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September Weather in Erlach, Switzerland

Last updated: August 27, 2025

In September, the average temperature in Erlach, Switzerland hovers around 14°C (58°F), with a minimum of 3°C (37°F) and a maximum reaching up to 28°C (82°F). During this time, expect about 83 mm (3.3 in) of precipitation spread over 12 days, contributing to an average humidity level of 81%.

September Temperature in Erlach

In September in Erlach, the average temperature is 14°C (58°F). The maximum can reach 28°C (82°F), and the minimum can be as low as 3°C (37°F). This climate makes it an ideal time for travelers to enjoy the outdoors while experiencing a comfortable range of temperatures.

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

The chart illustrates September temperature patterns in Erlach, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Erlach, September typically has an average temperature of 14°C (58°F), with highs reaching up to 28°C (82°F) and lows dropping to around 3°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec323641485463656458494035
Data source: Temperature data for Erlach 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 Erlach

In Erlach in September, the precipitation amount is 83 mm (3.3 in) distributed over the course of 12 days.

September Precipitation Trends in Erlach

The chart displays monthly precipitation patterns in Erlach, 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 Erlach, September typically receives around 83 mm (3.3 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec10987114651591351451308410890158
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Erlach

In Erlach in September, humidity is 81%. With an average temperature of 14°C (58°F), this humidity feels like a warm blanket wrapping around you, making outdoor adventures sticky and challenging, while also providing a lush, vibrant atmosphere perfect for exploring.

September Average Humidity in Erlach

This chart illustrates the average monthly humidity levels in Erlach, 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 Erlach is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%87%84%80%82%82%77%81%89%89%91%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Erlach

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

Maximum UV Index Levels in Erlach for September

The chart shows the monthly maximum UV Index (UVI) for Erlach 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 Erlach typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689986421
Data source: Erlach 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 Erlach Compares to Other Months

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

This table compares monthly weather conditions in Erlach, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)109 mm (4.3 inches)91%low
February Weather2°C (37°F)87 mm (3.4 inches)89%moderate
March Weather5°C (41°F)114 mm (4.5 inches)87%moderate
April Weather9°C (48°F)65 mm (2.6 inches)84%high
May Weather12°C (54°F)159 mm (6.3 inches)80%very high
June Weather17°C (63°F)135 mm (5.3 inches)82%very high
July Weather18°C (66°F)145 mm (5.7 inches)82%very high
August Weather18°C (65°F)130 mm (5.1 inches)77%very high
September Weather14°C (58°F)83 mm (3.3 inches)81%high
October Weather10°C (50°F)108 mm (4.3 inches)89%moderate
November Weather4°C (40°F)90 mm (3.5 inches)89%low
December Weather2°C (35°F)158 mm (6.2 inches)91%low

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