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September Weather in Hinterrhein, Switzerland

Last updated: August 27, 2025

In Hinterrhein, Switzerland, the average temperature in September hovers around 8°C (47°F), with temperatures ranging from a chilly -11°C (12°F) to a pleasant 20°C (68°F). Expect 129 mm (5.1 in) of precipitation over approximately 14 days, contributing to an average humidity of 83%.

September Temperature in Hinterrhein

In September in Hinterrhein, the average temperature is 8°C (47°F). Maximum temperatures can reach 20°C (68°F), while minimum temperatures can drop as low as -11°C (12°F). It's advisable to pack layers for your travels, as the temperatures can vary significantly throughout the day.

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

The chart illustrates September temperature patterns in Hinterrhein, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hinterrhein, September typically has an average temperature of 8°C (47°F), with highs reaching up to 20°C (68°F) and lows dropping to around -11°C (12°F).
JanFebMarAprMayJunJulAugSepOctNovDec172327344152545447392820
Data source: Temperature data for Hinterrhein 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 Hinterrhein

In Hinterrhein in September, the precipitation amount is 129 mm (5.1 in) over the course of 14 days.

September Precipitation Trends in Hinterrhein

The chart displays monthly precipitation patterns in Hinterrhein, 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 Hinterrhein, September typically receives around 129 mm (5.1 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec805997117152166141198129176141135
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Hinterrhein

In Hinterrhein 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 Hinterrhein

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

In Hinterrhein 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 Hinterrhein.

Maximum UV Index Levels in Hinterrhein for September

The chart shows the monthly maximum UV Index (UVI) for Hinterrhein 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 Hinterrhein typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24689101097532
Data source: Hinterrhein 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 Hinterrhein Compares to Other Months

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

This table compares monthly weather conditions in Hinterrhein, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-8°C (17°F)80 mm (3.2 inches)92%low
February Weather-5°C (23°F)59 mm (2.3 inches)89%moderate
March Weather-3°C (27°F)97 mm (3.8 inches)87%high
April Weather1°C (34°F)117 mm (4.6 inches)84%very high
May Weather5°C (42°F)152 mm (6.0 inches)80%very high
June Weather11°C (52°F)166 mm (6.5 inches)82%very high
July Weather12°C (55°F)141 mm (5.6 inches)83%very high
August Weather12°C (54°F)198 mm (7.8 inches)80%very high
September Weather8°C (47°F)129 mm (5.1 inches)83%high
October Weather4°C (39°F)176 mm (6.9 inches)90%moderate
November Weather-2°C (28°F)141 mm (5.6 inches)88%moderate
December Weather-7°C (20°F)135 mm (5.3 inches)90%low

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