Before two years i traveled to Iceland (but in other cases too with tourists) and one day as i was discussing with an Icelander our talk ended up to what i love discussing about, weather. You can't visit Iceland and not say a word about weather there ...... but our conversation was quite hilarious because the Icelander didnt believe me when i told him that in Greece not only it snows but sometimes it snows a lot, like during past winter.
And what i learned made more enthousiastic, max record for Reykjavik regarding snow accumulation was ONLY 50 cm when there are towns in North Greece where it snows almost every year more than 30 cm. Of course frequency isnt the same, but let me show you some photos of snow from a city nearby Athens
YES Greece is not always WARM