January Weather in Sion, Canada

Last updated: June 18, 2025

In January, the average temperature in Sion, Canada hovers around -5°C (24°F), with the potential for a chilling minimum of -28°C (-18°F) and a milder maximum of 5°C (42°F). Visitors can expect 74 mm (2.9 in) of precipitation spread across 14 days, contributing to a notably high average humidity of 90%. Be prepared for a wintery experience!

January Temperature in Sion

In January in Sion, the average temperature is -5°C (24°F). The maximum can reach 5°C (42°F), while the minimum can drop as low as -28°C (-18°F). It’s important to pack appropriately for the extreme cold if you plan to travel during this time.

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

The chart illustrates January temperature patterns in Sion, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sion, January typically has an average temperature of -5°C (24°F), with highs reaching up to 5°C (42°F) and lows dropping to around -28°C (-18°F).

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

January Precipitation in Sion

In Sion in January, the precipitation amount is 74 mm (2.9 in) over a span of 14 days.

January Precipitation Trends in Sion

The chart displays monthly precipitation patterns in Sion, 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 Sion, January typically receives around 74 mm (2.9 inches) of precipitation spread over approximately 14 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 Sion

In Sion in January, humidity is 90%. With an average temperature of -5°C (24°F), this humidity feels like an icy mist wrapping around you, making every breath feel heavy and damp, while the cold sharpens the chill in the air, turning your travel experience into a battle against the harsh elements.

January Average Humidity in Sion

This chart illustrates the average monthly humidity levels in Sion, 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 Sion is approximately 90%, 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 Sion

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

Maximum UV Index Levels in Sion for January

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

Data source: Sion 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 Sion Compares to Other Months

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

This table compares monthly weather conditions in Sion, 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)	74 mm (2.9 inches)	90%	low
February Weather	-5°C (24°F)	59 mm (2.3 inches)	91%	moderate
March Weather	1°C (34°F)	68 mm (2.7 inches)	89%	moderate
April Weather	5°C (42°F)	69 mm (2.7 inches)	85%	high
May Weather	12°C (53°F)	66 mm (2.6 inches)	82%	very high
June Weather	16°C (61°F)	45 mm (1.8 inches)	81%	very high
July Weather	20°C (69°F)	13 mm (0.5 inches)	84%	very high
August Weather	20°C (68°F)	18 mm (0.7 inches)	75%	very high
September Weather	13°C (57°F)	45 mm (1.8 inches)	74%	high
October Weather	5°C (42°F)	59 mm (2.3 inches)	85%	moderate
November Weather	0°C (33°F)	71 mm (2.8 inches)	88%	low
December Weather	-4°C (26°F)	72 mm (2.8 inches)	93%	low