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September Weather in Raron, Switzerland

Last updated: August 27, 2025

In September, the average temperature in Raron, Switzerland hovers around 8°C (47°F). However, be prepared for temperature fluctuations, as it can drop to a chilly -6°C (22°F) at night or soar up to a pleasant 21°C (70°F) during the day. Expect 89 mm (3.5 in) of precipitation spread across 13 days, coupled with a humidity level of 83%, making this time of year quite a unique experience!

September Temperature in Raron

In September in Raron, the average temperature is 8°C (47°F). Maximums can reach 21°C (70°F), and minimums can be as low as -6°C (22°F). Be prepared for a mix of mild and chilly days, so pack layers for your travels!

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

The chart illustrates September temperature patterns in Raron, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Raron, September typically has an average temperature of 8°C (47°F), with highs reaching up to 21°C (70°F) and lows dropping to around -6°C (22°F).
JanFebMarAprMayJunJulAugSepOctNovDec142126344151555447382717
Data source: Temperature data for Raron 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 Raron

In Raron in September, the precipitation amount is 89 mm (3.5 in) distributed over 13 days.

September Precipitation Trends in Raron

The chart displays monthly precipitation patterns in Raron, 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 Raron, September typically receives around 89 mm (3.5 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec125821098914913010811989148109170
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Raron

In Raron in September humidity is 83%. With an average temperature of 8°C (47°F), this humidity feels like a chilly dampness that clings to your skin, making travel uncomfortable and leaving you yearning for warmth and dryness as you explore.

September Average Humidity in Raron

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

In Raron 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 Raron.

Maximum UV Index Levels in Raron for September

The chart shows the monthly maximum UV Index (UVI) for Raron 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 Raron typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec347810111097632
Data source: Raron 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 Raron Compares to Other Months

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

This table compares monthly weather conditions in Raron, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-10°C (15°F)125 mm (4.9 inches)92%moderate
February Weather-6°C (22°F)82 mm (3.2 inches)89%moderate
March Weather-3°C (27°F)109 mm (4.3 inches)87%high
April Weather1°C (34°F)89 mm (3.5 inches)84%very high
May Weather5°C (41°F)149 mm (5.9 inches)80%very high
June Weather11°C (51°F)130 mm (5.1 inches)82%extreme
July Weather13°C (55°F)108 mm (4.2 inches)83%very high
August Weather12°C (54°F)119 mm (4.7 inches)80%very high
September Weather8°C (47°F)89 mm (3.5 inches)83%high
October Weather4°C (39°F)148 mm (5.8 inches)90%high
November Weather-3°C (27°F)109 mm (4.3 inches)88%moderate
December Weather-8°C (17°F)170 mm (6.7 inches)90%low

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