In reply to danny269:
I lived within an hours drive of the Reeks for over ten years. I never managed a visit when there were conditions good enough for what you would classify as 'winter climbing'. Sure they got snow but it never ever lasts for long (sometimes just an afternoon, sometimes a week) due to the proximity of the sea and the gulf stream and thus never did I come across consolidated snow.
That said it may well be mild and if its not too wet and you can find it, there are some excellent ridges on Carrauntoohill around 1000ft and well worth doing. Howling ridge is one!