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September Weather in Trnovlje pri Celju, Slovenia

Last updated: August 27, 2025

In Trnovlje pri Celju, Slovenia, the average temperature in September is a mild 16°C (61°F). Expect nighttime lows dipping to 2°C (36°F) and daytime highs soaring up to 30°C (87°F). During this month, you can anticipate about 127 mm (5.0 in) of precipitation spread over 12 days, contributing to an average humidity of 65%.

September Temperature in Trnovlje pri Celju

In September in Trnovlje pri Celju, the average temperature is 16°C (61°F). Maximums can reach 30°C (87°F) and minimums can be as low as 2°C (36°F). This makes it a great time for travelers to enjoy a mix of mild weather and more energetic days.

September Weather in Trnovlje pri Celju: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Trnovlje pri Celju, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Trnovlje pri Celju, September typically has an average temperature of 16°C (61°F), with highs reaching up to 30°C (87°F) and lows dropping to around 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec333843515868707061524335
Data source: Temperature data for Trnovlje pri Celju 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 Trnovlje pri Celju

In Trnovlje pri Celju in September, the precipitation amount is 127 mm (5.0 in) occurring over the course of 12 days.

September Precipitation Trends in Trnovlje pri Celju

The chart displays monthly precipitation patterns in Trnovlje pri Celju, 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 Trnovlje pri Celju, September typically receives around 127 mm (5.0 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec3764578014282121104127719886
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Trnovlje pri Celju

In Trnovlje pri Celju in September, humidity is 65%. With an average temperature of 16°C (61°F), this humidity feels like a gentle warmth enveloping you, making it ideal for exploring the sights without overwhelming discomfort.

September Average Humidity in Trnovlje pri Celju

This chart illustrates the average monthly humidity levels in Trnovlje pri Celju, 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 Trnovlje pri Celju is approximately 65%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%84%78%73%71%73%70%60%65%84%89%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Trnovlje pri Celju

In Trnovlje pri Celju in September, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Trnovlje pri Celju, you can refer to this Hourly UV Index in Trnovlje pri Celju.

Maximum UV Index Levels in Trnovlje pri Celju for September

The chart shows the monthly maximum UV Index (UVI) for Trnovlje pri Celju 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 Trnovlje pri Celju typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689986432
Data source: Trnovlje pri Celju 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 Trnovlje pri Celju Compares to Other Months

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

This table compares monthly weather conditions in Trnovlje pri Celju, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (33°F)37 mm (1.5 inches)90%low
February Weather3°C (38°F)64 mm (2.5 inches)84%moderate
March Weather6°C (43°F)57 mm (2.2 inches)78%moderate
April Weather10°C (51°F)80 mm (3.2 inches)73%high
May Weather15°C (58°F)142 mm (5.6 inches)71%very high
June Weather20°C (68°F)82 mm (3.2 inches)73%very high
July Weather21°C (70°F)121 mm (4.8 inches)70%very high
August Weather21°C (70°F)104 mm (4.1 inches)60%very high
September Weather16°C (61°F)127 mm (5.0 inches)65%high
October Weather11°C (52°F)71 mm (2.8 inches)84%moderate
November Weather6°C (43°F)98 mm (3.9 inches)89%moderate
December Weather2°C (35°F)86 mm (3.4 inches)89%low

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