Ireland receives generally warm summers and mild winters. It is considerably warmer than other areas on its latitude, because it lies in the north-eastern Atlantic Ocean, and as a result is warmed by the North Atlantic current all year.
The coldest months are January and February with average daily air temperatures of between 4°C and 7°C, while July and August are the warmest (14°C to 16°C on average).
Inland areas are a little cooler in winter and warmer in summer than their coastal counterparts, but extreme temperatures are rare.
On the other hand the weather is moist and changeable for most of the year. As you probably know, Ireland does get a lot of rainfall but it tends to be light rain and showers.
Learn to fit in
The Irish have lots of colourful phrases to describe their weather, especially different types of rain. One you will hear a lot is “a soft day”, which means cloudy weather with soft mist or drizzle. A “grand soft day”, on the other hand, is humid with a fine, light drizzle. “Dry rain” means that technically speaking, it is raining, but not enough to get you wet.
You are better off taking an umbrella (or staying indoors) if people say it is “lashing it down”!
The sooner you learn to talk about the weather, the sooner you’ll fit into Irish society!