May Weather in Sumiainen, Finland

Last updated: August 23, 2025

In May, the average temperature in Sumiainen, Finland hovers around 8°C (48°F). Expect a minimum chill of -3°C (26°F) and the possibility of warmth reaching up to 28°C (83°F). With 60 mm (2.4 in) of precipitation spread over 11 days, make sure to prepare for wet weather. The atmosphere tends to be quite humid, with an average humidity of 78%.

May Temperature in Sumiainen

In May in Sumiainen, the average temperature is 8°C (48°F). Maximum temperatures can reach 28°C (83°F), while the minimum can drop as low as -3°C (26°F). This diverse range of temperatures makes Sumiainen an intriguing destination for travelers, offering both mild days and chilly nights.

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

The chart illustrates May temperature patterns in Sumiainen, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sumiainen, May typically has an average temperature of 8°C (48°F), with highs reaching up to 28°C (83°F) and lows dropping to around -3°C (26°F).

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

May Precipitation in Sumiainen

In Sumiainen in May, the precipitation amount is 60 mm (2.4 in) over the course of 11 days.

May Precipitation Trends in Sumiainen

The chart displays monthly precipitation patterns in Sumiainen, 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 Sumiainen, May typically receives around 60 mm (2.4 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 Sumiainen

In Sumiainen in May, humidity is 78%. With an average temperature of 8°C (48°F), this humidity feels like a chilly dampness that clings to your clothes, making your travels feel heavier and less invigorating as you explore the sights.

May Average Humidity in Sumiainen

This chart illustrates the average monthly humidity levels in Sumiainen, 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 Sumiainen is approximately 78%, 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 Sumiainen

In Sumiainen 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 Sumiainen.

Maximum UV Index Levels in Sumiainen for May

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

Data source: Sumiainen 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 Sumiainen Compares to Other Months

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

This table compares monthly weather conditions in Sumiainen, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-6°C (22°F)	45 mm (1.8 inches)	99%	low
February Weather	-6°C (21°F)	41 mm (1.6 inches)	97%	low
March Weather	-3°C (27°F)	38 mm (1.5 inches)	95%	moderate
April Weather	2°C (35°F)	43 mm (1.7 inches)	87%	moderate
May Weather	8°C (48°F)	60 mm (2.4 inches)	78%	moderate
June Weather	15°C (60°F)	57 mm (2.3 inches)	74%	high
July Weather	17°C (63°F)	71 mm (2.8 inches)	80%	high
August Weather	15°C (60°F)	89 mm (3.5 inches)	85%	moderate
September Weather	10°C (50°F)	80 mm (3.2 inches)	91%	moderate
October Weather	5°C (41°F)	80 mm (3.1 inches)	95%	low
November Weather	1°C (34°F)	62 mm (2.4 inches)	94%	low
December Weather	-3°C (26°F)	62 mm (2.4 inches)	98%	low