Mariehamn weather in April 2025

Expect 6°C daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in Mariehamn in April. Check more long-term weather averages for Mariehamn in April before you book your next holiday to Finland in 2025/2026.

  • 6°C maximum daytime temperature in April in Mariehamn6
    6°C max day temperature
  • 5 hours of sunshine per day
  • 11 days with some rainfall in April in Mariehamn11
    11 days with some rainfall
  • -1°C minimum night-time temperature in April in Mariehamn-1
    -1°C min night temperature
  • 15 hours of daylight per day in April in Mariehamn15
    15 hours of daylight per day
  • No heat & humidity in April in Mariehamn0
    No heat & humidity
  • 29 mm monthly rainfall in April in Mariehamn29
    29 mm of monthly rainfall
  • UV (maximum) index 3 (Moderate) in April in Mariehamn3
    3 (Moderate) UV index
  • 1°C sea temperature in April in Mariehamn1
    1°C sea temperature

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The April 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)

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How cold is it in Mariehamn in April?

Daytime temperatures usually reach 6°C in Mariehamn in April, falling to -1°C at night.

How sunny is it in Mariehamn in April?

There are normally 5 hours of bright sunshine each day in Mariehamn in April - that's 34% of daylight hours.

Is the sea cold around Mariehamn in April?

The average sea temperature around Mariehamn in April is 1°C.

Does it rain in Mariehamn in April?

There are usually 11 days with some rain in Mariehamn in April and the average monthly rainfall is 29mm.

Mariehamn April sunrise & sunset times

Browse the sunrise and sunset times for Mariehamn in April 2025. Select a month to view Mariehamn sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Tuesday, 1st April 2025 06:05 19:25
Tuesday, 15th April 2025 05:23 19:59
Wednesday, 30th April 2025 04:40 20:37

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