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
With the onset of December, Castleisland's average high-temperature clocks in at a frosty 8.7°C (47.7°F), showing a minor fluctuation from the previous month. Throughout December, Castleisland's nights experience a slight temperature dip to a wintry 5.6°C (42.1°F).Humidity
In December, the average relative humidity is 85%.Rainfall
December is the month with the most rainfall. Rain falls for 20.4 days and accumulates 80mm (3.15") of precipitation.Snowfall
Months with snowfall are January through March, November and December. December is the month with the most snowfall. Snow falls for 0.8 days and accumulates 16mm (0.63") of snow.Daylight
With an average of 7h and 48min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 8:25 am and sunset at 4:28 pm. On the last day of December, sunrise is at 8:47 am and sunset at 4:35 pm GMT.
Sunshine
January and December, with an average of 3.8h of sunshine, are months with the least sunshine.UV index
January, February, 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 vulnerability from exposure to the Sun's UV radiation for the average person.Note: The daily high UV index of 2 during December translates into the following recommendations:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Castleisland in December?
What is the average humidity in December?
What is the wettest month?
How many days does it rain in December?
When does it snow the most?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Castleisland have in December?
When is the sunrise / sunset in December?
What is the month with the least sunshine?
How long on average sun shines in December?
What is the month with the lowest UV index?
How high is the UV index in December in Castleisland?
Average temperature in December
Castleisland, Ireland
- Average high temperature in December: 8.7°C
The warmest month (with the highest average high temperature) is July (16.8°C).
The month with the lowest average high temperature is January (8.2°C).
- Average low temperature in December: 5.6°C
The month with the highest average low temperature is July (12.3°C).
The coldest month (with the lowest average low temperature) is February (4.7°C).
Average pressure in December
Castleisland, Ireland
- Average pressure in December: 1011.2mbar
The month with the highest atmospheric pressure is May (1016.1mbar).
The month with the lowest atmospheric pressure is November (1008.5mbar).
Average wind speed in December
Castleisland, Ireland
- Average wind speed in December: 23.8km/h
The windiest month (with the highest average wind speed) is December (23.8km/h).
The calmest month (with the lowest average wind speed) is July (15.5km/h).
Average humidity in December
Castleisland, Ireland
- Average humidity in December: 85%
The months with the highest relative humidity are July, August, September and October (86%).
The month with the lowest relative humidity is April (82%).
Average rainfall in December
Castleisland, Ireland
- Average rainfall in December: 80mm
The wettest month (with the highest rainfall) is December (80mm).
The driest month (with the least rainfall) is May (42mm).
Average rainfall days in December
Castleisland, Ireland
- Average rainfall days in December: 20.4 days
The month with the highest number of rainy days is January (21.8 days).
The month with the least rainy days is April (16.5 days).
Average snowfall in December
Castleisland, Ireland
- Average snowfall in December: 16mm
The month with the highest snowfall is December (16mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in December
Castleisland, Ireland
- Average snowfall days in December: 0.8 days
The month with the highest number of snowfall days is February (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
Castleisland, Ireland
- Average daylight in December: 7h and 5min
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: 3h and 5min
The month with the most sunshine is June (Average sunshine: 7h and 42min).
The months with the least sunshine are January and December (Average sunshine: 3h and 48min).
Average sunshine days in December
Castleisland, Ireland
- Average sunshine days in December: 7.6 days
The month with the most sunshine days is April (10.8 days).
The month with the least sunshine days is August (6.2 days).
Average UV index in December
Castleisland, Ireland
- Average UV index in December: 2
The months with the highest UV index are May, June and August (UV index 4).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Castleisland, Ireland
- Average cloud cover in December: 63
The month with the most cloud cover is July (Cloud cover 64).
The month with the least cloud cover is April (Cloud cover 53).
Average visibility in December
Castleisland, Ireland
- Average visibility in December: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
Castleisland, Ireland
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