May Weather in Perna, Finland

Last updated: August 23, 2025

In Perna, Finland, the average temperature in May hovers around 11°C (51°F). Expect a range with minimums dipping to -4°C (26°F) and maximums rising to 29°C (84°F). During this month, precipitation accumulates to 48 mm (1.9 in) over approximately 10 days, contributing to an average humidity level of 75%.

May Temperature in Perna

In May in Perna, the average temperature is 11°C (51°F). Maximums can reach 29°C (84°F) and minimums can be as low as -4°C (26°F). This variation makes it essential for travelers to prepare for both warm and cold weather while exploring the area.

May Weather in Perna: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Perna, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Perna, May typically has an average temperature of 11°C (51°F), with highs reaching up to 29°C (84°F) and lows dropping to around -4°C (26°F).

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

May Precipitation in Perna

In Perna in May, the precipitation amount is 48 mm (1.9 in) spread over a period of 10 days.

May Precipitation Trends in Perna

The chart displays monthly precipitation patterns in Perna, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Perna, May typically receives around 48 mm (1.9 inches) of precipitation spread over approximately 10 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

May Humidity in Perna

In Perna in May, humidity is 75%. With an average temperature of 11°C (51°F), this humidity feels like a damp chill that clings to your skin, making outdoor activities less enjoyable and requiring you to dress in layers to stay comfortable during your travels.

May Average Humidity in Perna

This chart illustrates the average monthly humidity levels in Perna, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Perna is approximately 75%, offering insight into how humid the weather typically is during this month.

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

May UV Index in Perna

In Perna in May, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Perna.

Maximum UV Index Levels in Perna for May

The chart shows the monthly maximum UV Index (UVI) for Perna in May, 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 May, the maximum UV index in Perna typically reaches 5, which falls under the moderate exposure category.

Data source: Perna May 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 May Weather in Perna Compares to Other Months

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

This table compares monthly weather conditions in Perna, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-3°C (27°F)	54 mm (2.1 inches)	98%	low
February Weather	-4°C (25°F)	49 mm (1.9 inches)	96%	low
March Weather	-1°C (31°F)	48 mm (1.9 inches)	93%	moderate
April Weather	4°C (40°F)	46 mm (1.8 inches)	87%	moderate
May Weather	11°C (51°F)	48 mm (1.9 inches)	75%	moderate
June Weather	17°C (62°F)	50 mm (2.0 inches)	74%	high
July Weather	18°C (65°F)	67 mm (2.6 inches)	80%	high
August Weather	17°C (62°F)	74 mm (2.9 inches)	85%	moderate
September Weather	12°C (53°F)	60 mm (2.4 inches)	90%	moderate
October Weather	7°C (45°F)	80 mm (3.2 inches)	94%	low
November Weather	3°C (37°F)	58 mm (2.3 inches)	94%	low
December Weather	-1°C (30°F)	75 mm (2.9 inches)	96%	low