Snow in Vienna? ウィーンに雪?

Today in Vienna the lowest temperature was 3 degrees Celcius and the highest temperature was 9 degrees. I am sure that it did not snow today. But why is there some snow at Christmas market in front of city hall? In the lower picture you can see that snow was brought from somewhere to decorate. The building in the picture is Burgtheater (National Theatre).

今日のウィーンの最低気温は摂氏3度、最高気温は摂氏9度。雪なんて降らなかったよね… それなのに何故、市庁舎前のクリスマスの市のお店の前に雪が積もってるの? 下の写真をご覧ください。どこからか雪を持ってきて、ところどころに、あたかも降ったかのように置いているのですね。(向こうの建物は王宮劇場です)

Picture by Yuka Simeno 2019