December weather forecastKnockaderry, Ireland

December

Weather in December

The first month of the winter, December, is also a frosty month in Knockaderry, Ireland, with an average temperature varying between 8°C (46.4°F) and 3.5°C (38.3°F).

Temperature

December registers an average high-temperature of a still frosty 8°C (46.4°F), slightly varied from November's 9.6°C (49.3°F). December nights in Knockaderry reflect a consistent temperature dip to an icy 3.5°C (38.3°F), a slight descent from daytime peaks.

Humidity

The months with the highest humidity are November and December, with an average relative humidity of 90%.

Rainfall

December is the month with the most rainfall in Knockaderry. Rain falls for 16.1 days and accumulates 56mm (2.2") of precipitation.

Snowfall

Months with snowfall are January through March and December. The month with the most snowfall is December, when snow falls for 0.6 days and typically aggregates up to 21mm (0.83") of snow.

Daylight

With an average of 7h and 48min of daylight, December has the shortest days of the year in Knockaderry, Ireland.
On the first day of the month, sunrise is at 8:24 am and sunset at 4:25 pm. On the last day of December, sunrise is at 8:46 am and sunset at 4:31 pm GMT.

Sunshine

January and December, with an average of 4h of sunshine, are months with the least sunshine in Knockaderry.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Knockaderry. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for average individuals.
Note: In December, the maximum UV index of 2 transforms into these recommendations:
Most individuals face no major issues with lengthy exposure to the sun, but children, infants, and individuals with fair skin always require protection. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.

Updated: Jan 29, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

An average high-temperature, in December, in Knockaderry, is 8°C (46.4°F) and the average low-temperature is 3.5°C (38.3°F).

November and December, with an average relative humidity of 90%, are most humid months in Knockaderry, Ireland.

In Knockaderry, the average relative humidity in December is 90%.

December is the month with the most rainfall. Rain falls for 16.1 days and accumulates 56mm (2.2") of precipitation.

In Knockaderry, in December, during 16.1 rainfall days, 56mm (2.2") of precipitation is typically accumulated.

The month with the most snowfall in Knockaderry is December, when snow falls for 0.6 days and typically aggregates up to 21mm (0.83") of snow.

December is the first month it typically snows. Throughout December, in the average 0.6 snowfall days, it receives 21mm (0.83") of snow.

With an average of 7h and 48min of daylight, December has the shortest days of the year.

The average day length in December is 7h and 46min.

In December, on the first day of the month, sunrise is at 8:24 am and sunset at 4:25 pm. On the last day of the month, sunrise is at 8:46 am and sunset at 4:31 pm GMT.

January and December, with an average of 4h of sunshine, are months with the least sunshine in Knockaderry, Ireland.

The average sunshine duration in December in Knockaderry is 4h.

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Knockaderry.

In December, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a minimal health 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

9.6°C

8°C

7.8°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

18.3km/h

20.1km/h

19.9km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

11.5

12.6

11.3

Average UV index

Average cloud cover

Average visibility

Average temperature in December
Knockaderry, Ireland

Average high temperature in December: 8°C

The warmest month (with the highest average high temperature) is July (18°C).
The month with the lowest average high temperature is January (7.8°C).

Average low temperature in December: 3.5°C

The month with the highest average low temperature is July (11.1°C).
The coldest months (with the lowest average low temperature) are February and March (2.9°C).

Average pressure in December
Knockaderry, Ireland

Average pressure in December: 1011mbar

The month with the highest atmospheric pressure is May (1016mbar).
The month with the lowest atmospheric pressure is November (1008.3mbar).

Average wind speed in December
Knockaderry, Ireland

Average wind speed in December: 18.8km/h

The windiest month (with the highest average wind speed) is February (19km/h).
The calmest month (with the lowest average wind speed) is July (13.3km/h).

Average humidity in December
Knockaderry, Ireland

Average humidity in December: 90%

The months with the highest relative humidity are November and December (90%).
The month with the lowest relative humidity is April (84%).

Average rainfall in December
Knockaderry, Ireland

Average rainfall in December: 56mm

The wettest month (with the highest rainfall) is December (56mm).
The driest month (with the least rainfall) is September (33mm).

Average rainfall days in December
Knockaderry, Ireland

Average rainfall days in December: 16.1 days

The month with the highest number of rainy days is August (20.4 days).
The month with the least rainy days is February (14.8 days).

Average snowfall in December
Knockaderry, Ireland

Average snowfall in December: 21mm

The month with the highest snowfall is December (21mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).

Average snowfall days in December
Knockaderry, Ireland

Average snowfall days in December: 0.6 days

The month with the highest number of snowfall days is February (0.9 days).
The months with the least snowfall days are May, June, July, August, September, October and November (0 days).

Average daylight in December /
Average sunshine in December
Knockaderry, Ireland

Average daylight in December: 7h and 48min

The month with the longest days is June (Average daylight: 16h and 42min).
The month with the shortest days is December (Average daylight: 7h and 48min).

Average sunshine in December: 4h and 0min

The month with the most sunshine is June (Average sunshine: 7h and 18min).
The months with the least sunshine are January and December (Average sunshine: 4h and 0min).

Average sunshine days in December
Knockaderry, Ireland

Average sunshine days in December: 12.6 days

The month with the most sunshine days is December (12.6 days).
The month with the least sunshine days is July (7.6 days).

Average UV index in December
Knockaderry, Ireland

Average UV index in December: 2

The months with the highest UV index are May and June (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
Knockaderry, Ireland

Average cloud cover in December: 61

The month with the most cloud cover is July (Cloud cover 67).
The month with the least cloud cover is April (Cloud cover 56).

Average visibility in December
Knockaderry, Ireland

Average visibility in December: 9km

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