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September Weather in Trnov, Czech Republic

Last updated: August 23, 2025

In Trnov, Czech Republic, the average temperature in September hovers around 14°C (57°F). Expect a slight chill with minimums dropping to 0°C (32°F), while sunny days can reach a pleasant 28°C (83°F). During this month, anticipate 83 mm (3.3 in) of precipitation spread across 11 days, offering a humidity level of about 72%. Prepare for a mix of weather!

September Temperature in Trnov

In September in Trnov, the average temperature is 14°C (57°F), with maximums reaching 28°C (83°F) and minimums dropping as low as 0°C (32°F). It's advisable to pack layers to accommodate the fluctuating temperatures during your travels.

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

The chart illustrates September temperature patterns in Trnov, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Trnov, September typically has an average temperature of 14°C (57°F), with highs reaching up to 28°C (83°F) and lows dropping to around 0°C (32°F).
JanFebMarAprMayJunJulAugSepOctNovDec293338465464646657494034
Data source: Temperature data for Trnov 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 Trnov

In Trnov in September, the precipitation amount is 83 mm (3.3 in) over the course of 11 days.

September Precipitation Trends in Trnov

The chart displays monthly precipitation patterns in Trnov, 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 Trnov, September typically receives around 83 mm (3.3 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec545758419290879083754569
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Trnov

In Trnov in September humidity is 72%. With an average temperature of 14°C (57°F), this humidity feels like a damp embrace, making outdoor activities slightly uncomfortable and requiring careful planning to stay hydrated and enjoy your travels.

September Average Humidity in Trnov

This chart illustrates the average monthly humidity levels in Trnov, 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 Trnov is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%87%84%78%63%63%61%65%72%80%87%91%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Trnov

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

Maximum UV Index Levels in Trnov for September

The chart shows the monthly maximum UV Index (UVI) for Trnov 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 Trnov typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec234678876421
Data source: Trnov 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 Trnov Compares to Other Months

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

This table compares monthly weather conditions in Trnov, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)54 mm (2.1 inches)89%low
February Weather1°C (33°F)57 mm (2.2 inches)87%moderate
March Weather3°C (38°F)58 mm (2.3 inches)84%moderate
April Weather8°C (47°F)41 mm (1.6 inches)78%high
May Weather12°C (54°F)92 mm (3.6 inches)63%high
June Weather18°C (64°F)90 mm (3.5 inches)63%very high
July Weather18°C (65°F)87 mm (3.4 inches)61%very high
August Weather19°C (66°F)90 mm (3.5 inches)65%high
September Weather14°C (57°F)83 mm (3.3 inches)72%high
October Weather10°C (49°F)74 mm (2.9 inches)80%moderate
November Weather5°C (41°F)45 mm (1.8 inches)87%low
December Weather1°C (34°F)69 mm (2.7 inches)91%low

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