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
December
Weather in December
Temperature
The arrival of December corresponds with a light shift in temperature, down from 5.9°C (42.6°F) in November to a still icy 2°C (35.6°F). During the nights in December, Port-Valais experiences a consistent average temperature of -4.7°C (23.5°F).Humidity
The average relative humidity in December is 83%.Rainfall
In Port-Valais, in December, during 15.8 rainfall days, 131mm (5.16") of precipitation is typically accumulated. Throughout the year, in Port-Valais, there are 215.6 rainfall days, and 1219mm (47.99") of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall in Port-Valais. In Port-Valais, in December, during 5.8 snowfall days, 114mm (4.49") of snow is typically accumulated. Throughout the year, in Port-Valais, there are 31.1 snowfall days, and 561mm (22.09") of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 8h and 42min of daylight.On the first day of December in Port-Valais, sunrise is at 07:55 and sunset at 16:47. On the last day of the month, sunrise is at 08:15 and sunset at 16:55 CET.
Sunshine
January and December, with an average of 5.5h of sunshine, are months with the least sunshine.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to UV radiation for average individuals.Note: The maximum daily UV index of 2 in December interprets into the following recommendations:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Port-Valais in December?
What is the average humidity in December in Port-Valais?
How many days does it rain in December in Port-Valais?
How much does it snow in Port-Valais in December?
What is the month with the shortest days in Port-Valais?
What is the average length of the day in December in Port-Valais?
What time are sunrise and sunset in December in Port-Valais?
What is the month with the least sunshine in Port-Valais?
How long on average sun shines in December in Port-Valais?
What are the months with the lowest UV index in Port-Valais?
What is the UV index intensity in December in Port-Valais?
Average temperature in December
Port-Valais, Switzerland
- Average high temperature in December: 2°C
The warmest months (with the highest average high temperature) are July and August (19.8°C).
The month with the lowest average high temperature is January (0.6°C).
- Average low temperature in December: -4.7°C
The month with the highest average low temperature is July (9.3°C).
The coldest month (with the lowest average low temperature) is February (-7.1°C).
Average pressure in December
Port-Valais, Switzerland
- Average pressure in December: 1021.1mbar
The month with the highest atmospheric pressure is December (1021.1mbar).
The month with the lowest atmospheric pressure is April (1015.3mbar).
Average wind speed in December
Port-Valais, Switzerland
- Average wind speed in December: 9.2km/h
The windiest month (with the highest average wind speed) is December (9.2km/h).
The calmest month (with the lowest average wind speed) is August (6.5km/h).
Average humidity in December
Port-Valais, Switzerland
- Average humidity in December: 83%
The month with the highest relative humidity is February (87%).
The month with the lowest relative humidity is August (77%).
Average rainfall in December
Port-Valais, Switzerland
- Average rainfall in December: 131mm
The wettest month (with the highest rainfall) is May (144mm).
The driest month (with the least rainfall) is September (54mm).
Average rainfall days in December
Port-Valais, Switzerland
- Average rainfall days in December: 15.8 days
The month with the highest number of rainy days is May (23.5 days).
The month with the least rainy days is October (13.3 days).
Average snowfall in December
Port-Valais, Switzerland
- Average snowfall in December: 114mm
The month with the highest snowfall is January (148mm).
The months with the least snowfall are June, July and August (0mm).
Average snowfall days in December
Port-Valais, Switzerland
- Average snowfall days in December: 5.8 days
The month with the highest number of snowfall days is February (8.6 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Port-Valais, 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 3min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The months with the least sunshine are January and December (Average sunshine: 5h and 30min).
Average sunshine days in December
Port-Valais, Switzerland
- Average sunshine days in December: 12.6 days
The month with the most sunshine days is October (15 days).
The month with the least sunshine days is May (4.3 days).
Average UV index in December
Port-Valais, Switzerland
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 4).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in December
Port-Valais, Switzerland
- Average cloud cover in December: 42
The months with the most cloud cover are January, February, March, May and December (Cloud cover 42).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in December
Port-Valais, Switzerland
- Average visibility in December: 8km
The months with the highest visibility are October and November (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September and December (8km).
