Weather in Mariehamn in April 2025
Average weather
Average temperature in Mariehamn in April
Going from a maximum of +9°C during the day to a minimum of -3°C during the night, the temperature in April averages around +5°C.
The average maximum temperature goes up 42% by the end of the month, compared with the beginning of the month, from +1°C to +6°C.
Is Mariehamn warm or cold in April?
Mariehamn is typically cool in April.
Maximum temperatures go up compared to the previous month from +1°C to +5°C. The minimum temperature also goes up from -3°C to +1°C.
Pack a sweater and a jacket as there will be cooler temperatures.
Take a look at how April is compared to other months in Mariehamn:
Climate in Mariehamn in April
| March | April | May | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +1°C | +5°C | +10°C | ||||
| Min. temperature | ||||||
| -18°C | -8°C | -5°C | ||||
| Max. temperature | ||||||
| +15°C | +15°C | +21°C | ||||
| Rainfall | ||||||
| 7 mm | 21 mm | 31 mm | ||||
| Wind | ||||||
| 6 m/s | 5 m/s | 4 m/s | ||||
| Humidity | ||||||
| 84% | 84% | 84% | ||||
| Air pressure | ||||||
| 1011 HPa | 1013 HPa | 1014 HPa | ||||
| Sunny days | ||||||
| 5 | 7 | 10 | ||||
| Cloudy days | ||||||
| 14 | 11 | 11 | ||||
| Rainy days | ||||||
| 3 | 7 | 10 | ||||
| Snowy days | ||||||
| 10 | 4 | 0 | ||||
April weather is still as ok as in March. It’s getting warmer as April arrives. The average maximum temperature goes up from +1°C to +5°C during the day. Prepare for more rain. Average rainfall goes from 7 mm to 21 mm. Humidity levels don’t change as the month goes on, averaging around 84%. Winds are calmer in comparison to March, going down from 6 m/s to 5 m/s on average. The good news is there are likely to be more sunny days in April, from 5 to 7.
May brings much the same weather, it remains ok.
Wind
The average wind speed is 4 m/s getting up to 9 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Mariehamn is gradually decreasing during April, going from 5 m/s to 4 m/s over the course of the month.
Rain
Snow
Here’s how April is compared with other months in the amount of snow, total mm:
How was the weather last April in Mariehamn?
Climate Change over Years
The climate in Mariehamn in April has not changed much over the last 43 years.
The average temperature was the lowest in 1987 (+5°C) and the highest in 2020 (+11°C). The driest year was 2018 with only 269 mm of rainfall, and the wettest year was 2020 with 612 mm.
FAQ
Is April a good time to visit Mariehamn?
Can you sunbathe in Mariehamn in April?
Is Mariehamn rainy in April?
Is it sunny in Mariehamn in April?
Monthly weather in Mariehamn
Source of the data
For this page, we’ve looked at the typical weather in Mariehamn, based on historical hourly weather data from January 1, 1979, to December 31, 2022.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.