May Weather in Sumy, Ukraine

Last updated: August 28, 2025

In Sumy, Ukraine, the average temperature in May hovers around 15°C (59°F). Expect minimums dipping to 0°C (33°F) and maximums reaching up to 30°C (86°F). During this month, precipitation averages 64 mm (2.5 in) over 10 days, contributing to an average humidity level of 66%.

May Temperature in Sumy

In May in Sumy, the average temperature is 15°C (59°F), with a maximum that can reach 30°C (86°F) and a minimum that can drop as low as 0°C (33°F). This variation in temperature makes it essential for travelers to pack layers to comfortably adapt to the changing conditions.

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

The chart illustrates May temperature patterns in Sumy, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sumy, May typically has an average temperature of 15°C (59°F), with highs reaching up to 30°C (86°F) and lows dropping to around 0°C (33°F).

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

May Precipitation in Sumy

In Sumy in May, the precipitation amount is 64 mm (2.5 in) over a span of 10 days.

May Precipitation Trends in Sumy

The chart displays monthly precipitation patterns in Sumy, 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 Sumy, May typically receives around 64 mm (2.5 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 Sumy

In Sumy in May humidity is 66%. With an average temperature of 15°C (59°F), this humidity feels like a thick blanket wrapping around you, making traveling somewhat uncomfortable as the warmth can easily sap your energy and leave you longing for refreshing cool breezes.

May Average Humidity in Sumy

This chart illustrates the average monthly humidity levels in Sumy, 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 Sumy is approximately 66%, 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 Sumy

In Sumy in May, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Sumy.

Maximum UV Index Levels in Sumy for May

The chart shows the monthly maximum UV Index (UVI) for Sumy 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 Sumy typically reaches 7, which falls under the high exposure category.

Data source: Sumy 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 Sumy Compares to Other Months

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

This table compares monthly weather conditions in Sumy, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-4°C (25°F)	43 mm (1.7 inches)	92%	low
February Weather	-3°C (26°F)	45 mm (1.8 inches)	93%	low
March Weather	1°C (35°F)	40 mm (1.6 inches)	90%	moderate
April Weather	9°C (48°F)	40 mm (1.6 inches)	79%	moderate
May Weather	15°C (59°F)	64 mm (2.5 inches)	66%	high
June Weather	20°C (68°F)	58 mm (2.3 inches)	65%	very high
July Weather	21°C (69°F)	84 mm (3.3 inches)	55%	very high
August Weather	21°C (69°F)	28 mm (1.1 inches)	49%	high
September Weather	15°C (60°F)	39 mm (1.5 inches)	69%	high
October Weather	9°C (49°F)	36 mm (1.4 inches)	84%	moderate
November Weather	2°C (36°F)	37 mm (1.4 inches)	92%	low
December Weather	-1°C (30°F)	69 mm (2.7 inches)	94%	low