May Weather in Marttila, Finland

Last updated: August 23, 2025

In May, the average temperature in Marttila, Finland hovers around 10°C (50°F). Expect a chill with minimums dropping to -5°C (24°F), while highs can reach a warm 27°C (81°F). During this time, you can anticipate 55 mm (2.2 in) of precipitation over approximately 10 days, contributing to an average humidity of 75%.

May Temperature in Marttila

In May in Marttila, the average temperature is 10°C (50°F). Maximums can reach 27°C (81°F), and minimums can be as low as -5°C (24°F). Travelers should be prepared for a range of temperatures and pack accordingly for both warm and cold conditions.

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

The chart illustrates May temperature patterns in Marttila, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Marttila, May typically has an average temperature of 10°C (50°F), with highs reaching up to 27°C (81°F) and lows dropping to around -5°C (24°F).

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

May Precipitation in Marttila

In Marttila in May, the precipitation amount is 55 mm (2.2 in) spread over a duration of 10 days.

May Precipitation Trends in Marttila

The chart displays monthly precipitation patterns in Marttila, 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 Marttila, May typically receives around 55 mm (2.2 inches) of precipitation spread over approximately 10 days.

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

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Millimeters (mm) Inches (in)

May Humidity in Marttila

In Marttila in May humidity is 75%. With an average temperature of 10°C (50°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration uncomfortable and necessitating extra layers for warmth and comfort.

May Average Humidity in Marttila

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

In Marttila 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 Marttila.

Maximum UV Index Levels in Marttila for May

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

Data source: Marttila 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 Marttila Compares to Other Months

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

This table compares monthly weather conditions in Marttila, 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 (28°F)	50 mm (2.0 inches)	97%	low
February Weather	-4°C (25°F)	44 mm (1.7 inches)	95%	low
March Weather	-1°C (31°F)	47 mm (1.9 inches)	93%	moderate
April Weather	4°C (39°F)	38 mm (1.5 inches)	86%	moderate
May Weather	10°C (50°F)	55 mm (2.2 inches)	75%	moderate
June Weather	16°C (62°F)	51 mm (2.0 inches)	75%	high
July Weather	18°C (64°F)	78 mm (3.1 inches)	80%	high
August Weather	16°C (61°F)	89 mm (3.5 inches)	83%	moderate
September Weather	12°C (53°F)	58 mm (2.3 inches)	90%	moderate
October Weather	7°C (44°F)	76 mm (3.0 inches)	93%	low
November Weather	3°C (38°F)	53 mm (2.1 inches)	94%	low
December Weather	-1°C (30°F)	69 mm (2.7 inches)	95%	low