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Switzerland
The weather in December in Sion
Looking for sun? December isn’t a good month to be in Sion. There’s too much chance of rain this month.
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in December for Sion, Switzerland. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Daily weather in December for Sion
Click on any day in December to get detailed info about the usual weather on that day in Sion. Check out the historical temperatures and precipitation over the past 10 years on this day.
Average temperatures
It's cold in December in Sion with an average temperature of 5°C. Temperatures this month range from a low of 3°C to a high of 7°C. At night, you can expect temperatures between -3°C and 1°C.
Temperature records
With 12°C in 2019, Sion reached the highest temperature in December over the past 10 years. The lowest daytime temperature in this month was -5°C in 2014. The extreme nighttime temperatures ranged from a lowest recorded value of -13°C to a highest value of 9°C.
Precipitation and snowfall
In December, there is an average of 203 mm of precipitation, spread over 20 days. Of the total precipitation, about 54 cm falls as snow in December. The wind speed is around 2 Bft, mostly coming from the Southeast.
December weather comparison
| Sion | New York | |
|---|---|---|
| Average temperature | 5°C | 9°C |
| Max. temperature | 7°C | 12°C |
| Min. temperature | -3°C | -5°C |
| Total precipitation | 203 mm | 133 mm |
| Rainy days | 20 days | 17 days |
| Total snowfall | 54 cm | 9,7 cm |
| Snowy days | 19 days | 3 days |
Start of December
The month of December starts in Sion with cold temps, averaging around 5°C during the day and nights around -1°C.
Mid December
By mid-December, daytime temps rise to around 6°C, with nights around -1°C. There’s a high chance of precipitation during this time.
End of December
By the end of December, the average daytime temperature in Sion is around 6°C, while nighttime temps are about 0°C. Expect regular precipitation, but if you’re lucky, you’ll also get some dry and sunny days.
UV index
The UV index is a maximum of 4 this month. That's a moderate value on the intensity scale of 1 to 11. Unprotected skin can burn in about 30 minutes.
Check out the climate of Sion for all months and discover the best travel time
Curious about the weather in other parts of Switzerland? Check out the climate and weather for spots like Zurich, Geneva, Valais, or explore other destinations in Switzerland.
Temperature charts
These charts show the average temperatures in December in Sion, Switzerland. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in December in Sion
Temperature in December in Sion over the years
Precipitation charts
These charts show the average amount of precipitation in December in Sion, Switzerland. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in December in Sion
Total precipitation in December in Sion over the years
Daily Snowfall in December in Sion
Snowfall in December in Sion per year
Daily UV index in December in Sion
This chart shows the average daily UV index in December in Sion, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Weather experiences in December in Sion
Have you been to Sion in December?
Share your weather experience in December in Sion.
Average weather in Sion by month
Click on a month below to see detailed weather info for Sion. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.