September Weather in Harmanli, Bulgaria

Last updated: August 22, 2025

In Harmanli, Bulgaria, the average temperature in September is a pleasant 21°C (71°F). Expect a minimum dip of 5°C (42°F) and a potential high of 36°C (96°F). During this month, you can anticipate 23 mm (0.9 in) of precipitation spread over about 4 days, contributing to an average humidity of 57%. Enjoy the variety of weather as you explore!

September Temperature in Harmanli

In September in Harmanli, the average temperature is 21°C (71°F), with maximums reaching up to 36°C (96°F) and minimums dropping as low as 5°C (42°F). It's a great time for travelers to enjoy mild weather, though it's wise to prepare for both warm days and cooler evenings.

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

The chart illustrates September temperature patterns in Harmanli, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Harmanli, September typically has an average temperature of 21°C (71°F), with highs reaching up to 36°C (96°F) and lows dropping to around 5°C (42°F).

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

September Precipitation in Harmanli

In Harmanli in September, the total precipitation amount is 23 mm (0.9 in) over a span of 4 days.

September Precipitation Trends in Harmanli

The chart displays monthly precipitation patterns in Harmanli, 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 Harmanli, September typically receives around 23 mm (0.9 inches) of precipitation spread over approximately 4 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Harmanli

In Harmanli in September humidity is 57%. With an average temperature of 21°C (71°F), this humidity feels like a warm embrace, making it a pleasant atmosphere for traveling, as long as you're prepared for a slight stickiness in the air that enhances the tropical vibe of the surroundings.

September Average Humidity in Harmanli

This chart illustrates the average monthly humidity levels in Harmanli, 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 Harmanli is approximately 57%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Harmanli

In Harmanli 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 Harmanli.

Maximum UV Index Levels in Harmanli for September

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

Data source: Harmanli 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 Harmanli Compares to Other Months

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

This table compares monthly weather conditions in Harmanli, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	2°C (37°F)	55 mm (2.2 inches)	87%	low
February Weather	5°C (42°F)	48 mm (1.9 inches)	84%	moderate
March Weather	8°C (46°F)	68 mm (2.7 inches)	81%	high
April Weather	12°C (55°F)	51 mm (2.0 inches)	72%	high
May Weather	18°C (65°F)	61 mm (2.4 inches)	74%	very high
June Weather	22°C (71°F)	108 mm (4.2 inches)	65%	very high
July Weather	25°C (77°F)	49 mm (1.9 inches)	59%	very high
August Weather	26°C (79°F)	17 mm (0.7 inches)	49%	very high
September Weather	21°C (71°F)	23 mm (0.9 inches)	57%	high
October Weather	15°C (59°F)	81 mm (3.2 inches)	76%	high
November Weather	10°C (50°F)	58 mm (2.3 inches)	84%	moderate
December Weather	6°C (42°F)	85 mm (3.3 inches)	86%	low