September Weather in Opan, Bulgaria

Last updated: August 22, 2025

In September, the average temperature in Opan, Bulgaria hovers around 22°C (71°F). However, temperatures can vary widely, with a minimum of 5°C (41°F) and a scorching maximum reaching 37°C (99°F). You can expect some light rainfall, with a total precipitation of 18 mm (0.7 in) over about 3 days. On top of that, the average humidity sits at a comfortable 58%, making it a pleasant time to visit!

September Temperature in Opan

In September in Opan, the average temperature is 22°C (71°F). The maximum can reach 37°C (99°F), while the minimum can drop as low as 5°C (41°F). This diverse range of temperatures makes Opan a great destination for travelers seeking both warm and cooler weather experiences.

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

The chart illustrates September temperature patterns in Opan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Opan, September typically has an average temperature of 22°C (71°F), with highs reaching up to 37°C (99°F) and lows dropping to around 5°C (41°F).

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

September Precipitation in Opan

In Opan in September, the precipitation amount is 18 mm (0.7 in) over a span of 3 days.

September Precipitation Trends in Opan

The chart displays monthly precipitation patterns in Opan, 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 Opan, September typically receives around 18 mm (0.7 inches) of precipitation spread over approximately 3 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 Opan

In Opan in September, humidity is 58%. With an average temperature of 22°C (71°F), this humidity feels like a warm embrace, making it ideal for leisurely strolls and outdoor activities, but travelers should stay hydrated to fully enjoy the experience.

September Average Humidity in Opan

This chart illustrates the average monthly humidity levels in Opan, 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 Opan is approximately 58%, 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 Opan

In Opan 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 Opan.

Maximum UV Index Levels in Opan for September

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

Data source: Opan 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 Opan Compares to Other Months

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

This table compares monthly weather conditions in Opan, 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 (36°F)	47 mm (1.8 inches)	88%	low
February Weather	5°C (42°F)	43 mm (1.7 inches)	84%	moderate
March Weather	8°C (47°F)	63 mm (2.5 inches)	81%	high
April Weather	13°C (55°F)	42 mm (1.7 inches)	70%	very high
May Weather	19°C (66°F)	52 mm (2.0 inches)	72%	very high
June Weather	22°C (72°F)	92 mm (3.6 inches)	66%	very high
July Weather	26°C (78°F)	48 mm (1.9 inches)	62%	very high
August Weather	26°C (80°F)	17 mm (0.7 inches)	48%	very high
September Weather	22°C (71°F)	18 mm (0.7 inches)	58%	high
October Weather	15°C (59°F)	73 mm (2.9 inches)	78%	high
November Weather	10°C (49°F)	60 mm (2.4 inches)	85%	moderate
December Weather	5°C (42°F)	77 mm (3.0 inches)	87%	low