September Weather in Flums, Switzerland

Last updated: August 27, 2025

In September, the average temperature in Flums, Switzerland hovers around 10°C (51°F), grappling with a minimum of -5°C (24°F) and a peak of 23°C (73°F). Expect 195 mm (7.7 in) of precipitation spread over 18 days, contributing to an average humidity of 83%. Stay prepared for varying weather as you enjoy your time in this unique locale!

September Temperature in Flums

In September in Flums, the average temperature is 10°C (51°F). The maximum can reach 23°C (73°F), while the minimum can be as low as -5°C (24°F). It's advisable to pack layers to comfortably enjoy a range of weather conditions while exploring Flums.

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

The chart illustrates September temperature patterns in Flums, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Flums, September typically has an average temperature of 10°C (51°F), with highs reaching up to 23°C (73°F) and lows dropping to around -5°C (24°F).

Data source: Temperature data for Flums generated using information from the Copernicus Climate Change Service.

September Precipitation in Flums

In Flums in September, the precipitation amount reaches 195 mm (7.7 in) over a span of 18 days.

September Precipitation Trends in Flums

The chart displays monthly precipitation patterns in Flums, 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 Flums, September typically receives around 195 mm (7.7 inches) of precipitation spread over approximately 18 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Flums

In Flums in September, humidity is 83%. With an average temperature of 10°C (51°F), this humidity feels like a chilly dampness that permeates your clothes, making it essential to dress in layers for travel, as the cool air combined with the high humidity can create an uncomfortable and bone-chilling atmosphere.

September Average Humidity in Flums

This chart illustrates the average monthly humidity levels in Flums, 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 Flums is approximately 83%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Flums

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

Maximum UV Index Levels in Flums for September

The chart shows the monthly maximum UV Index (UVI) for Flums 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 Flums typically reaches 6, which falls under the high exposure category.

Data source: Flums 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 Flums Compares to Other Months

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

This table compares monthly weather conditions in Flums, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-5°C (24°F)	159 mm (6.3 inches)	92%	low
February Weather	-2°C (28°F)	108 mm (4.2 inches)	89%	moderate
March Weather	0°C (33°F)	146 mm (5.8 inches)	87%	high
April Weather	4°C (40°F)	125 mm (4.9 inches)	84%	high
May Weather	8°C (47°F)	217 mm (8.5 inches)	80%	very high
June Weather	13°C (56°F)	230 mm (9.1 inches)	82%	very high
July Weather	14°C (57°F)	280 mm (11.0 inches)	83%	very high
August Weather	14°C (57°F)	302 mm (11.9 inches)	80%	very high
September Weather	10°C (51°F)	195 mm (7.7 inches)	83%	high
October Weather	6°C (44°F)	165 mm (6.5 inches)	90%	moderate
November Weather	1°C (35°F)	103 mm (4.1 inches)	88%	moderate
December Weather	-3°C (26°F)	189 mm (7.4 inches)	90%	low