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
December's arrival registers an average high-temperature of a fresh 11.1°C (52°F), closely aligning with the temperature of the previous month. Challans sees a minor drop to an average minimum temperature of 7.9°C (46.2°F) during the night in the month of December.Humidity
The months with the highest humidity are January and December, with an average relative humidity of 81%.Rainfall
In Challans, in December, during 17 rainfall days, 74mm (2.91") of precipitation is typically accumulated. In Challans, during the entire year, the rain falls for 176.3 days and collects up to 575mm (22.64") of precipitation.Snowfall
The only month with snowfall in Challans is December. The month with the most snowfall in Challans is December, when snow falls for 0.2 days and typically aggregates up to 1mm (0.04") of snow.Daylight
The month with the shortest days in Challans is December, with an average of 8h and 36min of daylight.On the first day of December in Challans, sunrise is at 08:32 and sunset at 17:21. On the last day of the month, sunrise is at 08:52 and sunset at 17:28 CET.
Sunshine
January and December, with an average of 4.6h of sunshine, are months with the least sunshine.UV index
The months with the lowest UV index in Challans are January through April, November and December, with an average maximum UV index of 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: The maximum UV index of 3 during December translates into these guidelines:
Be vigilant - Preventing sunburn is recommended. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are December temperatures in Challans?
What is the most humid month in Challans?
What is the average humidity in December in Challans?
How many days does it rain in December in Challans?
When does it snow the most in Challans?
When does it start snowing in Challans?
What is the month with the shortest days in Challans?
How many hours of daylight does Challans have in December?
When is the sunrise / sunset in December in Challans?
What are the months with the least sunshine in Challans?
How many hours of sunshine does Challans have in December?
When is the lowest UV index in Challans?
What is the UV index intensity in December in Challans?
Average temperature in December
Challans, France
- Average high temperature in December: 11.1°C
The warmest month (with the highest average high temperature) is July (22.2°C).
The months with the lowest average high temperature are January and February (9.9°C).
- Average low temperature in December: 7.9°C
The month with the highest average low temperature is August (16.8°C).
The coldest month (with the lowest average low temperature) is February (5.8°C).
Average pressure in December
Challans, France
- Average pressure in December: 1019.6mbar
The month with the highest atmospheric pressure is December (1019.6mbar).
The month with the lowest atmospheric pressure is November (1013.8mbar).
Average wind speed in December
Challans, France
- Average wind speed in December: 24.2km/h
The windiest month (with the highest average wind speed) is December (24.2km/h).
The calmest month (with the lowest average wind speed) is August (15.8km/h).
Average humidity in December
Challans, France
- Average humidity in December: 81%
The months with the highest relative humidity are January and December (81%).
The month with the lowest relative humidity is September (73%).
Average rainfall in December
Challans, France
- Average rainfall in December: 74mm
The wettest month (with the highest rainfall) is November (83mm).
The driest month (with the least rainfall) is September (29mm).
Average rainfall days in December
Challans, France
- Average rainfall days in December: 17 days
The month with the highest number of rainy days is January (19.3 days).
The month with the least rainy days is September (10.4 days).
Average snowfall in December
Challans, France
- Average snowfall in December: 1mm
The month with the highest snowfall is December (1mm).
The months with the least snowfall are January, February, March, April, May, June, July, August, September, October and November (0mm).
Average snowfall days in December
Challans, France
- Average snowfall days in December: 0.2 days
The month with the highest number of snowfall days is February (0.3 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).
Average daylight in December /
Average sunshine in December
Challans, France
- Average daylight in December: 8h and 4min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in December: 4h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The months with the least sunshine are January and December (Average sunshine: 4h and 36min).
Average sunshine days in December
Challans, France
- Average sunshine days in December: 11.1 days
The month with the most sunshine days is September (17.7 days).
The month with the least sunshine days is January (9.2 days).
Average UV index in December
Challans, France
- Average UV index in December: 3
The months with the highest UV index are May, June, July, August and September (UV index 5).
The months with the lowest UV index are January, February, March, April, November and December (UV index 3).
Average cloud cover in December
Challans, France
- Average cloud cover in December: 52
The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is September (Cloud cover 31).
Average visibility in December
Challans, France
- Average visibility in December: 10km
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (10km).
The month with the lowest visibility is January (9km).
