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September Weather in Costana, Romania

Last updated: August 27, 2025

In September, the average temperature in Costana, Romania hovers around 15°C (60°F), offering a mild climate for residents and visitors alike. Expect a minimum chill of 1°C (35°F) and a warm peak up to 33°C (92°F) during this month. Rainfall is moderate, with an average precipitation of 40 mm (1.6 in) over approximately 8 days. Additionally, the average humidity sits at a comfortable 62%, making this a pleasant time to experience all that Costana has to offer.

September Temperature in Costana

In September in Costana, the average temperature is 15°C (60°F). Maximum temperatures can reach 33°C (92°F), while minimums can drop as low as 1°C (35°F). Be sure to pack layers to accommodate the wide range of temperatures during your travels.

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

The chart illustrates September temperature patterns in Costana, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Costana, September typically has an average temperature of 15°C (60°F), with highs reaching up to 33°C (92°F) and lows dropping to around 1°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec293238495766686860504033
Data source: Temperature data for Costana 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 Costana

In Costana in September, the precipitation amount is 40 mm (1.6 in), occurring over a span of 8 days.

September Precipitation Trends in Costana

The chart displays monthly precipitation patterns in Costana, 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 Costana, September typically receives around 40 mm (1.6 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec2644514695122846840313455
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Costana

In Costana in September, humidity is 62%. With an average temperature of 15°C (60°F), this humidity feels like a warm embrace, making it a bit muggy for traveling, yet pleasantly refreshing for leisurely strolls and outdoor exploration.

September Average Humidity in Costana

This chart illustrates the average monthly humidity levels in Costana, 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 Costana is approximately 62%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec92%88%86%79%73%73%69%56%62%81%89%90%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Costana

In Costana 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 Costana.

Maximum UV Index Levels in Costana for September

The chart shows the monthly maximum UV Index (UVI) for Costana 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 Costana typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689987432
Data source: Costana 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 Costana Compares to Other Months

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

This table compares monthly weather conditions in Costana, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)26 mm (1.0 inches)92%low
February Weather0°C (33°F)44 mm (1.7 inches)88%moderate
March Weather4°C (39°F)51 mm (2.0 inches)86%moderate
April Weather9°C (49°F)46 mm (1.8 inches)79%high
May Weather14°C (58°F)95 mm (3.7 inches)73%very high
June Weather19°C (66°F)122 mm (4.8 inches)73%very high
July Weather20°C (68°F)84 mm (3.3 inches)68%very high
August Weather20°C (69°F)68 mm (2.7 inches)56%very high
September Weather15°C (60°F)40 mm (1.6 inches)62%high
October Weather10°C (51°F)31 mm (1.2 inches)80%moderate
November Weather4°C (40°F)34 mm (1.4 inches)89%moderate
December Weather1°C (33°F)54 mm (2.1 inches)90%low

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