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The Irish Climate

(from the Irish weather service - Met Eireann)
The dominant influence on Ireland's climate is the Atlantic Ocean. Consequently, Ireland does not suffer from the extremes of temperature experienced by many other countries at similar latitude.

Average annual temperature is about 9 °C. In the middle and east of the country temperatures tend to be somewhat more extreme than in other parts of the country. For example, summer mean daily maximum is about 19 °C and winter mean daily minimum is about 2.5 °C in these areas.

TEMPERATURE (degrees Celsius)
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Year
mean daily max
8.2
8.6
10.6
12.9
15.7
18.2
20.3
20.2
17.8
14.1
10.8
8.8
13.8
SUNSHINE (hours)
mean daily duration
1.8
2.3
3.2
4.9
5.6
4.9
4.7
4.7
4
3
2.2
1.6
3.6
RAINFALL (mm)
mean num. of days with >= 1.0mm
13
12
12
10
11
10
9
10
10
13
12
13
135

Mean annual windspeed varies between about 4 m/sec in the east midlands and 7 m/sec in the northwest. Strong winds tend to be more frequent in winter than in summer. Sunshine duration is highest in the southeast of the country. Average rainfall varies between about 800 and 2,800mm.

With southwesterly winds from the Atlantic dominating, rainfall figures are highest in the northwest, west and southwest of the country, especially over the higher ground. Rainfall accumulation tends to be highest in winter and lowest in early summer.

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Weather maps provided by: MET EIREANN

Sunshine in Ireland

The sunniest months are May and June. During these months sunshine duration averages between 5 and 6.5 hours per day over most of the country. The extreme southeast gets the most sunshine, averaging over 7 hours a day in early summer. December is the dullest month with an average daily sunshine ranging from about 1 hour in the north to almost 2 hours in the extreme southeast. Over the year as a whole most areas get an average of between 3 1/4 and 3 3/4 hours of sunshine each day.


Rainfall in Ireland

Most of the eastern half of the country has between 750 and 1000 millimetres (mm) of rainfall in the year. Rainfall in the west generally averages between 1000 and 1250 mm. In many mountainous districts rainfall exceeds 2000mm per year. The wettest months, almost everywhere are December and January. April is the driest month generally but in many southern parts, June is the driest. Hail and snow contribute relatively little to the precipitation measured.

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