Ireland weather falls in the temperate maritime category. In other words, Ireland weather is mild, moist, variable and with hefty doses of rainfall. Thanks to its proximity to Atlantic Ocean and the presence of the Gulf Stream, Ireland is free of extreme temperature conditions, so common of areas at similar latitude.

While average annual temperature is about 9 °C, the middle and the east of the country experience somewhat more extreme conditions than the rest of the country, with summer mean daily maximums hovering around 19 °C dropping to a significantly colder 2.5 °C during winter.

Fluctuation is also experienced in both wind speed and frequency. In the east midlands winds pick up speeds of about 4 m/sec and in the northwest can speed as much as 7 m/sec. In comparison to winter, summer experiences more frequent and stronger speeds.
The southeast of Ireland experiences longer periods of sunshine and average rainfall varies between about 800 and 2,800mm. The northwest, west and southwest of the country receive significantly higher figures of rainfall thanks to the dominating southwesterly winds from the Atlantic. Rainfall accumulation tends to be highest in winter and lowest in early summer.

The drier parts of Ireland experience around 150 days with more than 1 mm of rain, and the wetter parts of the country around 200.