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September Weather in Andeer, Switzerland

Last updated: August 27, 2025

In September, the average temperature in Andeer, Switzerland hovers around 7°C (46°F). Expect a minimum plunge to -12°C (11°F) and a maximum rise to 19°C (67°F). With 122 mm (4.8 in) of precipitation spread across 15 days, be prepared for a wet experience. The average humidity remains high at 83%, creating a chill that may feel more pronounced!

September Temperature in Andeer

In September in Andeer, the average temperature is 7°C (46°F). Maximums can reach 19°C (67°F) and minimums can be as low as -12°C (11°F). Travelers should be prepared for a wide range of temperatures, ensuring they pack both warm clothing for the chilly nights and lighter layers for the milder days.

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

The chart illustrates September temperature patterns in Andeer, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Andeer, September typically has an average temperature of 7°C (46°F), with highs reaching up to 19°C (67°F) and lows dropping to around -12°C (11°F).
JanFebMarAprMayJunJulAugSepOctNovDec152126334050535345382719
Data source: Temperature data for Andeer 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 Andeer

In Andeer in September, the precipitation amount is 122 mm (4.8 in) over a span of 15 days.

September Precipitation Trends in Andeer

The chart displays monthly precipitation patterns in Andeer, 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 Andeer, September typically receives around 122 mm (4.8 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec745792109148153130179122160134128
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Andeer

In Andeer in September humidity is 83%. With average temperature 7°C (46°F), this humidity feels like a damp chill that seeps into your clothes, making every outdoor excursion feel heavier and less invigorating, requiring a thicker jacket and a more cautious step as you navigate the slightly slippery terrain.

September Average Humidity in Andeer

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

In Andeer 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 Andeer.

Maximum UV Index Levels in Andeer for September

The chart shows the monthly maximum UV Index (UVI) for Andeer 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 Andeer typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24689101097632
Data source: Andeer 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 Andeer Compares to Other Months

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

This table compares monthly weather conditions in Andeer, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-9°C (15°F)74 mm (2.9 inches)92%low
February Weather-6°C (21°F)57 mm (2.2 inches)89%moderate
March Weather-4°C (26°F)92 mm (3.6 inches)87%high
April Weather0°C (33°F)109 mm (4.3 inches)84%very high
May Weather5°C (41°F)148 mm (5.8 inches)80%very high
June Weather10°C (51°F)153 mm (6.0 inches)82%very high
July Weather12°C (53°F)130 mm (5.1 inches)83%very high
August Weather11°C (53°F)179 mm (7.0 inches)80%very high
September Weather7°C (46°F)122 mm (4.8 inches)83%high
October Weather3°C (38°F)160 mm (6.3 inches)90%high
November Weather-3°C (27°F)134 mm (5.3 inches)88%moderate
December Weather-7°C (19°F)128 mm (5.1 inches)90%low

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