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September Weather in Hasle, Switzerland

Last updated: August 27, 2025

In September, the average temperature in Hasle, Switzerland hovers around 14°C (57°F). Expect a comfortable range, with minimums dipping to 1°C (35°F) and maximums reaching 26°C (79°F). Throughout the month, you can anticipate approximately 102 mm (4.0 in) of precipitation over 15 days, contributing to an average humidity of 83%.

September Temperature in Hasle

In September, in Hasle, the average temperature is 14°C (57°F). Maximums can reach 26°C (79°F), while minimums can drop as low as 1°C (35°F). This variability makes it essential for travelers to pack layers to comfortably navigate the changing weather.

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

The chart illustrates September temperature patterns in Hasle, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hasle, September typically has an average temperature of 14°C (57°F), with highs reaching up to 26°C (79°F) and lows dropping to around 1°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec323640465362646457493935
Data source: Temperature data for Hasle 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 Hasle

In Hasle in September, the precipitation amount is 102 mm (4.0 in) over the course of 15 days.

September Precipitation Trends in Hasle

The chart displays monthly precipitation patterns in Hasle, 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 Hasle, September typically receives around 102 mm (4.0 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec121961148815916016515710213180152
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Hasle

In Hasle in September, humidity is 83%. With an average temperature of 14°C (57°F), this humidity feels like you're stepping into a warm, damp embrace that can make outdoor activities quite uncomfortable, often leaving you sweaty and exhausted if you're not prepared with plenty of water and breathable clothing.

September Average Humidity in Hasle

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

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

Maximum UV Index Levels in Hasle for September

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

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

This table compares monthly weather conditions in Hasle, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)120 mm (4.7 inches)92%low
February Weather2°C (36°F)96 mm (3.8 inches)89%moderate
March Weather5°C (40°F)114 mm (4.5 inches)87%moderate
April Weather8°C (47°F)88 mm (3.4 inches)84%high
May Weather12°C (53°F)159 mm (6.3 inches)80%very high
June Weather17°C (62°F)159 mm (6.3 inches)82%very high
July Weather18°C (65°F)165 mm (6.5 inches)83%very high
August Weather18°C (64°F)157 mm (6.2 inches)80%very high
September Weather14°C (57°F)102 mm (4.0 inches)83%high
October Weather10°C (49°F)131 mm (5.2 inches)90%moderate
November Weather4°C (40°F)80 mm (3.2 inches)88%low
December Weather1°C (35°F)152 mm (6.0 inches)90%low

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