January Weather in Arth, Switzerland

Last updated: August 27, 2025

In Arth, Switzerland, the average temperature in January hovers around -1°C (30°F). Temperatures can dip as low as -15°C (5°F), while reaching a maximum of 11°C (52°F). This month also sees 144 mm (5.7 in) of precipitation spread over 13 days, contributing to an average humidity of a notable 92%.

January Temperature in Arth

In January in Arth, the average temperature is -1°C (30°F). Maximums can reach 11°C (52°F), while minimums can drop as low as -15°C (5°F). This range of temperatures makes it advisable to pack warm clothing and be prepared for chilly conditions during your travels.

January Weather in Arth: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Arth, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Arth, January typically has an average temperature of -1°C (30°F), with highs reaching up to 11°C (52°F) and lows dropping to around -15°C (5°F).

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

January Precipitation in Arth

In Arth in January, the precipitation amount is 144 mm (5.7 in) spread over 13 days.

January Precipitation Trends in Arth

The chart displays monthly precipitation patterns in Arth, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Arth, January typically receives around 144 mm (5.7 inches) of precipitation spread over approximately 13 days.

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

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Millimeters (mm) Inches (in)

January Humidity in Arth

In Arth in January humidity is 92%. With an average temperature of -1°C (30°F), this humidity feels like an icy blanket wrapping around you, making outdoor activities challenging and requiring extra layers to stay warm and dry while traveling.

January Average Humidity in Arth

This chart illustrates the average monthly humidity levels in Arth, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Arth is approximately 92%, offering insight into how humid the weather typically is during this month.

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

January UV Index in Arth

In Arth in January, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Arth, you can visit Hourly UV Index in Arth.

Maximum UV Index Levels in Arth for January

The chart shows the monthly maximum UV Index (UVI) for Arth in January, 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 January, the maximum UV index in Arth typically reaches 2, which falls under the low exposure category.

Data source: Arth January 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 January Weather in Arth Compares to Other Months

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

This table compares monthly weather conditions in Arth, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-1°C (30°F)	144 mm (5.7 inches)	92%	low
February Weather	1°C (34°F)	106 mm (4.2 inches)	89%	moderate
March Weather	3°C (38°F)	127 mm (5.0 inches)	87%	moderate
April Weather	7°C (45°F)	104 mm (4.1 inches)	84%	high
May Weather	10°C (51°F)	163 mm (6.4 inches)	80%	very high
June Weather	16°C (60°F)	189 mm (7.4 inches)	82%	very high
July Weather	17°C (63°F)	190 mm (7.5 inches)	83%	very high
August Weather	17°C (63°F)	203 mm (8.0 inches)	80%	very high
September Weather	13°C (56°F)	146 mm (5.8 inches)	83%	high
October Weather	9°C (49°F)	165 mm (6.5 inches)	90%	moderate
November Weather	4°C (39°F)	102 mm (4.0 inches)	88%	moderate
December Weather	1°C (33°F)	171 mm (6.7 inches)	90%	low