December weather forecast
Seyssins, France

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Weather in December

December, the first month of the winter in Seyssins, is still a cold month, with an average temperature ranging between max 4°C (39.2°F) and min -2.3°C (27.9°F).

Temperature

The shift from November to December includes a minor decrease in the average high-temperature, lightly dropping from a chilly 7.7°C (45.9°F) to a cold 4°C (39.2°F). Seyssins's nighttime temperature in December falls to an average of -2.3°C (27.9°F).

Humidity

The average relative humidity in December is 84%.

Rainfall

The month with the most rainfall in Seyssins is December, when the rain falls for 13.7 days and typically aggregates up to 126mm (4.96") of precipitation.

Snowfall

January through May, October through December are months with snowfall. In Seyssins, during December, snow falls for 5.5 days and regularly aggregates up to 127mm (5") of snow. In Seyssins, France, during the entire year, snow falls for 29.7 days and aggregates up to 532mm (20.94") of snow.

Daylight

The month with the shortest days is December, with an average of 8h and 48min of daylight.
On the first day of the month, sunrise is at 07:56 and sunset at 16:56. On the last day of December, sunrise is at 08:15 and sunset at 17:04 CET.

Sunshine

January and December, with an average of 5.3h of sunshine, are months with the least sunshine.

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for the average person.
Note: In December, the maximum UV index of 2 transforms into these recommendations:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.

Frequently asked questions

How cold is it in December?

The average high-temperature and low-temperature during December are 4°C (39.2°F) and -2.3°C (27.9°F) respectively.

What is the average humidity in December?

The average relative humidity in December is 84%.

What is the wettest month?

December is the month with the most rainfall. Rain falls for 13.7 days and accumulates 126mm (4.96") of precipitation.

How many days does it rain in December?

In Seyssins, in December, it is raining for 13.7 days, with typically 126mm (4.96") of accumulated precipitation.

How much does it snow in December?

In Seyssins, in December, snow falls for 5.5 days, with typically accumulated 127mm (5") of snow.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 8h and 48min of daylight.

How many hours of daylight does Seyssins have in December?

In Seyssins, the average day length in December is 8h and 49min.

What time are sunrise and sunset in December in Seyssins?

In December, on the first day of the month, sunrise is at 07:56 and sunset at 16:56. On the last day of the month, sunrise is at 08:15 and sunset at 17:04 CET.

What are the months with the least sunshine?

January and December, with an average of 5.3h of sunshine, are months with the least sunshine.

How long on average sun shines in December?

The average sunshine duration in December in Seyssins is 5.3h.

What is the month with the lowest UV index?

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.

How high is the UV index in December?

In December, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Seyssins, France

Average temperature in December - Seyssins, France
  • Average high temperature in December: 4°C

The warmest month (with the highest average high temperature) is July (21.7°C).
The month with the lowest average high temperature is January (2.4°C).

  • Average low temperature in December: -2.3°C

The month with the highest average low temperature is July (10.9°C).
The coldest month (with the lowest average low temperature) is February (-4.3°C).

Average pressure in December
Seyssins, France

Average pressure in December - Seyssins, France
  • Average pressure in December: 1020.7mbar

The month with the highest atmospheric pressure is December (1020.7mbar).
The month with the lowest atmospheric pressure is April (1015mbar).

Average wind speed in December
Seyssins, France

Average wind speed in December - Seyssins, France
  • Average wind speed in December: 8.8km/h

The windiest month (with the highest average wind speed) is February (9.3km/h).
The calmest month (with the lowest average wind speed) is September (7.1km/h).

Average humidity in December
Seyssins, France

Average humidity in December - Seyssins, France
  • Average humidity in December: 84%

The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is August (75%).

Average rainfall in December
Seyssins, France

Average rainfall in December - Seyssins, France
  • Average rainfall in December: 126mm

The wettest month (with the highest rainfall) is December (126mm).
The driest month (with the least rainfall) is September (46mm).

Average rainfall days in December
Seyssins, France

Average rainfall days in December - Seyssins, France
  • Average rainfall days in December: 13.7 days

The month with the highest number of rainy days is May (21.4 days).
The month with the least rainy days is October (11.9 days).

Average snowfall in December
Seyssins, France

Average snowfall in December - Seyssins, France
  • Average snowfall in December: 127mm

The month with the highest snowfall is February (149mm).
The months with the least snowfall are June, July, August and September (0mm).

Average snowfall days in December
Seyssins, France

Average snowfall days in December - Seyssins, France
  • Average snowfall days in December: 5.5 days

The month with the highest number of snowfall days is February (8.4 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Seyssins, France

Average daylight in December / Average sunshine in December - Seyssins, France
  • Average daylight in December: 8h and 5min

The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).

  • Average sunshine in December: 5h and 2min

The months with the most sunshine are July and August (Average sunshine: 10h and 48min).
The months with the least sunshine are January and December (Average sunshine: 5h and 18min).

Average sunshine days in December
Seyssins, France

Average sunshine days in December - Seyssins, France
  • Average sunshine days in December: 14.1 days

The month with the most sunshine days is October (17.2 days).
The month with the least sunshine days is May (7.1 days).

Average UV index in December
Seyssins, France

Average UV index in December - Seyssins, France
  • Average UV index in December: 2

The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in December
Seyssins, France

Average cloud cover in December - Seyssins, France
  • Average cloud cover in December: 43

The month with the most cloud cover is February (Cloud cover 46).
The month with the least cloud cover is August (Cloud cover 27).

Average visibility in December
Seyssins, France

Average visibility in December - Seyssins, France
  • Average visibility in December: 8km

The month with the highest visibility is August (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, September, October, November and December (8km).

Seyssins, France

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