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September Weather in Crnomelj, Slovenia

Last updated: August 27, 2025

In Crnomelj, Slovenia, the average temperature in September hovers around 16°C (61°F), with a minimum of 2°C (36°F) and a peak reaching 32°C (90°F). The weather can be quite changeable, bringing about 138 mm (5.4 in) of precipitation over 12 days, resulting in an average humidity of 62%. Prepare for a mix of mild days and occasional showers!

September Temperature in Crnomelj

In September in Crnomelj, the average temperature is 16°C (61°F). Maximums can reach 32°C (90°F), while minimums can drop as low as 2°C (36°F). This diverse temperature range makes it essential for travelers to pack both light clothing for daytime excursions and warmer layers for cooler evenings.

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

The chart illustrates September temperature patterns in Crnomelj, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Crnomelj, September typically has an average temperature of 16°C (61°F), with highs reaching up to 32°C (90°F) and lows dropping to around 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec343943515968707161534537
Data source: Temperature data for Crnomelj 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 Crnomelj

In Crnomelj in September, the precipitation amount is 138 mm (5.4 in) spread over a period of 12 days.

September Precipitation Trends in Crnomelj

The chart displays monthly precipitation patterns in Crnomelj, 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 Crnomelj, September typically receives around 138 mm (5.4 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec629267891538310698138112118117
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Crnomelj

In Crnomelj in September, humidity is 62%. With an average temperature of 16°C (61°F), this humidity feels like a gentle blanket, making traveling comfortable yet occasionally sticky, prompting the need for light, breathable clothing to fully enjoy the sights.

September Average Humidity in Crnomelj

This chart illustrates the average monthly humidity levels in Crnomelj, 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 Crnomelj is approximately 62%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%83%75%72%70%69%64%51%62%81%87%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Crnomelj

In Crnomelj 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 Crnomelj, you can refer to this Hourly UV Index in Crnomelj.

Maximum UV Index Levels in Crnomelj for September

The chart shows the monthly maximum UV Index (UVI) for Crnomelj 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 Crnomelj typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689986532
Data source: Crnomelj 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 Crnomelj Compares to Other Months

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

This table compares monthly weather conditions in Crnomelj, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)62 mm (2.4 inches)89%low
February Weather4°C (40°F)92 mm (3.6 inches)83%moderate
March Weather6°C (44°F)67 mm (2.6 inches)75%moderate
April Weather11°C (51°F)89 mm (3.5 inches)72%high
May Weather15°C (59°F)153 mm (6.0 inches)70%very high
June Weather20°C (69°F)83 mm (3.3 inches)69%very high
July Weather21°C (71°F)106 mm (4.2 inches)64%very high
August Weather21°C (71°F)98 mm (3.9 inches)51%very high
September Weather16°C (61°F)138 mm (5.4 inches)62%high
October Weather12°C (53°F)112 mm (4.4 inches)81%moderate
November Weather7°C (45°F)118 mm (4.6 inches)87%moderate
December Weather3°C (38°F)117 mm (4.6 inches)88%low

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