Just went through some common US and European cities off the top of my head and got surprised by places that are normally considered to have brutal/cold winters, now having warmer weather than Ireland. I guess they have a few months of really cold weather which is much colder than what we get in Ireland but overall we get more miserable days or it takes longer to warm up here than in these other places. I think I'd rather take -20 winters for a few months and have 15-20 degrees from the start of March. Even eastern European countries with low hardiness zones are same or warmer than Ireland (Kiev, Ukraine, 18 degrees).
So while we don't have brutal winters here, overall we have more chilly days 0 - 10c?