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Mariehamn weather in May 2025
Expect 12°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Mariehamn in May. Check more long-term weather averages for Mariehamn in May before you book your next holiday to Finland in 2025/2026.
- 1212°C max day temperature
- 8 hours of sunshine per day
- 1010 days with some rainfall
- 44°C min night temperature
- 1717 hours of daylight per day
- 0No heat & humidity
- 2727 mm of monthly rainfall
- 44 (Moderate) UV index
- 55°C sea temperature
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Recommended for Finland
The May weather guide for Finland (Mariehamn) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Metric (°C / mm) | Imperial (°F / inches)
How warm is it in Mariehamn in May?
Daytime temperatures usually reach 12°C in Mariehamn in May, falling to 4°C at night.
How sunny is it in Mariehamn in May?
There are normally 8 hours of bright sunshine each day in Mariehamn in May - that's 45% of daylight hours.
Is the sea cold around Mariehamn in May?
The average sea temperature around Mariehamn in May is 5°C.
Does it rain in Mariehamn in May?
There are usually 10 days with some rain in Mariehamn in May and the average monthly rainfall is 27mm.
Mariehamn May sunrise & sunset times
Browse the sunrise and sunset times for Mariehamn in May 2025. Select a month to view Mariehamn sunrise and sunset times for the next 12 months.
JanFebMarAprMayJunJulAugSepOctNovDec
Date | Sunrise times | Sunset times |
---|---|---|
Thursday, 1st May 2025 | 04:37 | 20:39 |
Friday, 16th May 2025 | 03:59 | 21:16 |
Saturday, 31st May 2025 | 03:30 | 21:47 |
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