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September Weather in Erstfeld, Switzerland

Last updated: August 27, 2025

In September, the average temperature in Erstfeld, Switzerland hovers around 8°C (46°F). You can expect a chill with minimums plummeting to -10°C (14°F), while highs can reach up to 20°C (69°F). Rainfall is fairly frequent, with a total precipitation of 164 mm (6.5 in) spread over 15 days. Additionally, the average humidity is notably high at 83%, making for a damp atmosphere.

September Temperature in Erstfeld

In September in Erstfeld, the average temperature is 8°C (46°F), with maximums potentially reaching 20°C (69°F) and minimums dipping down to -10°C (14°F). Travelers should be prepared for a wide range of temperatures and pack accordingly to ensure comfort during their visit.

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

The chart illustrates September temperature patterns in Erstfeld, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Erstfeld, September typically has an average temperature of 8°C (46°F), with highs reaching up to 20°C (69°F) and lows dropping to around -10°C (14°F).
JanFebMarAprMayJunJulAugSepOctNovDec172226334051535246382720
Data source: Temperature data for Erstfeld 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 Erstfeld

In Erstfeld in September, the total precipitation amount is 164 mm (6.5 in) spread over the course of 15 days.

September Precipitation Trends in Erstfeld

The chart displays monthly precipitation patterns in Erstfeld, 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 Erstfeld, September typically receives around 164 mm (6.5 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec13692126104154193207269164179117178
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Erstfeld

In Erstfeld in September, humidity is 83%. With an average temperature of 8°C (46°F), this humidity feels like a damp chill that seeps into your bones, making even short outings feel quite uncomfortable and prompting travelers to bundle up and seek shelter more frequently.

September Average Humidity in Erstfeld

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

In Erstfeld 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 Erstfeld.

Maximum UV Index Levels in Erstfeld for September

The chart shows the monthly maximum UV Index (UVI) for Erstfeld 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 Erstfeld typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24789101097532
Data source: Erstfeld 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 Erstfeld Compares to Other Months

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

This table compares monthly weather conditions in Erstfeld, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-8°C (17°F)136 mm (5.4 inches)92%low
February Weather-6°C (22°F)92 mm (3.6 inches)89%moderate
March Weather-3°C (27°F)126 mm (5.0 inches)87%high
April Weather0°C (33°F)104 mm (4.1 inches)84%very high
May Weather4°C (40°F)154 mm (6.1 inches)80%very high
June Weather10°C (51°F)192 mm (7.6 inches)82%very high
July Weather12°C (53°F)207 mm (8.1 inches)83%very high
August Weather11°C (53°F)269 mm (10.6 inches)80%very high
September Weather8°C (46°F)164 mm (6.5 inches)83%high
October Weather3°C (38°F)179 mm (7.0 inches)90%moderate
November Weather-3°C (27°F)117 mm (4.6 inches)88%moderate
December Weather-7°C (20°F)178 mm (7.0 inches)90%low

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