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September Weather in Saint-Blaise, Switzerland

Last updated: August 27, 2025

In September, the average temperature in Saint-Blaise, Switzerland hovers around 14°C (58°F), with a minimum of 3°C (37°F) and a maximum reaching up to 28°C (82°F). During this time, expect about 83 mm (3.3 in) of precipitation spread over 12 days, contributing to an average humidity level of 81%.

September Temperature in Saint-Blaise

In September in Saint-Blaise, the average temperature is 14°C (58°F). The maximum can reach 28°C (82°F), and the minimum can be as low as 3°C (37°F). This climate makes it an ideal time for travelers to enjoy the outdoors while experiencing a comfortable range of temperatures.

September Weather in Saint-Blaise: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Saint-Blaise, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint-Blaise, September typically has an average temperature of 14°C (58°F), with highs reaching up to 28°C (82°F) and lows dropping to around 3°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec323641485463656458494035
Data source: Temperature data for Saint-Blaise 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 Saint-Blaise

In Saint-Blaise in September, the precipitation amount is 83 mm (3.3 in) distributed over the course of 12 days.

September Precipitation Trends in Saint-Blaise

The chart displays monthly precipitation patterns in Saint-Blaise, 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 Saint-Blaise, September typically receives around 83 mm (3.3 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec10987114651591351451308410890158
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Saint-Blaise

In Saint-Blaise in September, humidity is 81%. With an average temperature of 14°C (58°F), this humidity feels like a warm blanket wrapping around you, making outdoor adventures sticky and challenging, while also providing a lush, vibrant atmosphere perfect for exploring.

September Average Humidity in Saint-Blaise

This chart illustrates the average monthly humidity levels in Saint-Blaise, 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 Saint-Blaise 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 Saint-Blaise

In Saint-Blaise 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 Saint-Blaise, you can refer to this Hourly UV Index in Saint-Blaise.

Maximum UV Index Levels in Saint-Blaise for September

The chart shows the monthly maximum UV Index (UVI) for Saint-Blaise 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 Saint-Blaise typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689986421
Data source: Saint-Blaise 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 Saint-Blaise Compares to Other Months

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

This table compares monthly weather conditions in Saint-Blaise, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)109 mm (4.3 inches)91%low
February Weather2°C (37°F)87 mm (3.4 inches)89%moderate
March Weather5°C (41°F)114 mm (4.5 inches)87%moderate
April Weather9°C (48°F)65 mm (2.6 inches)84%high
May Weather12°C (54°F)159 mm (6.3 inches)80%very high
June Weather17°C (63°F)135 mm (5.3 inches)82%very high
July Weather18°C (66°F)145 mm (5.7 inches)82%very high
August Weather18°C (65°F)130 mm (5.1 inches)77%very high
September Weather14°C (58°F)83 mm (3.3 inches)81%high
October Weather10°C (50°F)108 mm (4.3 inches)89%moderate
November Weather4°C (40°F)90 mm (3.5 inches)89%low
December Weather2°C (35°F)158 mm (6.2 inches)91%low

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