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
Weather in December
Temperature
The shift into December reveals an average high-temperature of a still frosty 8.1°C (46.6°F), closely mirroring November's climate. In the month of December, Lettermore experiences a minor discrepancy from peak daytime temperatures, settling at an average low-temperature of 4.3°C (39.7°F).Humidity
January, July through December, with an average relative humidity of 87%, are the most humid months.Rainfall
In Lettermore, in December, it is raining for 20.8 days, with typically 66mm (2.6") of accumulated precipitation. Throughout the year, there are 235.1 rainfall days, and 619mm (24.37") of precipitation is accumulated.Snowfall
January through March and December are months with snowfall in Lettermore, Ireland. December is the first month it typically snows in Lettermore, Ireland. Throughout December, in the average 0.6 snowfall days, it receives 4mm (0.16") of snow. In Lettermore, during the entire year, snow falls for 3.1 days and aggregates up to 20mm (0.79") of snow.Daylight
With an average of 7h and 36min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 8:31 am and sunset at 4:24 pm. On the last day of the month, sunrise is at 8:53 am and sunset at 4:30 pm GMT.
Sunshine
With an average of 3.7h of sunshine, December has the least sunshine of the year in Lettermore, Ireland.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 minimal health hazard from exposure to the Sun's UV radiation for average individuals.Note: A maximum daily UV index of 2 during December morphs into the following directions:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Frequently asked questions
What are December temperatures in Lettermore?
What are the most humid months in Lettermore?
What is the average humidity in December in Lettermore?
How much does it rain in Lettermore in December?
When does it start to snow in Lettermore?
What is the month with the shortest days in Lettermore?
How many hours of daylight does Lettermore have in December?
What time are sunrise and sunset in December in Lettermore?
What is the month with the least sunshine in Lettermore?
How many hours of sunshine does Lettermore have in December?
What are the months with the lowest UV index in Lettermore?
What is the UV index reading in December in Lettermore?
Average temperature in December
Lettermore, Ireland
- Average high temperature in December: 8.1°C
The warmest month (with the highest average high temperature) is July (17.3°C).
The month with the lowest average high temperature is January (7.9°C).
- Average low temperature in December: 4.3°C
The month with the highest average low temperature is August (11.4°C).
The coldest month (with the lowest average low temperature) is February (3.3°C).
Average pressure in December
Lettermore, Ireland
- Average pressure in December: 1010.2mbar
The month with the highest atmospheric pressure is May (1015.7mbar).
The month with the lowest atmospheric pressure is November (1007.7mbar).
Average wind speed in December
Lettermore, Ireland
- Average wind speed in December: 22.2km/h
The windiest months (with the highest average wind speed) are February and December (22.2km/h).
The calmest month (with the lowest average wind speed) is July (14.8km/h).
Average humidity in December
Lettermore, Ireland
- Average humidity in December: 87%
The months with the highest relative humidity are January, July, August, September, October, November and December (87%).
The months with the lowest relative humidity are March and April (83%).
Average rainfall in December
Lettermore, Ireland
- Average rainfall in December: 66mm
The wettest month (with the highest rainfall) is November (69mm).
The driest month (with the least rainfall) is April (36mm).
Average rainfall days in December
Lettermore, Ireland
- Average rainfall days in December: 20.8 days
The month with the highest number of rainy days is August (23.2 days).
The month with the least rainy days is April (17.3 days).
Average snowfall in December
Lettermore, Ireland
- Average snowfall in December: 4mm
The month with the highest snowfall is January (7mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in December
Lettermore, Ireland
- Average snowfall days in December: 0.6 days
The month with the highest number of snowfall days is March (0.9 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Lettermore, Ireland
- Average daylight in December: 7h and 4min
The month with the longest days is June (Average daylight: 16h and 54min).
The month with the shortest days is December (Average daylight: 7h and 36min).
- Average sunshine in December: 3h and 4min
The month with the most sunshine is June (Average sunshine: 7h and 24min).
The month with the least sunshine is December (Average sunshine: 3h and 42min).
Average sunshine days in December
Lettermore, Ireland
- Average sunshine days in December: 7.1 days
The month with the most sunshine days is March (9.4 days).
The month with the least sunshine days is August (4.1 days).
Average UV index in December
Lettermore, Ireland
- Average UV index in December: 2
The months with the highest UV index are May, June and July (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
Lettermore, Ireland
- Average cloud cover in December: 63
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
Lettermore, Ireland
- Average visibility in December: 9km
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (9km).
The month with the lowest visibility is July (8km).
Lettermore, Ireland
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