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August Weather in Sliven, Bulgaria

Last updated: August 22, 2025

In August, the average temperature in Sliven, Bulgaria hovers around 23°C (73°F). However, you can expect a range, with minimums dipping to 11°C (52°F) and maximums soaring to 37°C (99°F). During this time, anticipate an average precipitation of 36 mm (1.4 in) spread over 7 days, accompanied by a comfortable average humidity of 48%.

August Temperature in Sliven

In August in Sliven, the average temperature is 23°C (73°F). Maximum temperatures can reach 37°C (99°F), while minimums can drop to as low as 11°C (52°F). This pleasant range makes Sliven an ideal destination for travelers seeking a comfortable climate.

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

The chart illustrates August 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, August typically has an average temperature of 23°C (73°F), with highs reaching up to 37°C (99°F) and lows dropping to around 11°C (52°F).
JanFebMarAprMayJunJulAugSepOctNovDec333842506067717365554638
Data source: Temperature data for Sliven generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

August Precipitation in Sliven

In Sliven in August, the total precipitation amount is 36 mm (1.4 in) over a span of 7 days.

August Precipitation Trends in Sliven

The chart displays monthly precipitation patterns in Sliven, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Sliven, August typically receives around 36 mm (1.4 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec5456755891150823629705989
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Sliven

In Sliven in August humidity is 48%. With an average temperature of 23°C (73°F), this humidity feels like a pleasant embrace, making it comfortable for traveling while allowing you to enjoy outdoor activities without feeling overly sticky or weighed down.

August Average Humidity in Sliven

This chart illustrates the average monthly humidity levels in Sliven, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Sliven is approximately 48%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%84%81%70%72%66%62%48%58%78%85%87%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Sliven

In Sliven in August, 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 August

The chart shows the monthly maximum UV Index (UVI) for Sliven in August, 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 August, the maximum UV index in Sliven typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2468910997632
Data source: Sliven August 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 August 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 August’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 August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (33°F)54 mm (2.1 inches)88%low
February Weather3°C (38°F)55 mm (2.2 inches)84%moderate
March Weather5°C (42°F)75 mm (2.9 inches)81%high
April Weather10°C (50°F)58 mm (2.3 inches)70%very high
May Weather15°C (60°F)91 mm (3.6 inches)72%very high
June Weather19°C (67°F)150 mm (5.9 inches)66%very high
July Weather22°C (72°F)82 mm (3.2 inches)62%very high
August Weather23°C (73°F)36 mm (1.4 inches)48%very high
September Weather18°C (65°F)29 mm (1.2 inches)58%high
October Weather13°C (55°F)70 mm (2.7 inches)78%high
November Weather8°C (46°F)59 mm (2.3 inches)85%moderate
December Weather3°C (38°F)89 mm (3.5 inches)87%low

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