May Weather in Kotka, Finland

Last updated: August 23, 2025

In May, the average temperature in Kotka, Finland hovers around 10°C (50°F). Expect a minimum chill of -3°C (27°F) and a pleasant maximum of 25°C (77°F). With an average precipitation of 48 mm (1.9 in) spread over 9 days, and a relative humidity of 75%, you'll want to prepare for a mix of weather while enjoying the season's unique charm!

May Temperature in Kotka

In May in Kotka, the average temperature is 10°C (50°F). Maximums can reach 25°C (77°F), while minimums can drop as low as -3°C (27°F). Be prepared for a range of temperatures, making it ideal for layering your clothing during your travels.

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

The chart illustrates May temperature patterns in Kotka, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Kotka, May typically has an average temperature of 10°C (50°F), with highs reaching up to 25°C (77°F) and lows dropping to around -3°C (27°F).

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

May Precipitation in Kotka

In Kotka in May, the total precipitation amount is 48 mm (1.9 in) spread over 9 days.

May Precipitation Trends in Kotka

The chart displays monthly precipitation patterns in Kotka, 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 Kotka, May typically receives around 48 mm (1.9 inches) of precipitation spread over approximately 9 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 Kotka

In Kotka 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 Kotka

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

In Kotka 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 Kotka.

Maximum UV Index Levels in Kotka for May

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

Data source: Kotka 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 Kotka Compares to Other Months

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

This table compares monthly weather conditions in Kotka, 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)	55 mm (2.2 inches)	98%	low
February Weather	-4°C (25°F)	55 mm (2.2 inches)	96%	low
March Weather	-1°C (30°F)	49 mm (1.9 inches)	93%	moderate
April Weather	4°C (39°F)	43 mm (1.7 inches)	87%	moderate
May Weather	10°C (50°F)	48 mm (1.9 inches)	75%	moderate
June Weather	16°C (61°F)	48 mm (1.9 inches)	74%	high
July Weather	18°C (64°F)	75 mm (3.0 inches)	80%	high
August Weather	17°C (62°F)	88 mm (3.5 inches)	85%	moderate
September Weather	12°C (54°F)	66 mm (2.6 inches)	90%	moderate
October Weather	7°C (45°F)	86 mm (3.4 inches)	94%	low
November Weather	3°C (38°F)	66 mm (2.6 inches)	94%	low
December Weather	-1°C (30°F)	81 mm (3.2 inches)	96%	low