May Weather in Siuntio, Finland

Last updated: August 23, 2025

In May, the average temperature in Siuntio, Finland is a cool 10°C (50°F). Expect temperatures to range from a chilly -3°C (27°F) at minimum to a pleasant 26°C (79°F) at maximum. During this month, rainfall can reach 53 mm (2.1 in) spread over 11 days, contributing to an average humidity of 75%. Embrace the variety of weather as you explore!

May Temperature in Siuntio

In May in Siuntio, the average temperature is 10°C (50°F), with maximums reaching up to 26°C (79°F) and minimums plummeting as low as -3°C (27°F). This varied climate means travelers should be prepared for both warm days and chilly nights.

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

The chart illustrates May temperature patterns in Siuntio, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Siuntio, May typically has an average temperature of 10°C (50°F), with highs reaching up to 26°C (79°F) and lows dropping to around -3°C (27°F).

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

May Precipitation in Siuntio

In Siuntio in May, the precipitation amount is 53 mm (2.1 in) over the course of 11 days.

May Precipitation Trends in Siuntio

The chart displays monthly precipitation patterns in Siuntio, 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 Siuntio, May typically receives around 53 mm (2.1 inches) of precipitation spread over approximately 11 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 Siuntio

In Siuntio 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 Siuntio

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

In Siuntio 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 Siuntio.

Maximum UV Index Levels in Siuntio for May

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

Data source: Siuntio 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 Siuntio Compares to Other Months

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

This table compares monthly weather conditions in Siuntio, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-2°C (28°F)	58 mm (2.3 inches)	97%	low
February Weather	-3°C (26°F)	49 mm (1.9 inches)	95%	low
March Weather	-1°C (31°F)	54 mm (2.1 inches)	93%	moderate
April Weather	3°C (39°F)	40 mm (1.6 inches)	86%	moderate
May Weather	10°C (50°F)	53 mm (2.1 inches)	75%	moderate
June Weather	16°C (61°F)	51 mm (2.0 inches)	75%	high
July Weather	18°C (64°F)	83 mm (3.3 inches)	80%	high
August Weather	16°C (62°F)	78 mm (3.1 inches)	83%	moderate
September Weather	12°C (54°F)	65 mm (2.6 inches)	90%	moderate
October Weather	7°C (45°F)	88 mm (3.5 inches)	93%	low
November Weather	3°C (38°F)	63 mm (2.5 inches)	94%	low
December Weather	-1°C (31°F)	75 mm (2.9 inches)	95%	low