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September Weather in Karlovo, Bulgaria

Last updated: August 22, 2025

In September, the average temperature in Karlovo, Bulgaria hovers around 17°C (62°F). Expect a range with minimums dipping to 0°C (32°F) and maximums reaching 32°C (89°F). Precipitation is moderate, with an average of 42 mm (1.7 in) over 6 days, while the air remains comfortably humid at 59%. Enjoy the balance of warmth and freshness in this vibrant locale!

September Temperature in Karlovo

In September in Karlovo, the average temperature is 17°C (62°F). Maximums can reach 32°C (89°F) and minimums can drop as low as 0°C (32°F). Be sure to pack for both warm days and chilly nights while exploring this vibrant destination!

September Weather in Karlovo: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Karlovo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Karlovo, September typically has an average temperature of 17°C (62°F), with highs reaching up to 32°C (89°F) and lows dropping to around 0°C (32°F).
JanFebMarAprMayJunJulAugSepOctNovDec313640495864686962524335
Data source: Temperature data for Karlovo 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.

September Precipitation in Karlovo

In Karlovo in September, the total precipitation amount is 42 mm (1.7 in) spread over 6 days.

September Precipitation Trends in Karlovo

The chart displays monthly precipitation patterns in Karlovo, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Karlovo, September typically receives around 42 mm (1.7 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec565789691211671576042675581
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Karlovo

In Karlovo in September humidity is 59%. With an average temperature of 17°C (62°F), this humidity feels like a refreshing but slightly sticky embrace, making travel enjoyable yet requiring a light layer to stay comfortable as you explore the surroundings.

September Average Humidity in Karlovo

This chart illustrates the average monthly humidity levels in Karlovo, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Karlovo is approximately 59%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%85%83%71%73%67%68%50%59%79%87%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Karlovo

In Karlovo in September, 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 Karlovo.

Maximum UV Index Levels in Karlovo for September

The chart shows the monthly maximum UV Index (UVI) for Karlovo in September, 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 September, the maximum UV index in Karlovo typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24789101097632
Data source: Karlovo September 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 September Weather in Karlovo Compares to Other Months

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

This table compares monthly weather conditions in Karlovo, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (31°F)56 mm (2.2 inches)89%low
February Weather2°C (36°F)57 mm (2.2 inches)85%moderate
March Weather5°C (40°F)89 mm (3.5 inches)83%high
April Weather9°C (49°F)69 mm (2.7 inches)71%very high
May Weather14°C (58°F)121 mm (4.8 inches)73%very high
June Weather18°C (64°F)167 mm (6.6 inches)67%very high
July Weather20°C (68°F)157 mm (6.2 inches)68%very high
August Weather21°C (70°F)60 mm (2.3 inches)50%very high
September Weather17°C (62°F)42 mm (1.7 inches)59%high
October Weather11°C (52°F)67 mm (2.6 inches)79%high
November Weather6°C (43°F)55 mm (2.2 inches)87%moderate
December Weather2°C (36°F)81 mm (3.2 inches)89%low

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