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September Weather in Kloten, Switzerland

Last updated: August 27, 2025

In September, the average temperature in Kloten, Switzerland hovers around 15°C (60°F), with the possibility of dipping to a chilly 3°C (38°F) or soaring to a warm 29°C (84°F). Expect about 80 mm (3.2 in) of precipitation over 11 days, contributing to an average humidity of 83%. Plan accordingly for a mix of mild days and wet weather!

September Temperature in Kloten

In September in Kloten, the average temperature is 15°C (60°F). Maximum temperatures can reach 29°C (84°F), while the minimum can drop as low as 3°C (38°F). It's advisable to pack layers to comfortably enjoy all the activities this month in Kloten has to offer.

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

The chart illustrates September temperature patterns in Kloten, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Kloten, September typically has an average temperature of 15°C (60°F), with highs reaching up to 29°C (84°F) and lows dropping to around 3°C (38°F).
JanFebMarAprMayJunJulAugSepOctNovDec343843505666686759514137
Data source: Temperature data for Kloten 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 Kloten

In Kloten in September, the precipitation amount is 80 mm (3.2 in) spread over 11 days.

September Precipitation Trends in Kloten

The chart displays monthly precipitation patterns in Kloten, 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 Kloten, September typically receives around 80 mm (3.2 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec9575865912312899120809365124
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Kloten

In Kloten in September humidity is 83%. With an average temperature of 15°C (60°F), this humidity feels like a damp blanket wrapping around you, making travel a bit uncomfortable and sticky, as the air clings to your skin and dampens your clothes.

September Average Humidity in Kloten

This chart illustrates the average monthly humidity levels in Kloten, 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 Kloten is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec92%89%87%84%80%82%83%80%83%90%89%90%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Kloten

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

Maximum UV Index Levels in Kloten for September

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

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

This table compares monthly weather conditions in Kloten, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)95 mm (3.7 inches)92%low
February Weather3°C (39°F)75 mm (3.0 inches)89%moderate
March Weather6°C (43°F)86 mm (3.4 inches)87%moderate
April Weather10°C (50°F)59 mm (2.3 inches)84%high
May Weather13°C (56°F)123 mm (4.8 inches)80%very high
June Weather19°C (66°F)128 mm (5.0 inches)82%very high
July Weather20°C (68°F)99 mm (3.9 inches)83%very high
August Weather20°C (67°F)120 mm (4.7 inches)80%very high
September Weather15°C (60°F)80 mm (3.2 inches)83%high
October Weather11°C (51°F)93 mm (3.6 inches)90%moderate
November Weather5°C (41°F)65 mm (2.6 inches)88%low
December Weather3°C (37°F)124 mm (4.9 inches)90%low

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