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September Weather in Attiswil, Switzerland

Last updated: August 27, 2025

In September, the average temperature in Attiswil, Switzerland is a comfortable 15°C (59°F). Expect a minimum of 2°C (35°F) and a maximum of 29°C (84°F), offering a delightful range for outdoor activities. Though it's relatively humid at 81%, you might encounter precipitation measuring 77 mm (3.0 in) over 12 days. Make sure to pack accordingly for a well-rounded experience!

September Temperature in Attiswil

In September in Attiswil, the average temperature is 15°C (59°F). Maximum temperatures can reach 29°C (84°F), while minimum temperatures can be as low as 2°C (35°F). This diverse temperature range makes Attiswil an ideal destination for travelers seeking both warm and cool experiences.

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

The chart illustrates September temperature patterns in Attiswil, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Attiswil, September typically has an average temperature of 15°C (59°F), with highs reaching up to 29°C (84°F) and lows dropping to around 2°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec333842495564676659504036
Data source: Temperature data for Attiswil 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 Attiswil

In Attiswil in September, the precipitation amount is 77 mm (3.0 in) spread over 12 days.

September Precipitation Trends in Attiswil

The chart displays monthly precipitation patterns in Attiswil, 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 Attiswil, September typically receives around 77 mm (3.0 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec978097691491341401457710279130
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Attiswil

In Attiswil in September humidity is 81%. With an average temperature of 15°C (59°F), this humidity feels like a heavy blanket draped over you, making traveling quite uncomfortable as you constantly wipe away beads of sweat and feel the stickiness clinging to your clothes.

September Average Humidity in Attiswil

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

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

Maximum UV Index Levels in Attiswil for September

The chart shows the monthly maximum UV Index (UVI) for Attiswil 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 Attiswil typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689986422
Data source: Attiswil 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 Attiswil Compares to Other Months

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

This table compares monthly weather conditions in Attiswil, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (33°F)97 mm (3.8 inches)91%low
February Weather3°C (38°F)80 mm (3.1 inches)89%moderate
March Weather6°C (42°F)97 mm (3.8 inches)87%moderate
April Weather9°C (49°F)69 mm (2.7 inches)84%high
May Weather13°C (55°F)149 mm (5.9 inches)80%very high
June Weather18°C (65°F)134 mm (5.3 inches)82%very high
July Weather19°C (67°F)140 mm (5.5 inches)82%very high
August Weather19°C (66°F)145 mm (5.7 inches)77%very high
September Weather15°C (59°F)77 mm (3.0 inches)81%high
October Weather10°C (50°F)102 mm (4.0 inches)89%moderate
November Weather4°C (40°F)79 mm (3.1 inches)89%low
December Weather2°C (36°F)130 mm (5.1 inches)91%low

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