December weather forecastIreland, WA
December
Weather in December
December, the first month of the winter in Ireland, is also a frosty month, with an average temperature ranging between min 33.3°F (0.7°C) and max 43.3°F (6.3°C).Temperature
Ireland's December weather, with an average high temperature of 43.3°F (6.3°C) and an average low temperature of 33.3°F (0.7°C), tends to be the coldest of the year.Humidity
In December, the average relative humidity is 83%.Rainfall
December is the month with the most rainfall in Ireland. Rain falls for 19 days and accumulates 5.63" (143mm) of precipitation.Snowfall
Months with snowfall in Ireland, Washington, are January through March, November and December. In December, in Ireland, it is snowing for 0.9 days. Throughout December, 0.51" (13mm) of snow is accumulated. Throughout the year, there are 6.3 snowfall days, and 4.37" (111mm) of snow is accumulated.Daylight
December has the shortest days of the year in Ireland, with an average of 8h and 48min of daylight.On the first day of December in Ireland, sunrise is at 7:30 am and sunset at 4:27 pm. On the last day of the month, sunrise is at 7:50 am and sunset at 4:35 pm PST.
Sunshine
The average sunshine in December in Ireland is 4.2h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Ireland. A UV Index reading of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for the average person.Note: In December, a daily maximum UV index of 2 leads to the following instructions:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Ireland, WA
- Average high temperature in December: 43.3°F
The warmest month (with the highest average high temperature) is August (79.7°F).
The month with the lowest average high temperature is December (43.3°F).
- Average low temperature in December: 33.3°F
The month with the highest average low temperature is August (52.7°F).
The coldest month (with the lowest average low temperature) is December (33.3°F).
Average pressure in December
Ireland, WA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed in December
Ireland, WA
- Average wind speed in December: 6.3mph
The windiest month (with the highest average wind speed) is January (6.8mph).
The calmest month (with the lowest average wind speed) is August (3.5mph).
Average humidity in December
Ireland, WA
- Average humidity in December: 83%
The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is August (65%).
Average rainfall in December
Ireland, WA
- Average rainfall in December: 5.63"
The wettest month (with the highest rainfall) is December (5.63").
The driest month (with the least rainfall) is July (0.31").
Average rainfall days in December
Ireland, WA
- Average rainfall days in December: 19 days
The month with the highest number of rainy days is March (19.6 days).
The month with the least rainy days is August (4.1 days).
Average snowfall in December
Ireland, WA
- Average snowfall in December: 0.51"
The month with the highest snowfall is February (1.54").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Ireland, WA
- Average snowfall days in December: 0.9 days
The month with the highest number of snowfall days is February (2.2 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
Ireland, WA
- Average daylight in December: 8h and 48min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in December: 4h and 12min
The month with the most sunshine is August (Average sunshine: 11h and 0min).
The month with the least sunshine is February (Average sunshine: 4h and 6min).
Average sunshine days in December
Ireland, WA
- Average sunshine days in December: 10.5 days
The month with the most sunshine days is August (25.3 days).
The month with the least sunshine days is February (8.6 days).
Average UV index in December
Ireland, WA
- Average UV index in December: 2
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Ireland, WA
- Average cloud cover in December: 56
The month with the most cloud cover is February (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 24).
Average visibility in December
Ireland, WA
- Average visibility in December: 5mi
The months with the highest visibility are July, August and September (6mi).
The months with the lowest visibility are January, February, March, April, May, June, October, November and December (5mi).
