April Weather in Heinola, Finland

Last updated: August 23, 2025

In April, the average temperature in Heinola, Finland hovers around 3°C (38°F). Expect chilly days where the temperature can dip as low as -11°C (12°F), while occasionally reaching a maximum of 19°C (66°F). With 47 mm (1.8 in) of precipitation spread over about 12 days, you may want to keep an umbrella handy. Additionally, humidity levels are notably high, averaging 87%.

April Temperature in Heinola

In April in Heinola, the average temperature is 3°C (38°F). Maximum temperatures can reach up to 19°C (66°F), while the minimum can drop as low as -11°C (12°F). Travelers should be prepared for a wide range of weather conditions, making it essential to dress in layers.

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

The chart illustrates April temperature patterns in Heinola, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Heinola, April typically has an average temperature of 3°C (38°F), with highs reaching up to 19°C (66°F) and lows dropping to around -11°C (12°F).

Data source: Temperature data for Heinola generated using information from the Copernicus Climate Change Service.

April Precipitation in Heinola

In Heinola in April, the precipitation amount is 47 mm (1.8 in) over a period of 12 days.

April Precipitation Trends in Heinola

The chart displays monthly precipitation patterns in Heinola, 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 Heinola, April typically receives around 47 mm (1.8 inches) of precipitation spread over approximately 12 days.

Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

April Humidity in Heinola

In Heinola in April humidity is 87%. With an average temperature of 3°C (38°F), this humidity feels like a chilly blanket wrapped around you, making travel quite uncomfortable as the cold dampness seeps into your clothes and lingers in the air, often leaving you shivering and longing for warmer, drier conditions.

April Average Humidity in Heinola

This chart illustrates the average monthly humidity levels in Heinola, 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 Heinola is approximately 87%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Heinola

In Heinola 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 Heinola for better planning.

Maximum UV Index Levels in Heinola for April

The chart shows the monthly maximum UV Index (UVI) for Heinola 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 Heinola typically reaches 4, which falls under the moderate exposure category.

Data source: Heinola 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 Heinola Compares to Other Months

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

This table compares monthly weather conditions in Heinola, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-4°C (25°F)	47 mm (1.9 inches)	98%	low
February Weather	-5°C (23°F)	44 mm (1.7 inches)	96%	low
March Weather	-2°C (29°F)	43 mm (1.7 inches)	93%	moderate
April Weather	3°C (38°F)	47 mm (1.8 inches)	87%	moderate
May Weather	9°C (49°F)	56 mm (2.2 inches)	75%	moderate
June Weather	15°C (60°F)	62 mm (2.5 inches)	74%	high
July Weather	17°C (63°F)	80 mm (3.1 inches)	80%	high
August Weather	16°C (61°F)	87 mm (3.4 inches)	85%	moderate
September Weather	11°C (52°F)	64 mm (2.5 inches)	90%	moderate
October Weather	6°C (43°F)	77 mm (3.0 inches)	94%	low
November Weather	2°C (36°F)	54 mm (2.1 inches)	94%	low
December Weather	-2°C (28°F)	69 mm (2.7 inches)	96%	low