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September Weather in Sargans, Switzerland

Last updated: August 27, 2025

In Sargans, Switzerland, the average temperature in September hovers around 11°C (51°F). However, be prepared for chilly nights with minimums dipping to -4°C (25°F), while daytime highs can reach a pleasant 23°C (74°F). Expect precipitation around 166 mm (6.5 in) over roughly 16 days, coupled with an average humidity of 83%. Be ready for a wet and cool adventure!

September Temperature in Sargans

In September in Sargans, the average temperature is 11°C (51°F). The maximum can reach 23°C (74°F), while the minimum can drop as low as -4°C (25°F). Be prepared for a wide range of temperatures when traveling during this time.

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

The chart illustrates September temperature patterns in Sargans, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sargans, September typically has an average temperature of 11°C (51°F), with highs reaching up to 23°C (74°F) and lows dropping to around -4°C (25°F).
JanFebMarAprMayJunJulAugSepOctNovDec242934404756585851443526
Data source: Temperature data for Sargans 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 Sargans

In Sargans in September, the total precipitation amount is 166 mm (6.5 in) spread over 16 days.

September Precipitation Trends in Sargans

The chart displays monthly precipitation patterns in Sargans, 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 Sargans, September typically receives around 166 mm (6.5 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec1399512811319619721223916615599164
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Sargans

In Sargans in September, humidity is 83%. With an average temperature of 11°C (51°F), this humidity feels like a chilly dampness that clings to your skin, making any outdoor adventures a bit uncomfortable and best enjoyed with layered clothing and a light raincoat.

September Average Humidity in Sargans

This chart illustrates the average monthly humidity levels in Sargans, 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 Sargans 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 Sargans

In Sargans in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Sargans.

Maximum UV Index Levels in Sargans for September

The chart shows the monthly maximum UV Index (UVI) for Sargans 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 Sargans typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24678101087532
Data source: Sargans 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 Sargans Compares to Other Months

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

This table compares monthly weather conditions in Sargans, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (24°F)138 mm (5.5 inches)92%low
February Weather-2°C (29°F)94 mm (3.7 inches)89%moderate
March Weather1°C (34°F)128 mm (5.0 inches)87%high
April Weather5°C (41°F)113 mm (4.4 inches)84%high
May Weather8°C (48°F)196 mm (7.7 inches)80%very high
June Weather14°C (57°F)197 mm (7.8 inches)82%very high
July Weather14°C (58°F)212 mm (8.3 inches)83%very high
August Weather14°C (58°F)239 mm (9.4 inches)80%very high
September Weather11°C (51°F)166 mm (6.5 inches)83%high
October Weather7°C (44°F)155 mm (6.1 inches)90%moderate
November Weather1°C (35°F)99 mm (3.9 inches)88%moderate
December Weather-3°C (26°F)164 mm (6.4 inches)90%low

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