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September Weather in Hermiswil, Switzerland

Last updated: August 27, 2025

In September, the average temperature in Hermiswil, Switzerland is a comfortable 13°C (55°F). However, temperatures can fluctuate, with a minimum of 1°C (34°F) and a maximum reaching 25°C (78°F). Expect 105 mm (4.1 in) of precipitation spread over about 13 days, contributing to an average humidity of 81%. Perfect for those who enjoy a refreshing atmosphere!

September Temperature in Hermiswil

In September in Hermiswil, the average temperature is 13°C (55°F). The maximum can reach 25°C (78°F), and the minimum can be as low as 1°C (34°F). This makes it an ideal time for travelers who enjoy mild weather and a mix of both warm and cooler days.

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

The chart illustrates September temperature patterns in Hermiswil, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hermiswil, September typically has an average temperature of 13°C (55°F), with highs reaching up to 25°C (78°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec293338455160626255473732
Data source: Temperature data for Hermiswil 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 Hermiswil

In Hermiswil in September, the precipitation amount is 105 mm (4.1 in) over the course of 13 days.

September Precipitation Trends in Hermiswil

The chart displays monthly precipitation patterns in Hermiswil, 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 Hermiswil, September typically receives around 105 mm (4.1 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec113991218818219819717610512294169
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Hermiswil

In Hermiswil in September, humidity is 81%. With an average temperature of 13°C (55°F), this humidity feels like a damp blanket wrapping around you, making strolls outdoors feel heavy and slightly oppressive, which may be less than ideal for travelers looking to explore comfortably.

September Average Humidity in Hermiswil

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

In Hermiswil 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 Hermiswil.

Maximum UV Index Levels in Hermiswil for September

The chart shows the monthly maximum UV Index (UVI) for Hermiswil 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 Hermiswil typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24679101097532
Data source: Hermiswil 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 Hermiswil Compares to Other Months

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

This table compares monthly weather conditions in Hermiswil, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)113 mm (4.5 inches)91%low
February Weather1°C (34°F)99 mm (3.9 inches)89%moderate
March Weather3°C (39°F)121 mm (4.7 inches)87%high
April Weather7°C (45°F)88 mm (3.5 inches)84%high
May Weather11°C (51°F)182 mm (7.2 inches)80%very high
June Weather16°C (60°F)197 mm (7.8 inches)82%very high
July Weather17°C (63°F)197 mm (7.8 inches)82%very high
August Weather17°C (62°F)176 mm (6.9 inches)77%very high
September Weather13°C (55°F)105 mm (4.1 inches)81%high
October Weather8°C (48°F)122 mm (4.8 inches)89%moderate
November Weather3°C (38°F)94 mm (3.7 inches)89%moderate
December Weather0°C (32°F)169 mm (6.7 inches)91%low

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