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September Weather in Brusio, Switzerland

Last updated: August 27, 2025

In September, the average temperature in Brusio, Switzerland hovers around 10°C (50°F), with minimums dipping to -7°C (19°F) and maximums peaking at 21°C (70°F). This period experiences about 115 mm (4.5 in) of precipitation across 15 days, contributing to an average humidity level of 83%. Prepare for a mix of cool temperatures and occasional rainfall!

September Temperature in Brusio

In September in Brusio, the average temperature is 10°C (50°F). The maximum can reach 21°C (70°F), and the minimum can be as low as -7°C (19°F). This wide temperature range suggests that travelers should be prepared for varying weather conditions, making it essential to pack layers for a comfortable visit.

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

The chart illustrates September temperature patterns in Brusio, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Brusio, September typically has an average temperature of 10°C (50°F), with highs reaching up to 21°C (70°F) and lows dropping to around -7°C (19°F).
JanFebMarAprMayJunJulAugSepOctNovDec162430374555575750423120
Data source: Temperature data for Brusio 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 Brusio

In Brusio in September, the total precipitation amount is 115 mm (4.5 in) over a span of 15 days.

September Precipitation Trends in Brusio

The chart displays monthly precipitation patterns in Brusio, 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 Brusio, September typically receives around 115 mm (4.5 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec475182103147129122140115144137110
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Brusio

In Brusio in September, humidity is 83%. With an average temperature of 10°C (50°F), this humidity feels like a damp chill that clings to your skin, making outdoor exploration less comfortable and prompting visitors to seek cozy indoor activities.

September Average Humidity in Brusio

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

In Brusio in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Brusio.

Maximum UV Index Levels in Brusio for September

The chart shows the monthly maximum UV Index (UVI) for Brusio 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 Brusio typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec347810111198632
Data source: Brusio 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 Brusio Compares to Other Months

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

This table compares monthly weather conditions in Brusio, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-9°C (17°F)47 mm (1.8 inches)92%moderate
February Weather-5°C (24°F)50 mm (2.0 inches)89%moderate
March Weather-1°C (30°F)82 mm (3.2 inches)87%high
April Weather3°C (37°F)103 mm (4.0 inches)84%very high
May Weather7°C (45°F)147 mm (5.8 inches)80%very high
June Weather13°C (55°F)129 mm (5.1 inches)82%extreme
July Weather14°C (57°F)122 mm (4.8 inches)83%extreme
August Weather14°C (57°F)140 mm (5.5 inches)80%very high
September Weather10°C (50°F)115 mm (4.5 inches)83%very high
October Weather6°C (42°F)144 mm (5.7 inches)90%high
November Weather-1°C (31°F)137 mm (5.4 inches)88%moderate
December Weather-7°C (20°F)110 mm (4.3 inches)90%low

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