehamn is mild: daytime highs average 19 °C, and nights cool down to about 15 °C. The sea averages 15.9 °C – swimming is only for the hardy. With around 10 hours of sunshine a day, there is plenty of sun. Rain is frequent, with about 9 rainy days and 53 mm in total. All in all, July is an excellent month for a holiday in Mariehamn.
July compared
How the weather changes from June to August. Tap a month to open it.
More details for July
- Daylight
- 18 h 10 min04:41 – 22:51
- UV index
- 5 · moderateclear sky, noon (estimate)All months
- Muggy days
- 1 daydew point 18 °C or moreAll months
- Wind
- 21 km/haverage daily peakAll months
- Cloud cover
- 53 %on averageAll months
- Hot days
- 0 days30 °C or more
- Snow days
- 0 days1 cm or more of fresh snowAll months
- Time zone
- UTC+3Europe/Mariehamn
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %100 %
- Few rainy daysweight 30 %64 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in July
- Sunscreen
- Sunglasses & sun hat
- A jumper for the evenings
- Rain jacket or umbrella
Mariehamn in July: quick answers
Is Mariehamn hot in July?
No. In July, Mariehamn is mild: daytime highs average 19 °C and nights drop to about 15 °C.
Can you swim in Mariehamn in July?
Only if you don't mind cold water: in July the sea averages just 15.9 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in Mariehamn in July?
Rain is frequent, with about 9 rainy days and 53 mm in total.
Mariehamn month by month
The whole year in MariehamnAll destinations: Åland IslandsWhere to go in JulySea temperature in July
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences