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April Weather in Merimasku, Finland

Last updated: August 23, 2025

In Merimasku, Finland, the average temperature in April hovers around 4°C (39°F). Expect chilly days, with a minimum temperature dropping to -11°C (13°F) and occasionally reaching a pleasant maximum of 21°C (70°F). Precipitation is relatively light, averaging 29 mm (1.1 in) over 8 days, while the atmosphere remains quite moist with an average humidity level of 85%.

April Temperature in Merimasku

In April in Merimasku, the average temperature is 4°C (39°F). The maximum can reach 21°C (70°F), and the minimum can be as low as -11°C (13°F). Be prepared for a wide range of temperatures to ensure a comfortable and enjoyable trip.

April Weather in Merimasku: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in Merimasku, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Merimasku, April typically has an average temperature of 4°C (39°F), with highs reaching up to 21°C (70°F) and lows dropping to around -11°C (13°F).
JanFebMarAprMayJunJulAugSepOctNovDec302732394960646255464033
Data source: Temperature data for Merimasku generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

April Precipitation in Merimasku

In Merimasku in April, the precipitation amount is 29 mm (1.1 in) over the course of 8 days.

April Precipitation Trends in Merimasku

The chart displays monthly precipitation patterns in Merimasku, with values for each month alongside April’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April’s conditions compare to those of other months. In Merimasku, April typically receives around 29 mm (1.1 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec474143293840587067875980
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Merimasku

In Merimasku in April, humidity is 85%. With an average temperature of 4°C (39°F), this humidity feels like a damp chill that seeps into your bones, making traveling uncomfortable and requiring extra layers to ward off the cold and moisture.

April Average Humidity in Merimasku

This chart illustrates the average monthly humidity levels in Merimasku, with April’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In April, average humidity in Merimasku is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec92%90%89%85%77%78%78%79%86%90%91%89%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Merimasku

In Merimasku in April, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Merimasku for better planning.

Maximum UV Index Levels in Merimasku for April

The chart shows the monthly maximum UV Index (UVI) for Merimasku in April, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In April, the maximum UV index in Merimasku typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec113457754211
Data source: Merimasku April UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How April Weather in Merimasku Compares to Other Months

Weather in Merimasku varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in Merimasku, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Merimasku, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)47 mm (1.8 inches)92%low
February Weather-3°C (27°F)41 mm (1.6 inches)90%low
March Weather0°C (32°F)43 mm (1.7 inches)89%moderate
April Weather4°C (39°F)29 mm (1.1 inches)85%moderate
May Weather9°C (49°F)38 mm (1.5 inches)77%moderate
June Weather16°C (61°F)40 mm (1.6 inches)78%high
July Weather18°C (65°F)58 mm (2.3 inches)78%high
August Weather17°C (63°F)70 mm (2.7 inches)79%moderate
September Weather13°C (55°F)67 mm (2.6 inches)86%moderate
October Weather8°C (46°F)87 mm (3.4 inches)90%low
November Weather4°C (40°F)59 mm (2.3 inches)91%low
December Weather1°C (33°F)80 mm (3.1 inches)89%low

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