Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
Riddes's progression into December involves a minor drop in the average high-temperature, slightly receding from a wintry 2.9°C (37.2°F) in November to a freezing cold -0.8°C (30.6°F). During December, Riddes records a consistent average nighttime temperature of -9.1°C (15.6°F).Humidity
In December, the average relative humidity in Riddes is 85%.Rainfall
In Riddes, in December, during 12.7 rainfall days, 72mm (2.83") of precipitation is typically accumulated. In Riddes, during the entire year, the rain falls for 206.5 days and collects up to 851mm (33.5") of precipitation.Snowfall
January through May, September through December are months with snowfall in Riddes. In December, in Riddes, it is snowing for 5.9 days. Throughout December, 59mm (2.32") of snow is accumulated. In Riddes, Switzerland, during the entire year, snow falls for 35.6 days and aggregates up to 419mm (16.5") of snow.Daylight
December has the shortest days of the year in Riddes, with an average of 8h and 42min of daylight.On the first day of December, sunrise is at 07:53 and sunset at 16:47. On the last day of the month, sunrise is at 08:13 and sunset at 16:55 CET.
Sunshine
In Riddes, Switzerland, the average sunshine in December is 5.1h.UV index
The average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for the average person.Note: In December, the average maximum UV index of 2 translates into the following recommendations:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Frequently asked questions
How cold is it in Riddes in December?
What is the average humidity in December in Riddes?
How many days does it rain in December in Riddes?
How much does it snow in Riddes in December?
What is the month with the shortest days in Riddes?
How many hours of daylight does Riddes have in December?
What time are sunrise and sunset in December in Riddes?
How long on average sun shines in December in Riddes?
How high is the UV index in December in Riddes?
Average temperature in December
Riddes, Switzerland
- Average high temperature in December: -0.8°C
The warmest month (with the highest average high temperature) is August (17°C).
The month with the lowest average high temperature is January (-2.2°C).
- Average low temperature in December: -9.1°C
The months with the highest average low temperature are July and August (6.4°C).
The coldest month (with the lowest average low temperature) is February (-10.8°C).
Average pressure in December
Riddes, Switzerland
- Average pressure in December: 1021mbar
The month with the highest atmospheric pressure is December (1021mbar).
The month with the lowest atmospheric pressure is April (1015.2mbar).
Average wind speed in December
Riddes, Switzerland
- Average wind speed in December: 8.3km/h
The windiest month (with the highest average wind speed) is December (8.3km/h).
The calmest month (with the lowest average wind speed) is August (6.2km/h).
Average humidity in December
Riddes, Switzerland
- Average humidity in December: 85%
The month with the highest relative humidity is March (90%).
The months with the lowest relative humidity are July, August and October (79%).
Average rainfall in December
Riddes, Switzerland
- Average rainfall in December: 72mm
The wettest month (with the highest rainfall) is May (110mm).
The driest month (with the least rainfall) is September (45mm).
Average rainfall days in December
Riddes, Switzerland
- Average rainfall days in December: 12.7 days
The month with the highest number of rainy days is May (23.3 days).
The month with the least rainy days is January (11.8 days).
Average snowfall in December
Riddes, Switzerland
- Average snowfall in December: 59mm
The month with the highest snowfall is January (110mm).
The months with the least snowfall are June, July and August (0mm).
Average snowfall days in December
Riddes, Switzerland
- Average snowfall days in December: 5.9 days
The month with the highest number of snowfall days is January (8.8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Riddes, Switzerland
- Average daylight in December: 8h and 4min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in December: 5h and 1min
The months with the most sunshine are July and August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 5h and 0min).
Average sunshine days in December
Riddes, Switzerland
- Average sunshine days in December: 13.8 days
The month with the most sunshine days is October (15.3 days).
The month with the least sunshine days is May (4.7 days).
Average UV index in December
Riddes, Switzerland
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 4).
The months with the lowest UV index are January and March (UV index 1).
Average cloud cover in December
Riddes, Switzerland
- Average cloud cover in December: 46
The months with the most cloud cover are February and March (Cloud cover 51).
The month with the least cloud cover is October (Cloud cover 36).
Average visibility in December
Riddes, Switzerland
- Average visibility in December: 8km
The months with the highest visibility are June, July, August, October, November and December (8km).
The months with the lowest visibility are January, February, March, April, May and September (7km).
Riddes, Switzerland
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