December weather forecastL'Islet, Guernsey

December

Weather in December

December solidifies winter's grip with temperatures hovering between 9.2°C (48.6°F) and 11.1°C (52°F) and a typical 8.3 hours of daylight in L'Islet, Guernsey. The season's character is further defined with long nights and the year's heaviest rainfall, peaking at 59mm (2.32"). Winds intensify, reaching their maximum normal strength of the year at 36km/h (22.4mph). Despite the shortened daylight hours and increased wind speeds, December retains a certain charm, marked by holiday lights and festivities, casting a warmth in the midst of winter's chill.

Temperature

As L'Islet welcomes December, the average high-temperature stabilizes at a cool 11.1°C (52°F), showing little deviation from November's 13.2°C (55.8°F). L'Islet, during December nights, experiences a subtle shift to a low average of 9.2°C (48.6°F) from the day's heat.

Humidity

November and December, with an average relative humidity of 77%, are the least humid months in L'Islet, Guernsey.

Rainfall

In L'Islet, during December, the rain falls for 20.5 days and regularly aggregates up to 59mm (2.32") of precipitation. Throughout the year, there are 195.6 rainfall days, and 554mm (21.81") of precipitation is accumulated.

Snowfall

February through December are months without snowfall.

Daylight

With an average of 8h and 12min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 07:45 and sunset at 16:13. On the last day of December, sunrise is at 08:06 and sunset at 16:20 GMT.

Sunshine

With an average of 3.8h of sunshine, December has the least sunshine of the year in L'Islet.

UV index

The average daily maximum UV index in December is 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the average person.
Note: The daily high UV index of 3 during December translates into the following recommendations:
Be vigilant - Preventing sunburn is recommended. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.

Updated: Feb 9, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

During December, L'Islet experiences an average high-temperature of 11.1°C (52°F) and a low-temperature of 9.2°C (48.6°F).

November and December, with an average relative humidity of 77%, are the least humid months.

In L'Islet, the average relative humidity in December is 77%.

In L'Islet, in December, it is raining for 20.5 days, with typically 59mm (2.32") of accumulated precipitation.

In L'Islet, snow does not fall in February through December.

In L'Islet, in December, it doesn't snow. In January, it regularly snows.

December has the shortest days of the year in L'Islet, with an average of 8h and 12min of daylight.

In December, the average day length is 8h and 14min.

In December, on the first day of the month, sunrise is at 07:45 and sunset at 16:13. On the last day of the month, in L'Islet, Guernsey, sunrise is at 08:06 and sunset at 16:20 GMT.

With an average of 3.8h of sunshine, December has the least sunshine of the year.

The average sunshine duration in December in L'Islet, Guernsey, is 3.8h.

The average daily maximum UV index in December in L'Islet, Guernsey, is 3. A UV Index reading of 3 to 5 represents a moderate vulnerability from unprotected exposure to UV radiation.

Today

Tomorrow

Long-term

Year J F M A M J J A S O N December

Nov

December

Jan

Average high temperature

13.2°C

11.1°C

9.8°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

37km/h

37.9km/h

35.8km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

4.2

5.7

5.5

Average UV index

Average cloud cover

62%

Average visibility

10km

Average temperature in December
L'Islet, Guernsey

Average high temperature in December: 11.1°C

The warmest month (with the highest average high temperature) is August (17.8°C).
The month with the lowest average high temperature is February (9.2°C).

Average low temperature in December: 9.2°C

The month with the highest average low temperature is August (15.7°C).
The coldest month (with the lowest average low temperature) is February (6.9°C).

Average pressure in December
L'Islet, Guernsey

Average pressure in December: 1016.6mbar

The month with the highest atmospheric pressure is September (1017.9mbar).
The month with the lowest atmospheric pressure is November (1011.5mbar).

Average wind speed in December
L'Islet, Guernsey

Average wind speed in December: 36km/h

The windiest month (with the highest average wind speed) is December (36km/h).
The calmest month (with the lowest average wind speed) is July (21.9km/h).

Average humidity in December
L'Islet, Guernsey

Average humidity in December: 77%

The months with the highest relative humidity are June and July (84%).
The months with the lowest relative humidity are November and December (77%).

Average rainfall in December
L'Islet, Guernsey

Average rainfall in December: 59mm

The wettest month (with the highest rainfall) is November (78mm).
The driest month (with the least rainfall) is July (26mm).

Average rainfall days in December
L'Islet, Guernsey

Average rainfall days in December: 20.5 days

The month with the highest number of rainy days is November (22.5 days).
The month with the least rainy days is June (11.4 days).

Average snowfall in December
L'Islet, Guernsey

Average snowfall in December: 0mm

The month with the highest snowfall is January (2mm).
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0mm).

Average snowfall days in December
L'Islet, Guernsey

Average snowfall days in December: 0 days

The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).

Average daylight in December /
Average sunshine in December
L'Islet, Guernsey

Average daylight in December: 8h and 12min

The month with the longest days is June (Average daylight: 16h and 12min).
The month with the shortest days is December (Average daylight: 8h and 12min).

Average sunshine in December: 3h and 48min

The month with the most sunshine is July (Average sunshine: 9h and 30min).
The month with the least sunshine is December (Average sunshine: 3h and 48min).

Average sunshine days in December
L'Islet, Guernsey

Average sunshine days in December: 5.7 days

The month with the most sunshine days is May (16.3 days).
The month with the least sunshine days is November (4.2 days).

Average UV index in December
L'Islet, Guernsey

Average UV index in December: 3

The months with the highest UV index are July, August and September (UV index 5).
The month with the lowest UV index is February (UV index 2).

Average cloud cover in December
L'Islet, Guernsey

Average cloud cover in December: 62

The months with the most cloud cover are January, November and December (Cloud cover 62).
The month with the least cloud cover is July (Cloud cover 38).

Average visibility in December
L'Islet, Guernsey

Average visibility in December: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).