Most visits to Luxembourg are trouble-free but you should be aware of the global risk of indiscriminate international terrorist attacks, which could be against civilian targets, including places frequented by foreigners.
Luxembourg is part of the West European Continental climatic region, and enjoys a temperate climate without extremes. Winters are mild, summers fairly cool, and rainfall is high.
Christmas in Luxembourg is celebrated with great pomp and grandeur. In fact, the preparation for the celebration of Christmas at Luxembourg starts much before the actual day.