January Weather in Jaun, Switzerland

Last updated: August 27, 2025

In January, the average temperature in Jaun, Switzerland hovers around -5°C (24°F), with extremes ranging from a chilly -24°C (-10°F) to a mild 8°C (47°F). Expect 150 mm (5.9 in) of precipitation over approximately 12 days, while the average humidity remains high at 91%, creating a crisp and damp atmosphere.

January Temperature in Jaun

In January in Jaun, the average temperature is -5°C (24°F). Maximums can reach 8°C (47°F), while minimums can drop to as low as -24°C (-10°F). Travelers should be prepared for cold weather and pack accordingly to stay warm during their visit.

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

The chart illustrates January temperature patterns in Jaun, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Jaun, January typically has an average temperature of -5°C (24°F), with highs reaching up to 8°C (47°F) and lows dropping to around -24°C (-10°F).

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

January Precipitation in Jaun

In Jaun in January, the total precipitation amount is 150 mm (5.9 in) over the course of 12 days.

January Precipitation Trends in Jaun

The chart displays monthly precipitation patterns in Jaun, 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 Jaun, January typically receives around 150 mm (5.9 inches) of precipitation spread over approximately 12 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 Jaun

In Jaun in January humidity is 91%. With an average temperature of -5°C (24°F), this humidity makes the cold feel even more biting and penetrative, creating a chilling atmosphere that's quite uncomfortable for traveling.

January Average Humidity in Jaun

This chart illustrates the average monthly humidity levels in Jaun, 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 Jaun is approximately 91%, 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 Jaun

In Jaun 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 Jaun, you can visit Hourly UV Index in Jaun.

Maximum UV Index Levels in Jaun for January

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

Data source: Jaun 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 Jaun Compares to Other Months

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

This table compares monthly weather conditions in Jaun, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-5°C (24°F)	150 mm (5.9 inches)	91%	low
February Weather	-1°C (30°F)	117 mm (4.6 inches)	89%	moderate
March Weather	1°C (34°F)	149 mm (5.9 inches)	87%	high
April Weather	5°C (41°F)	89 mm (3.5 inches)	84%	very high
May Weather	9°C (48°F)	205 mm (8.1 inches)	80%	very high
June Weather	14°C (57°F)	181 mm (7.1 inches)	82%	very high
July Weather	15°C (60°F)	200 mm (7.9 inches)	82%	very high
August Weather	15°C (59°F)	180 mm (7.1 inches)	77%	very high
September Weather	11°C (52°F)	117 mm (4.6 inches)	81%	high
October Weather	7°C (44°F)	135 mm (5.3 inches)	89%	moderate
November Weather	1°C (34°F)	109 mm (4.3 inches)	89%	moderate
December Weather	-3°C (26°F)	226 mm (8.9 inches)	91%	low