August Weather in Sion, Canada

Last updated: June 18, 2025

In August, the average temperature in Sion, Canada is a pleasant 20°C (68°F). However, be prepared for temperature fluctuations, as it can dip to a minimum of 4°C (39°F) and soar to a maximum of 37°C (98°F). During this month, you can expect a modest precipitation amount of 18 mm (0.7 in) over about 3 days, coupled with an average humidity level of 75%. Enjoy the weather, but don't forget to pack accordingly!

August Temperature in Sion

In August in Sion, the average temperature is 20°C (68°F). Maximums can reach 37°C (98°F), and minimums can be as low as 4°C (39°F). It's a great time to visit for those who enjoy mild weather and are prepared for a range of temperatures.

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

The chart illustrates August 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, August typically has an average temperature of 20°C (68°F), with highs reaching up to 37°C (98°F) and lows dropping to around 4°C (39°F).

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

August Precipitation in Sion

In Sion in August, the precipitation amount is 18 mm (0.7 in) over a span of 3 days.

August Precipitation Trends in Sion

The chart displays monthly precipitation patterns in Sion, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Sion, August typically receives around 18 mm (0.7 inches) of precipitation spread over approximately 3 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

August Humidity in Sion

In Sion in August, humidity is 75%. With an average temperature of 20°C (68°F), this humidity feels like a warm, muggy embrace that can leave travelers feeling sticky and exhausted.

August Average Humidity in Sion

This chart illustrates the average monthly humidity levels in Sion, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Sion is approximately 75%, offering insight into how humid the weather typically is during this month.

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

August UV Index in Sion

In Sion in August, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Sion.

Maximum UV Index Levels in Sion for August

The chart shows the monthly maximum UV Index (UVI) for Sion in August, 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 August, the maximum UV index in Sion typically reaches 8, which falls under the very high exposure category.

Data source: Sion August 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 August 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 August’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 August’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