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April Weather in Janakkala, Finland

Last updated: August 23, 2025

In April, the average temperature in Janakkala, Finland hovers around 3°C (38°F). Expect a chilly minimum of -13°C (9°F) and the occasional warmth with highs reaching 21°C (70°F). Be prepared for 46 mm (1.8 in) of precipitation spread over 12 days, and with an average humidity of 86%, it’s advisable to stay cozy and dry!

April Temperature in Janakkala

In April in Janakkala, the average temperature is 3°C (38°F), with maximums reaching 21°C (70°F) and minimums dropping as low as -13°C (9°F). It's advisable to pack layers and be prepared for fluctuating temperatures while traveling during this time.

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

The chart illustrates April temperature patterns in Janakkala, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Janakkala, April typically has an average temperature of 3°C (38°F), with highs reaching up to 21°C (70°F) and lows dropping to around -13°C (9°F).
JanFebMarAprMayJunJulAugSepOctNovDec252429385061636052433628
Data source: Temperature data for Janakkala 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 Janakkala

In Janakkala in April, the total precipitation amount is 46 mm (1.8 in) spread over the course of 12 days.

April Precipitation Trends in Janakkala

The chart displays monthly precipitation patterns in Janakkala, 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 Janakkala, April typically receives around 46 mm (1.8 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec484143466071858065755263
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Janakkala

In Janakkala in April humidity is 86%. With an average temperature of 3°C (38°F), this humidity feels like a damp chill that seeps through your layers, making traveling uncomfortable as breath clouds visibly in the crisp air.

April Average Humidity in Janakkala

This chart illustrates the average monthly humidity levels in Janakkala, 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 Janakkala 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 Janakkala

In Janakkala 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 Janakkala for better planning.

Maximum UV Index Levels in Janakkala for April

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

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

This table compares monthly weather conditions in Janakkala, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (25°F)48 mm (1.9 inches)97%low
February Weather-5°C (24°F)41 mm (1.6 inches)95%low
March Weather-2°C (29°F)43 mm (1.7 inches)93%moderate
April Weather3°C (38°F)46 mm (1.8 inches)86%moderate
May Weather10°C (50°F)60 mm (2.4 inches)75%moderate
June Weather16°C (61°F)71 mm (2.8 inches)75%high
July Weather17°C (63°F)85 mm (3.4 inches)80%high
August Weather16°C (61°F)80 mm (3.2 inches)83%moderate
September Weather11°C (52°F)65 mm (2.6 inches)90%moderate
October Weather6°C (43°F)75 mm (2.9 inches)93%low
November Weather2°C (36°F)52 mm (2.1 inches)94%low
December Weather-2°C (29°F)63 mm (2.5 inches)95%low

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