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September Weather in Diez, Germany

Last updated: August 23, 2025

In September, the average temperature in Diez, Germany hovers around 15°C (59°F). Expect a minimum temperature of 3°C (37°F) and a maximum of 31°C (89°F). With an average precipitation of 51 mm (2.0 in) over 8 days, and a humidity level of 82%, prepare for a climate that is both varied and slightly humid.

September Temperature in Diez

In September in Diez, the average temperature is 15°C (59°F). The maximum can reach 31°C (89°F) while the minimum can be as low as 3°C (37°F). It's advisable to pack both light clothing for the warm days and warmer layers for the cool evenings when traveling during this time.

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

The chart illustrates September temperature patterns in Diez, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Diez, September typically has an average temperature of 15°C (59°F), with highs reaching up to 31°C (89°F) and lows dropping to around 3°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec353842495565666658514138
Data source: Temperature data for Diez 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 Diez

In Diez in September, the total precipitation amount is 51 mm (2.0 in), spread over a duration of 8 days.

September Precipitation Trends in Diez

The chart displays monthly precipitation patterns in Diez, 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 Diez, September typically receives around 51 mm (2.0 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec6659724077887369525849103
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Diez

In Diez in September, humidity is 82%. With an average temperature of 15°C (59°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities feel sticky and uncomfortable for travelers.

September Average Humidity in Diez

This chart illustrates the average monthly humidity levels in Diez, 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 Diez is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec92%90%87%83%76%74%74%75%82%88%91%92%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Diez

In Diez in September, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Diez.

Maximum UV Index Levels in Diez for September

The chart shows the monthly maximum UV Index (UVI) for Diez 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 Diez typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec234578875421
Data source: Diez 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 Diez Compares to Other Months

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

This table compares monthly weather conditions in Diez, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (35°F)66 mm (2.6 inches)92%low
February Weather3°C (38°F)59 mm (2.3 inches)90%moderate
March Weather6°C (42°F)72 mm (2.9 inches)87%moderate
April Weather9°C (49°F)40 mm (1.6 inches)83%moderate
May Weather13°C (56°F)77 mm (3.0 inches)76%high
June Weather18°C (65°F)88 mm (3.5 inches)74%very high
July Weather19°C (66°F)73 mm (2.9 inches)74%very high
August Weather19°C (66°F)69 mm (2.7 inches)75%high
September Weather15°C (59°F)51 mm (2.0 inches)82%moderate
October Weather11°C (51°F)58 mm (2.3 inches)88%moderate
November Weather5°C (42°F)49 mm (1.9 inches)90%low
December Weather3°C (38°F)103 mm (4.1 inches)92%low

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