September Weather in Horw, Switzerland

Last updated: August 27, 2025

In September, the average temperature in Horw, Switzerland hovers around 14°C (58°F), where the days can range from a chilly 3°C (37°F) to a warm 25°C (78°F). Precipitation levels average 138 mm (5.4 in) spread across 15 days, creating a lush environment. With an average humidity of 83%, the air is often thick and tropical, perfect for those who enjoy a rich atmosphere.

September Temperature in Horw

In September in Horw, the average temperature is 14°C (58°F). Maximum temperatures can reach 25°C (78°F), while minimums can drop as low as 3°C (37°F). This variety in temperatures makes it essential to pack layers for your travels, allowing you to stay comfortable throughout the day.

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

The chart illustrates September temperature patterns in Horw, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Horw, September typically has an average temperature of 14°C (58°F), with highs reaching up to 25°C (78°F) and lows dropping to around 3°C (37°F).

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

September Precipitation in Horw

In Horw in September, the total precipitation amount is 138 mm (5.4 in) recorded over the course of 15 days.

September Precipitation Trends in Horw

The chart displays monthly precipitation patterns in Horw, 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 Horw, September typically receives around 138 mm (5.4 inches) of precipitation spread over approximately 15 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 Horw

In Horw in September, humidity is 83%. With an average temperature of 14°C (58°F), this humidity feels like a thick blanket enveloping you, making exploration feel heavier and sweatier, so be prepared for a slower pace while traveling.

September Average Humidity in Horw

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

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

Maximum UV Index Levels in Horw for September

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

Data source: Horw 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 Horw Compares to Other Months

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

This table compares monthly weather conditions in Horw, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	0°C (32°F)	138 mm (5.4 inches)	92%	low
February Weather	2°C (36°F)	107 mm (4.2 inches)	89%	moderate
March Weather	4°C (40°F)	126 mm (5.0 inches)	87%	moderate
April Weather	8°C (46°F)	102 mm (4.0 inches)	84%	high
May Weather	11°C (52°F)	172 mm (6.8 inches)	80%	very high
June Weather	16°C (62°F)	202 mm (8.0 inches)	82%	very high
July Weather	18°C (64°F)	199 mm (7.8 inches)	83%	very high
August Weather	18°C (64°F)	193 mm (7.6 inches)	80%	very high
September Weather	14°C (58°F)	138 mm (5.4 inches)	83%	high
October Weather	10°C (50°F)	158 mm (6.2 inches)	90%	moderate
November Weather	5°C (41°F)	97 mm (3.8 inches)	88%	moderate
December Weather	2°C (35°F)	169 mm (6.6 inches)	90%	low