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September Weather in Sankt Antoni, Switzerland

Last updated: August 27, 2025

In September, the average temperature in Sankt Antoni, Switzerland hovers around 14°C (57°F), creating a comfortable yet variable climate. Expect minimum temperatures to drop to 2°C (35°F), while highs can reach 27°C (81°F). With an average rainfall of 87 mm (3.4 in) spread over 12 days, it's wise to prepare for occasional showers. Additionally, the average humidity sits at a substantial 81%, adding to the overall atmosphere of this picturesque location.

September Temperature in Sankt Antoni

In September in Sankt Antoni, the average temperature is 14°C (57°F). Maximums can reach 27°C (81°F), while minimums can drop as low as 2°C (35°F). This makes it a great time for travelers to enjoy mild weather and explore the area comfortably.

September Weather in Sankt Antoni: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Sankt Antoni, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sankt Antoni, September typically has an average temperature of 14°C (57°F), with highs reaching up to 27°C (81°F) and lows dropping to around 2°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec313639465362646356483833
Data source: Temperature data for Sankt Antoni 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 Sankt Antoni

In Sankt Antoni in September, the precipitation amount is 87 mm (3.4 in) over the course of 12 days.

September Precipitation Trends in Sankt Antoni

The chart displays monthly precipitation patterns in Sankt Antoni, 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 Sankt Antoni, September typically receives around 87 mm (3.4 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec10593114711701431621438711391167
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Sankt Antoni

In Sankt Antoni in September, humidity is 81%. With an average temperature of 14°C (57°F), this humidity feels like a warm, dense blanket that clings to your skin, making outdoor exploration a bit heavier and more tiring.

September Average Humidity in Sankt Antoni

This chart illustrates the average monthly humidity levels in Sankt Antoni, 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 Sankt Antoni 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 Sankt Antoni

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

Maximum UV Index Levels in Sankt Antoni for September

The chart shows the monthly maximum UV Index (UVI) for Sankt Antoni 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 Sankt Antoni typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2367810986532
Data source: Sankt Antoni 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 Sankt Antoni Compares to Other Months

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

This table compares monthly weather conditions in Sankt Antoni, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (31°F)105 mm (4.1 inches)91%low
February Weather2°C (36°F)93 mm (3.6 inches)89%moderate
March Weather4°C (40°F)114 mm (4.5 inches)87%high
April Weather8°C (46°F)71 mm (2.8 inches)84%high
May Weather11°C (53°F)170 mm (6.7 inches)80%very high
June Weather16°C (62°F)143 mm (5.6 inches)82%very high
July Weather18°C (64°F)162 mm (6.4 inches)82%very high
August Weather17°C (64°F)143 mm (5.6 inches)77%very high
September Weather14°C (57°F)87 mm (3.4 inches)81%high
October Weather9°C (49°F)113 mm (4.4 inches)89%moderate
November Weather4°C (39°F)91 mm (3.6 inches)89%moderate
December Weather1°C (33°F)166 mm (6.6 inches)91%low

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