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April Weather in Alastaro, Finland

Last updated: August 23, 2025

In April, the average temperature in Alastaro, Finland hovers around 4°C (39°F). Expect chilly conditions with a minimum temperature dropping to -13°C (10°F) and highs reaching up to 21°C (70°F). Precipitation is moderate, with about 38 mm (1.5 in) spread over 10 days, contributing to an average humidity of a notable 86%.

April Temperature in Alastaro

In April in Alastaro, the average temperature is 4°C (39°F), with maximums reaching up to 21°C (70°F) and minimums dropping as low as -13°C (10°F). Visitors should be prepared for a wide range of temperatures, making it essential to pack accordingly for both warmth and comfort.

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

The chart illustrates April temperature patterns in Alastaro, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Alastaro, 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 -13°C (10°F).
JanFebMarAprMayJunJulAugSepOctNovDec272531395061636152433730
Data source: Temperature data for Alastaro 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 Alastaro

In Alastaro in April, the precipitation amount is 38 mm (1.5 in) over the course of 10 days.

April Precipitation Trends in Alastaro

The chart displays monthly precipitation patterns in Alastaro, 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 Alastaro, April typically receives around 38 mm (1.5 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec464243385057838359755464
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Alastaro

In Alastaro in April humidity is 86%. With an average temperature of 4°C (39°F), this humidity feels like a chilly mist enveloping you, making it essential to bundle up while exploring, as each breath comes with a damp chill that can be quite refreshing yet starkly invigorating for travelers.

April Average Humidity in Alastaro

This chart illustrates the average monthly humidity levels in Alastaro, 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 Alastaro is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec97%95%93%87%75%75%80%83%90%93%94%95%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Alastaro

In Alastaro 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 Alastaro for better planning.

Maximum UV Index Levels in Alastaro for April

The chart shows the monthly maximum UV Index (UVI) for Alastaro 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 Alastaro typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec113456653211
Data source: Alastaro 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 Alastaro Compares to Other Months

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

This table compares monthly weather conditions in Alastaro, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)46 mm (1.8 inches)97%low
February Weather-4°C (25°F)42 mm (1.6 inches)95%low
March Weather-1°C (31°F)43 mm (1.7 inches)93%moderate
April Weather4°C (39°F)38 mm (1.5 inches)86%moderate
May Weather10°C (50°F)50 mm (2.0 inches)75%moderate
June Weather16°C (61°F)57 mm (2.2 inches)75%high
July Weather17°C (64°F)83 mm (3.3 inches)80%high
August Weather16°C (61°F)83 mm (3.3 inches)83%moderate
September Weather11°C (53°F)59 mm (2.3 inches)90%moderate
October Weather6°C (44°F)75 mm (3.0 inches)93%low
November Weather3°C (37°F)54 mm (2.1 inches)94%low
December Weather-1°C (30°F)64 mm (2.5 inches)95%low

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