May Weather in Sliven, Bulgaria

Last updated: August 22, 2025

In May, the average temperature in Sliven, Bulgaria hovers around 15°C (60°F). Expect lows of 3°C (37°F) and highs reaching up to 29°C (85°F). This month also brings a precipitation total of 91 mm (3.6 in) spread over 13 days, contributing to an average humidity of 72%.

May Temperature in Sliven

In May in Sliven, the average temperature is 15°C (60°F). Maximums can reach 29°C (85°F) and minimums can be as low as 3°C (37°F). This climate offers a pleasant range for travelers, making it an ideal time to explore Sliven.

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

The chart illustrates May temperature patterns in Sliven, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sliven, May typically has an average temperature of 15°C (60°F), with highs reaching up to 29°C (85°F) and lows dropping to around 3°C (37°F).

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

May Precipitation in Sliven

In Sliven in May, the precipitation amount is 91 mm (3.6 in) spread over 13 days.

May Precipitation Trends in Sliven

The chart displays monthly precipitation patterns in Sliven, 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 Sliven, May typically receives around 91 mm (3.6 inches) of precipitation spread over approximately 13 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 Sliven

In Sliven in May humidity is 72%. With an average temperature of 15°C (60°F), this humidity feels like a warm embrace, creating a slightly muggy atmosphere that can make strolling around a bit sticky. Travelers might find themselves longing for a refreshing breeze, and it’s advisable to stay hydrated while exploring local sights.

May Average Humidity in Sliven

This chart illustrates the average monthly humidity levels in Sliven, 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 Sliven is approximately 72%, 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 Sliven

In Sliven in May, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Sliven.

Maximum UV Index Levels in Sliven for May

The chart shows the monthly maximum UV Index (UVI) for Sliven 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 Sliven typically reaches 9, which falls under the very high exposure category.

Data source: Sliven 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 Sliven Compares to Other Months

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

This table compares monthly weather conditions in Sliven, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	0°C (33°F)	54 mm (2.1 inches)	88%	low
February Weather	3°C (38°F)	55 mm (2.2 inches)	84%	moderate
March Weather	5°C (42°F)	75 mm (2.9 inches)	81%	high
April Weather	10°C (50°F)	58 mm (2.3 inches)	70%	very high
May Weather	15°C (60°F)	91 mm (3.6 inches)	72%	very high
June Weather	19°C (67°F)	150 mm (5.9 inches)	66%	very high
July Weather	22°C (72°F)	82 mm (3.2 inches)	62%	very high
August Weather	23°C (73°F)	36 mm (1.4 inches)	48%	very high
September Weather	18°C (65°F)	29 mm (1.2 inches)	58%	high
October Weather	13°C (55°F)	70 mm (2.7 inches)	78%	high
November Weather	8°C (46°F)	59 mm (2.3 inches)	85%	moderate
December Weather	3°C (38°F)	89 mm (3.5 inches)	87%	low