December weather forecastCastlegar, Ireland
December weather for Castlegar, Ireland: The months with the highest humidity in Castlegar, Ireland, are January, July through December, with an average relative humidity of 87%. January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Castlegar, Ireland.
December
Weather in December
December, the first month of the winter in Castlegar, is also a frosty month, with an average temperature fluctuating between 8.1°C (46.6°F) and 4.3°C (39.7°F).Temperature
The average high-temperature for December is a still chilly 8.1°C (46.6°F), closely aligning with the temperature of the preceding month. During December, nights cool slightly to an average low of 4.3°C (39.7°F).Humidity
The months with the highest humidity are January, July through December, with an average relative humidity of 87%.Rainfall
In December, in Castlegar, the rain falls for 20.8 days. Throughout December, 66mm (2.6") of precipitation is accumulated. In Castlegar, during the entire year, the rain falls for 235.1 days and collects up to 619mm (24.37") of precipitation.Snowfall
January through March and December are months with snowfall. December is the first month it typically snows in Castlegar. Throughout December, in the average 0.6 snowfall days, it receives 4mm (0.16") of snow. In Castlegar, during the entire year, snow falls for 3.1 days and aggregates up to 20mm (0.79") of snow.Daylight
The month with the shortest days is December, with an average of 7h and 36min of daylight.On the first day of the month, sunrise is at 8:28 am and sunset at 4:21 pm. On the last day of December, in Castlegar, sunrise is at 8:50 am and sunset at 4:27 pm GMT.
Sunshine
With an average of 3.7h of sunshine, December has the least sunshine of the year in Castlegar.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to UV radiation for average individuals.Note: The maximum daily UV index of 2 during December translates into the following directions:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Castlegar, 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
Castlegar, 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
Castlegar, 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
Castlegar, 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
Castlegar, 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
Castlegar, 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
Castlegar, 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
Castlegar, 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
Castlegar, Ireland
- Average daylight in December: 7h and 36min
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 42min
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
Castlegar, 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
Castlegar, 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
Castlegar, 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
Castlegar, 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).
