nomadseason

September Weather in Costieni, Romania

Last updated: August 27, 2025

In September, the average temperature in Costieni, Romania is a comfortable 20°C (68°F), with fluctuations that can dip to a chilly 1°C (34°F) or soar to a warm 35°C (95°F). This month sees about 21 mm (0.8 in) of precipitation spread across 4 days, and with an average humidity of 57%, it’s a perfect time to enjoy the refreshing climate.

September Temperature in Costieni

In September in Costieni, the average temperature is 20°C (68°F). Maximum temperatures can reach 35°C (95°F), while minimums can drop as low as 1°C (34°F). This varying climate makes Costieni an exciting destination for travelers seeking both warm days and cool evenings.

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

The chart illustrates September temperature patterns in Costieni, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Costieni, September typically has an average temperature of 20°C (68°F), with highs reaching up to 35°C (95°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec333744536472757767554537
Data source: Temperature data for Costieni generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Costieni

In Costieni in September, the precipitation amount is 21 mm (0.8 in) over a span of 4 days.

September Precipitation Trends in Costieni

The chart displays monthly precipitation patterns in Costieni, 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 Costieni, September typically receives around 21 mm (0.8 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec334041415088701921493767
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Costieni

In Costieni in September humidity is 57%. With an average temperature of 20°C (68°F), this humidity feels like a pleasantly mild and comfortable climate for traveling, making outdoor exploration enjoyable without the discomfort of excessive heat or stickiness.

September Average Humidity in Costieni

This chart illustrates the average monthly humidity levels in Costieni, 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 Costieni is approximately 57%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%85%82%73%71%70%66%48%57%79%88%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Costieni

In Costieni 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 Costieni.

Maximum UV Index Levels in Costieni for September

The chart shows the monthly maximum UV Index (UVI) for Costieni 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 Costieni typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235789987532
Data source: Costieni 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 Costieni Compares to Other Months

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

This table compares monthly weather conditions in Costieni, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (33°F)33 mm (1.3 inches)88%low
February Weather3°C (38°F)40 mm (1.6 inches)85%moderate
March Weather6°C (44°F)41 mm (1.6 inches)82%moderate
April Weather12°C (54°F)41 mm (1.6 inches)73%high
May Weather18°C (64°F)50 mm (2.0 inches)71%very high
June Weather22°C (72°F)88 mm (3.5 inches)70%very high
July Weather24°C (75°F)70 mm (2.8 inches)66%very high
August Weather25°C (77°F)19 mm (0.7 inches)48%very high
September Weather20°C (68°F)21 mm (0.8 inches)57%high
October Weather13°C (56°F)49 mm (1.9 inches)79%moderate
November Weather7°C (45°F)37 mm (1.5 inches)87%moderate
December Weather3°C (37°F)67 mm (2.7 inches)88%low

Compare Costieni's Climate with Cities Worldwide